Subsequent Events [Abstract] Subsequent Event [Table] Subsequent Event [Table] Subsequent Event Type [Axis] Subsequent Event Type [Axis] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Subsequent Event [Line Items] Subsequent Event [Line Items] Subsequent Events [Text Block] Subsequent Events [Text Block] Supplemental Cash Flow Information [Abstract] Supplemental Cash Flow Information [Table] Supplemental Cash Flow Information [Table] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Preferred Stock [Member] Preferred Stock [Member] Supplemental Cash Flow Information [Line Items] Supplemental Cash Flow Information [Line Items] Cash payments related to operating lease liabilities Operating Lease, Payments Interest paid Interest Paid, Including Capitalized Interest, Operating and Investing Activities Income Taxes Paid Income Taxes Paid, Net New ROU assets obtained in exchange for operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Increase (decrease) in accounts payable for purchases of property and equipment Increase (Decrease) in accounts payable for purchases of property and equipment Increase (Decrease) in accounts payable for purchases of property and equipment Purchase of property and equipment under capital leases and installment purchases Purchase of property and equipment under capital leases and installment purchases Purchase of property and equipment under capital leases and installment purchases Commitments and Contingencies Disclosure [Abstract] Other Commitments [Table] Other Commitments [Table] Contractual Terms [Axis] Contractual Terms [Axis] Contractual Terms [Axis] Contractual Terms [Domain] Contractual Terms [Domain] [Domain] for Contractual Terms [Axis] Subject to Capital Lease with Sprint, TMO, or AT&T [Member] Subject to Capital Lease with Sprint, TMO, or AT&T [Member] Subject to Capital Lease with Sprint, TMO, or AT&T [Member] Other Commitments [Line Items] Other Commitments [Line Items] Purchase Option, Percentage of Towers Purchase Option, Percentage of Towers Purchase Option, Percentage of Towers Revenue from Contract with Customer [Abstract] Schedule of Contractual Revenue Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block] Segment Reporting [Abstract] Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Accounting Policies [Abstract] Statement [Table] Statement [Table] Statistical Measurement [Axis] Statistical Measurement [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Statement [Line Items] Statement [Line Items] Ground Lease Agreement Term Ground Lease Agreement Term This disclosure represents the term of the Company’s ground lease agreements Statement, Scenario [Axis] Scenario [Axis] Scenario [Domain] Scenario [Domain] Per Share Information Per Share Information n/a Income Statement [Abstract] Net revenues: Revenues [Abstract] Site Rental Site Rental Revenues Contains revenue from accounted under both Topic 606 (Finance leases) and Topic 842 (Operating leases) Services and other Revenue from Contract with Customer, Excluding Assessed Tax Net Revenues Revenues Operating expenses: Operating Expenses [Abstract] Site rental Direct Costs of Leased and Rented Property or Equipment Services and other Cost of Goods and Services Sold Selling, general and administrative Selling, General and Administrative Expense Asset write-down charges Asset Impairment Charges Acquisition and integration costs Acquisition and integration costs This element represents acquisition and integration related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs; integration costs; and may include costs of registering and issuing debt and equity securities. Depreciation, amortization and accretion Depreciation, Amortization and Accretion, Net Total operating expenses Costs and Expenses Operating income (loss) Operating Income (Loss) Nonoperating Income (Expense) [Abstract] Nonoperating Income (Expense) [Abstract] Interest expense and amortization of deferred financing costs Interest Expense, Debt Gains (losses) on retirement of long-term obligations Gain (Loss) on Extinguishment of Debt Interest income Investment Income, Interest Other income (expense) Other Nonoperating Income (Expense) Income (loss) before income taxes Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest Benefit (provision) for income taxes Income Tax Expense (Benefit) Net income (loss) attributable to CCIC stockholders Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Dividends/distributions on preferred stock Dividends, Preferred Stock Net income (loss) attributable to CCIC common stockholders Net Income (Loss) Available to Common Stockholders, Basic Other Comprehensive Income (Loss), Net of Tax [Abstract] Other Comprehensive Income (Loss), Net of Tax [Abstract] Foreign currency translation adjustments Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax Total other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Comprehensive income (loss) attributable to CCIC stockholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Net income (loss) attributable to CCIC common stockholders, per common share: Earnings Per Share [Abstract] Basic Earnings Per Share, Basic Diluted Earnings Per Share, Diluted Weighted-average common shares outstanding (in millions): Earnings Per Share Basic and Diluted Other Disclosures n/a Basic Weighted Average Number of Shares Outstanding, Basic Diluted Weighted Average Number of Shares Outstanding, Diluted Fair Value Disclosures [Abstract] Estimated Fair Values and Carrying Amounts of Assets and Liabilities Fair Value, by Balance Sheet Grouping [Table Text Block] Statement of Cash Flows [Abstract] Scenario [Axis] Cash flows from operating activities: Net Cash Provided by (Used in) Operating Activities [Abstract] Net income (loss) Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent Adjustments to reconcile net income (loss) to net cash provided by (used for) operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] (Gains) losses on retirement of long-term obligations Amortization of deferred financing costs and other non-cash interest Amortization of Debt Issuance Costs and Discounts Stock-based compensation expense Share-based Payment Arrangement, Noncash Expense Deferred income tax (benefit) provision Deferred Income Tax Expense (Benefit) Other non-cash adjustments Other Noncash Income (Expense) Changes in assets and liabilities, excluding the effects of acquisitions: Increase (Decrease) in Operating Capital [Abstract] Increase (decrease) in accrued interest Increase (Decrease) in Interest Payable, Net Increase (decrease) in accounts payable Increase (Decrease) in Accounts Payable, Trade Increase (decrease) in other liabilities Increase (Decrease) in Other Operating Liabilities Decrease (increase) in receivables Increase (Decrease) in Receivables Decrease (increase) in other assets Increase (Decrease) in Other Operating Assets Net cash provided by (used for) operating activities Net Cash Provided by (Used in) Operating Activities Cash flows from investing activities: Net Cash Provided by (Used in) Investing Activities [Abstract] Payments for acquisitions, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Capital expenditures Payments to Acquire Productive Assets Other investing activities, net Payments for (Proceeds from) Other Investing Activities Net cash provided by (used for) investing activities Net Cash Provided by (Used in) Investing Activities Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from issuance of long-term debt Proceeds from Issuance of Long-term Debt Principal payments on debt and other long-term obligations Repayments of Other Debt Purchases and redemptions of long-term debt Repayments of Long-term Debt Borrowings under revolving credit facility Proceeds from Lines of Credit Payments under revolving credit facility Repayments of Lines of Credit Proceeds from Issuance of Commercial Paper Proceeds from Issuance of Commercial Paper Payments for financing costs Payments of Financing Costs Net proceeds from issuance of common stock Proceeds from Issuance or Sale of Equity Purchases of Common Stock Payments for Repurchase of Common Stock Dividends/distributions paid on common stock Payments of Ordinary Dividends, Common Stock Dividends/distributions paid on preferred stock Payments of Ordinary Dividends, Preferred Stock and Preference Stock Net cash provided by (used for) financing activities Net Cash Provided by (Used in) Financing Activities Net increase (decrease) in cash, cash equivalents, and restricted cash Cash and Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect Cash, cash equivalents and restricted cash at beginning of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Cash, cash equivalents, and restricted cash at end of period Effect of Exchange Rate on Cash and Cash Equivalents [Abstract] Effect of Exchange Rate on Cash and Cash Equivalents [Abstract] Effect of exchange rate changes Effect of Exchange Rate on Cash and Cash Equivalents Reconciliation of the Numerators and Denominators of the Basic and Diluted Per Share Computations Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Equity [Abstract] Dividends Payable [Table] Dividends Payable [Table] Common Stock [Member] Common Stock [Member] Dividends Payable [Line Items] Dividends Payable [Line Items] Dividends Payable, Date Declared Dividends Payable, Date Declared Dividends Payable, Date of Record Dividends Payable, Date of Record Dividends Payable, Date to be Paid Dividends Payable, Date to be Paid Preferred Stock, Dividends, Per Share, Cash Paid Preferred Stock, Dividends, Per Share, Cash Paid Common Stock, Dividends, Per Share, Cash Paid Common Stock, Dividends, Per Share, Cash Paid Dividends, Common Stock, Cash Dividends, Common Stock, Cash Dividends, Preferred Stock, Cash Dividends, Preferred Stock, Cash Common stock repurchased during period, shares Stock Repurchased During Period, Shares Availability Under ATM Availability Under ATM Availability Under ATM Leases [Abstract] Operating Lease, Weighted Average Remaining Lease Term Operating Lease, Weighted Average Remaining Lease Term Lessee, Operating Lease, Discount Rate Lessee, Operating Lease, Discount Rate Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Segments [Axis] Segments [Axis] Segments [Domain] Segments [Domain] Segment cost of operations share-based compensation [Member] Segment cost of operations share-based compensation [Member] Segment cost of operations share-based compensation Towers [Member] Towers [Member] Towers Fiber [Member] Fiber [Member] Fiber Consolidated Total [Member] Consolidated Entities [Member] Corporate and Other [Member] Corporate and Other [Member] Segment G&A share-based compensation [Member] Segment G&A share-based compensation [Member] Segment G&A share-based compensation Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Tower Count Tower Count Represents the Company's tower count. Inclusive of towers and other structures, such as rooftops Fiber Miles Fiber Miles Fiber Miles that the Company owns and operates. Amortization of prepaid lease purchase price adjustments Amortization of prepaid lease purchase price adjustments Represents the amortization of prepaid lease purchase price adjustments for the period presented. Segment Revenues Segment site rental cost of operations Segment cost of operations Cost of Revenue Segment site rental gross margin Segment site rental gross margin Segment site rental gross margin is defined as segment site rental revenues less segment site rental cost of operations, which excludes stock-based compensation expense and prepaid lease purchase price adjustments recorded in consolidated cost of operations. Segment services gross margin Segment services and other gross margin Segment services and other gross margin is defined as segment services and other revenues less segment services and other cost of operations, which excludes stock-based compensation expense recorded in consolidated cost of operations. Segment selling, general and administrative expenses Segment Operating Profit Segment Operating Profit Segment Operating Profit is defined as segment site rental gross margin plus segment network services and other gross margin, less general and administrative expenses attributable to the respective segment. Depreciation, Amortization and Accretion, Net Other expenses to reconcile to income (loss) from continuing operations before income taxes Other Expenses Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Capital expenditures Total Assets Assets Supplemental Cash Flow Elements [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Restricted cash Restricted Cash and Cash Equivalents, Current Restricted Cash, Noncurrent Restricted Cash, Noncurrent Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Contractual Maturities [Abstract] Contractual Maturities [Abstract] Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year Long-term Debt, Maturities, Repayments of Principal in Year Two Long-term Debt, Maturities, Repayments of Principal in Year Two Long-term Debt, Maturities, Repayments of Principal in Year Three Long-term Debt, Maturities, Repayments of Principal in Year Three Long-term Debt, Maturities, Repayments of Principal in Year Four Long-term Debt, Maturities, Repayments of Principal in Year Four Long-term Debt, Maturities, Repayments of Principal in Year Five Long-term Debt, Maturities, Repayments of Principal in Year Five Long-term Debt, Maturities, Repayments of Principal after Year Five Long-term Debt, Maturities, Repayments of Principal after Year Five Total Cash Obligations Long-term Debt, Gross Unamortized Adjustments, Net Debt Instrument, Unamortized Discount Debt and Finance Lease Obligations Debt and Lease Obligation Operating Segments Segment Reporting Disclosure [Text Block] Significant Accounting Policies Significant Accounting Policies [Text Block] Supplemental Cash Flow Information Cash Flow, Supplemental Disclosures [Text Block] Condensed Consolidated Balance Sheet (Parenthetical) [Abstract] Condensed Consolidated Balance Sheet (Parenthetical) [Abstract] Accumulated depreciation, property and equipment Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Preferred Stock, Par or Stated Value Per Share Preferred Stock, Par or Stated Value Per Share Preferred Stock, Shares Authorized Preferred Stock, Shares Authorized Preferred Stock, Shares Issued Preferred Stock, Shares Issued Preferred Stock, Shares Outstanding Preferred Stock, Shares Outstanding Preferred Stock, Liquidation Preference, Value Preferred Stock, Liquidation Preference, Value Common stock, par value Common Stock, Par or Stated Value Per Share Common stock, shares authorized Common Stock, Shares Authorized Common stock, shares outstanding Common Stock, Shares, Outstanding Operating Leases, Future Minimum Payments Due, Next Twelve Months Operating Leases, Future Minimum Payments Due, Next Twelve Months Operating Leases, Future Minimum Payments, Due in Two Years Operating Leases, Future Minimum Payments, Due in Two Years Operating Leases, Future Minimum Payments, Due in Three Years Operating Leases, Future Minimum Payments, Due in Three Years Operating Leases, Future Minimum Payments, Due in Four Years Operating Leases, Future Minimum Payments, Due in Four Years Operating Leases, Future Minimum Payments, Due in Five Years Operating Leases, Future Minimum Payments, Due in Five Years Operating Leases, Future Minimum Payments, Due Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Operating Leases, Future Minimum Payments Due Operating Leases, Future Minimum Payments Due Cash and cash equivalents, at carrying value Cash and cash equivalents, fair value Cash and Cash Equivalents, Fair Value Disclosure Restricted Cash Restricted Cash Restricted Cash Fair Value Disclosure Restricted Cash Fair Value Disclosure The fair value of cash and cash equivalent items which are restricted as to withdrawal or usage. Restricted cash, current and non-current, carrying value Restricted Cash and Cash Equivalents Long-term debt and other obligations, carrying amount Long-term debt and other obligations, fair value Obligations, Fair Value Disclosure Equity Stockholders' Equity Note Disclosure [Text Block] Debt and Other Obligations [Abstract] Debt and Other Obligations [Abstract} Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] High Yield Bonds [Member] High Yield Bonds [Member] High Yield Bonds [Member] 2016 Revolver [Member] 2016 Revolver [Member] 2016 Revolver [Member] Capital Lease Obligations and Other [Member] Capital Lease Obligations and Other [Member] Capital Lease Obligations and Other High Yield Bonds [Member] Bonds [Member] Unsecured Debt [Member] Unsecured Debt [Member] Securitized Debt [Member] Secured Debt [Member] Bank Debt [Member] Bank Debt [Member] Bank Debt [Member] Commercial Paper [Member] Commercial Paper [Member] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] August 2019 Senior Notes [Domain] August 2019 Senior Notes [Domain] August 2019 Senior Notes 2016 Term Loan A [Member] 2016 Term Loan A [Member] 2016 Term Loan A [Member] February 2019 Senior Notes [Domain] February 2019 Senior Notes [Domain] February 2019 Senior Notes [Domain] 2015 Tower Revenue Notes 3.222% due 2042 [Member] 2015 Tower Revenue Notes 3.222% due 2042 [Member] 2015 Tower Revenue Notes 3.222% due 2042 [Member] 2015 Tower Revenue Notes 3.663% due 2045 [Member] 2015 Tower Revenue Notes 3.663% due 2045 [Member] 2015 Tower Revenue Notes 3.663% due 2045 [Member] 2018 Tower Revenue Notes 3.720% due 2043 [Member] 2018 Tower Revenue Notes 3.720% due 2043 [Member] 2018 Tower Revenue Notes 3.720% due 2043 [Member] 2018 Tower Revenue Notes 4.241% due 2048 [Member] 2018 Tower Revenue Notes 4.241% due 2048 [Member] 2018 Tower Revenue Notes 4.241% due 2048 [Member] 3.849% Secured Notes [Member] 3.849% Secured Notes [Member] 3.849% Secured Notes [Member] Fixed Rate Debt 2009 Securitized Notes A-1 [Member] Fixed Rate Debt 2009 Securitized Notes A-1 [Member] Fixed Rate Debt 2009 Securitized Notes A-1 Fixed Rate Debt 2009 Securitized Notes A-2 [Member] Fixed Rate Debt 2009 Securitized Notes A-2 [Member] Fixed Rate Debt 2009 Securitized Notes A-2 [Member] 5.250% Senior Notes [Member] 5.250% Senior Notes [Member] 5.250% Senior Notes [Member] 4.875% Senior Notes [Member] 4.875% Senior Notes [Member] 4.875% Senior Notes [Member] Senior Unsecured 2016 Notes 3.40% [Member] Senior Unsecured 2016 Notes 3.40% [Member] Senior Unsecured 2016 Notes 3.40% Senior Unsecured 2016 Notes 4.450% [Member] Senior Unsecured 2016 Notes 4.450% [Member] Senior Unsecured 2016 Notes 4.450% Senior Unsecured 2016 Notes 3.7% [Member] Senior Unsecured 2016 Notes 3.7% [Member] Senior Unsecured 2016 Notes 3.7% [Member] 2.250% Senior Notes [Member] 2.250% Senior Notes [Member] 2.250% Senior Notes [Member] 4.000% Senior Unsecured Notes [Member] 4.000% Senior Unsecured Notes [Member] 4.000% Senior Unsecured Notes [Member] 4.750% Senior Unsecured Notes [Member] [Member] 4.750% Senior Unsecured Notes [Member] [Member] 4.750% Senior Unsecured Notes [Member] [Member] August 2017 Senior Unsecured 3.200% Notes [Member] August 2017 Senior Unsecured 3.200% Notes [Member] August 2017 Senior Unsecured 3.200% Notes [Member] August 2017 Senior Unsecured 3.650% Notes [Member] August 2017 Senior Unsecured 3.650% Notes [Member] August 2017 Senior Unsecured 3.650% Notes [Member] 3.150% Senior Notes [Member] 3.150% Senior Notes [Member] 3.150% Senior Notes [Member] 3.800% Senior Notes [Member] 3.800% Senior Notes [Member] 3.800% Senior Notes [Member] February 2019 Senior Unsecured 4.300% Notes [Member] February 2019 Senior Unsecured 4.300% Notes [Member] February 2019 Senior Unsecured 4.300% Notes [Member] February 2019 Senior Unsecured 5.200% Notes [Member] February 2019 Senior Unsecured 5.200% Notes [Member] February 2019 Senior Unsecured 5.200% Notes [Member] Fixed Rate Securitized Debt July 2018 Tower Revenue Notes [Member] July 2018 Tower Revenue Notes [Member] July 2018 Tower Revenue Notes [Member] August 2019 Senior Unsecured 3.100% Notes [Member] August 2019 Senior Unsecured 3.100% Notes [Member] August 2019 Senior Unsecured 3.100% Notes [Member] August 2019 Senior Unsecured 4.000% Notes [Member] August 2019 Senior Unsecured 4.000% Notes [Member] August 2019 Senior Unsecured 4.000% Notes [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Debt, Weighted Average Interest Rate Debt, Weighted Average Interest Rate Debt Instrument, Interest Rate, Increase (Decrease) Debt Instrument, Interest Rate, Increase (Decrease) Debt Instrument, Face Amount Debt Instrument, Face Amount Debt Instrument, Interest Rate, Stated Percentage Debt Instrument, Interest Rate, Stated Percentage Commercial Paper - Maximum Issued Commercial Paper - Maximum Issued Commercial Paper - Maximum Issued Debt Instrument, Maturity Date, Description Debt Instrument, Maturity Date, Description Proceeds from Issuance of Debt Proceeds from Issuance of Debt Commercial Paper Commercial Paper Debt Instrument Maturity Date Range Debt Instrument Maturity Date Range Date range when the debt instrument is schedule to be fully repaid, which may be presented in a variety of ways (year, month and year, day, month, and year, quarter, etc). Debt Instrument, Unused Borrowing Capacity, Amount Line of Credit Facility, Remaining Borrowing Capacity Less: current maturities and short-term debt and other current obligations Debt, Current Non-current portion of long-term debt and other long-term obligations Long-term Debt and Lease Obligation Line of Credit Facility, Commitment Fee Percentage Line of Credit Facility, Commitment Fee Percentage Line of Credit Facility, Increase (Decrease), Net Line of Credit Facility, Increase (Decrease), Net Line of Credit Facility, Maximum Borrowing Capacity Line of Credit Facility, Maximum Borrowing Capacity Lessee, Operating Lease, Liability, Payments, Due Remainder of Fiscal Year Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months Lessee, Operating Lease, Liability, Payments, Due Year Two Lessee, Operating Lease, Liability, Payments, Due Year Two Lessee, Operating Lease, Liability, Payments, Due Year Three Lessee, Operating Lease, Liability, Payments, Due Year Three Lessee, Operating Lease, Liability, Payments, Due Year Four Lessee, Operating Lease, Liability, Payments, Due Year Four Lessee, Operating Lease, Liability, Payments, Due Year Five Lessee, Operating Lease, Liability, Payments, Due Year Five Lessee, Operating Lease, Liability, Payments, Due after Year Five Lessee, Operating Lease, Liability, Payments, Due after Year Five Lessee, Operating Lease, Liability, Payments, Due Lessee, Operating Lease, Liability, Payments, Due Inputed Interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Operating Lease, Liability Operating Lease, Liability Operating Lease, Expense Operating Lease, Expense Variable Lease, Cost Variable Lease, Cost Lease, Cost Lease, Cost Interest Expense, Debt, Excluding Amortization Interest Expense, Debt, Excluding Amortization Amortization of deferred financing costs and adjustments on long-term debt Amortization of Debt Issuance Costs Other, net of capitalized interest Interest Expense, Other Interest expense and amortization of deferred financing costs Fair Value Disclosures Fair Value Disclosures [Text Block] Debt and Other Obligations Debt and Capital Leases Disclosures [Text Block] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Property, Plant and Equipment [Member] Property, Plant and Equipment [Member] Finance Lease, Right-of-Use Asset Finance Lease, Right-of-Use Asset Accumulated Amortization Related to FInance Leases Accumulated Amortization Related to Finance Leases Accumulated Amortization Related to Finance Leases Finance Lease, Right-of-Use Asset, Amortization Finance Lease, Right-of-Use Asset, Amortization Per Share Information Earnings Per Share [Text Block] Dividends [Abstract] Dividends Declared Dividends Declared [Table Text Block] Leases Leases [Text Block] This disclosure represents the Company’s Lease footnote (operating and financing leases) Cover page. Entities [Table] Entities [Table] Class of Stock [Axis] Class of Stock [Axis] Class of Stock [Domain] Class of Stock [Domain] 6.875% Mandatory Convertible Preferred Stock [Member] 6.875% Mandatory Convertible Preferred Stock [Member] 6.875% Mandatory Convertible Preferred Stock [Member] Entity Information [Line Items] Entity Information [Line Items] Document Type Document Type Document Quarterly Report Document Quarterly Report Document Period End Date Document Period End Date Document Transition Report Document Transition Report Entity File Number Entity File Number Entity Registrant Name Entity Registrant Name Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Entity Tax Identification Number Entity Tax Identification Number Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two Entity Address, City or Town Entity Address, City or Town Entity Address, State or Province Entity Address, State or Province Entity Address, Postal Zip Code Entity Address, Postal Zip Code City Area Code City Area Code Local Phone Number Local Phone Number Title of 12(b) Security Title of 12(b) Security Entity Listing, Par Value Per Share Entity Listing, Par Value Per Share Trading Symbol Trading Symbol Security Exchange Name Security Exchange Name Entity Current Reporting Status Entity Current Reporting Status Entity Interactive Data Current Entity Interactive Data Current Entity Filer Category Entity Filer Category Entity Small Business Entity Small Business Entity Emerging Growth Company Entity Emerging Growth Company Entity Shell Company Entity Shell Company Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Statement of Financial Position [Abstract] ASSETS Assets [Abstract] Current assets: Assets, Current [Abstract] Receivables, net Accounts Receivable, after Allowance for Credit Loss, Current Prepaid expenses(a) Prepaid Expense, Current Other current assets Other Assets, Current Total current assets Assets, Current Deferred site rental receivables Deferred Rent Receivables, Net, Noncurrent Property and equipment, net of accumulated depreciation of $9,394 and $8,566, respectively Property, Plant and Equipment, Net Operating lease right-of-use assets(a) Operating Lease, Right-of-Use Asset Goodwill Goodwill Other intangible assets, net(a) Intangible Assets, Net (Excluding Goodwill) Long-term prepaid rent and other assets, net(a) Other Assets, Noncurrent Total assets LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable Accounts Payable, Current Accrued interest Interest Payable, Current Deferred revenues Deferred Revenue, Current Other accrued liabilities(a) Other Liabilities, Current Current maturities of debt and other obligations Current portion of operating lease liabilities(a) Operating Lease, Liability, Current Total current liabilities Liabilities, Current Debt and other long-term obligations Operating lease liabilities(a) Operating Lease, Liability, Noncurrent Other long-term liabilities(a) Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies (note 8) Commitments and Contingencies CCIC stockholders' equity: Stockholders' Equity Attributable to Parent [Abstract] Common stock, $0.01 par value; 600 shares authorized; shares issued and outstanding: September 30, 2019—416 and December 31, 2018—415 Common Stock, Value, Issued 6.875% Mandatory Convertible Preferred Stock, Series A, $0.01 par value; 20 shares authorized; shares issued and outstanding: September 30, 2019—2 and December 31, 2018—2; aggregate liquidation value: September 30, 2019—$1,650 and December 31, 2018—$1,650 Preferred Stock, Value, Issued Additional paid-in capital Additional Paid in Capital Accumulated other comprehensive income (loss) Accumulated Other Comprehensive Income (Loss), Net of Tax Dividends/distributions in excess of earnings Retained Earnings (Accumulated Deficit) Total equity Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Total liabilities and equity Liabilities and Equity Statement of Stockholders' Equity [Abstract] Additional Paid-in Capital [Member] Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Dividends/Distributions in Excess of Earnings [Member] Retained Earnings [Member] Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] Noncontrolling Interest [Member] Noncontrolling Interest [Member] Balance, shares Period Start Balance, value Period Start Preferred Stock, Shares Outstanding Period Start Stock-based compensation related activity, net of forfeitures, value Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture Stock-based compensation related activity, net of forfeitures, shares Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture Purchases and retirement of common stock, value Stock Repurchased and Retired During Period, Value Stock Issued During Period, Shares, New Issues Stock Issued During Period, Shares, New Issues Stock Issued During Period, Value, New Issues Stock Issued During Period, Value, New Issues Purchases and retirement of common stock, shares Stock Repurchased and Retired During Period, Shares Common stock dividends/distributions Dividends, Common Stock Net income (loss) Balance, shares Period End Balance, value Period End Preferred Stock, Shares Outstanding Period End General n/a General Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Income Tax Disclosure [Abstract] Income Taxes Income Tax Disclosure [Text Block] Schedule of Long-Term Debt Instruments Schedule of Debt [Table Text Block] Schedule of Maturities of Long-term Debt Schedule of Maturities of Long-term Debt [Table Text Block] Schedule of Extinguishment of Debt [Table Text Block] Schedule of Extinguishment of Debt [Table Text Block] Components of Interest Expense and Amortization of Deferred Financing Costs Schedule Of Interest Expense And Amortization Of Deferred Financing Costs [Text Block] Schedule of interest expense and amortization of deferred financing costs. Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Recent accounting prounouncements New Accounting Pronouncements, Policy [Policy Text Block] Lease, Cost Lease, Cost [Table Text Block] Lease Maturities (5 year table) Lessee, Operating Lease, Liability, Maturity [Table Text Block] Schedule of Rent Expense Schedule of Rent Expense [Table Text Block] Deferred Revenue [Domain] Deferred Revenue [Domain] Other Current Assets [Member] Other Current Assets [Member] Revenue Recognition Non-cancelable Lease Term for Wireless Tenants Revenue Recognition Non-cancelable Lease Term for Wireless Tenants Revenue Recognition Non-cancelable Lease Term for Wireless Tenants Revenue Recognition for Fiber Solutions Tenants Revenue Recognition for Fiber Solutions Tenants Revenue Recognition for Fiber Solutions Tenants Deferred Revenue Deferred Revenue Revenue, Performance Obligation, Description of Payment Terms Revenue, Performance Obligation, Description of Payment Terms Revenue, Remaining Performance Obligation, Amount Revenue, Remaining Performance Obligation, Amount Revenue Recognized on Deferred Revenues Contract with Customer, Liability, Revenue Recognized Contracted Amounts Receivable from Customers, remaining three months Operating Leases, Future Minimum Payments Receivable, Current Contracted Amounts Receivable from Customers, in Two Years Operating Leases, Future Minimum Payments Receivable, in Two Years Contracted Amounts Receivable from Customers, in Three Years Operating Leases, Future Minimum Payments Receivable, in Three Years Contracted Amounts Receivable from Customers, in Four Years Operating Leases, Future Minimum Payments Receivable, in Four Years Contracted Amounts Receivable from Customers, in Five Years Operating Leases, Future Minimum Payments Receivable, in Five Years Contracted Amounts Receivable from Customers, Thereafter Operating Leases, Future Minimum Payments Receivable, Thereafter Contracted Amounts Receivable from Customers, Total Operating Leases, Future Minimum Payments Receivable Subsequent Event [Abstract] Subsequent Event [Abstract] Common Stock [Member] Dividend Paid [Member] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Stock Issued During Period, Shares, Restricted Stock Award, Gross Stock Issued During Period, Shares, Restricted Stock Award, Gross Anti-dilutive securities excluded from dilutive common shares calculation Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Revenue from Contract with Customer [Text Block] Revenue from Contract with Customer [Text Block] General [Abstract] General [Abstract] Net income (loss) attributable to CCIC common stockholders for basic and diluted computations Basic weighted-average number of common stock outstanding Effect of assumed dilution from potential issuance of common shares relating to restricted stock units Weighted Average Number Diluted Shares Outstanding Adjustment Diluted weighted-average number of common shares outstanding Dividends/distributions declared per share of common stock (in dollars per share) Common Stock, Dividends, Per Share, Declared Dividends/distributions declared per share of preferred stock Preferred Stock, Dividends Per Share, Declared Supplemental Disclosure of Cash Flow Information and Non-cash Investing and Financing Activities Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Schedule of Cash, Cash Equivalents and Restricted Cash Schedule of Cash, Cash Equivalents and Restricted Cash [Table Text Block] [Table Text Block] for Schedule of Cash, Cash Equivalents and Restricted Cash [Table]