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Debt and Other Obligations (Textuals) (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Debt Instrument [Line Items]        
Total debt and other obligations $ 11,920,861,000us-gaap_DebtAndCapitalLeaseObligations $ 11,594,500,000us-gaap_DebtAndCapitalLeaseObligations    
Extinguishment of Debt, Amount 800,000,000us-gaap_ExtinguishmentOfDebtAmount 726,992,000us-gaap_ExtinguishmentOfDebtAmount 1,894,847,000us-gaap_ExtinguishmentOfDebtAmount  
Principal balance outstanding on debt instruments 11,921,194,000us-gaap_DebtInstrumentCarryingAmount      
Cash and equivalents 175,620,000us-gaap_CashAndCashEquivalentsAtCarryingValue 223,394,000us-gaap_CashAndCashEquivalentsAtCarryingValue 441,364,000us-gaap_CashAndCashEquivalentsAtCarryingValue 80,120,000us-gaap_CashAndCashEquivalentsAtCarryingValue
Debt Instrument, Covenant Description 7.0 to 1.0      
WCP Securitized Notes [Member]        
Debt Instrument [Line Items]        
Interest rate, increase (decrease) 5.00%us-gaap_DebtInstrumentInterestRateIncreaseDecrease
/ us-gaap_LongtermDebtTypeAxis
= cci_WcpSecuritizedNotesMember		      
Extinguishment of Debt, Amount     16,911,000us-gaap_ExtinguishmentOfDebtAmount
/ us-gaap_LongtermDebtTypeAxis
= cci_WcpSecuritizedNotesMember		  
Effective yield rate, inclusive of purchase price adjustments 5.60%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_LongtermDebtTypeAxis
= cci_WcpSecuritizedNotesMember		      
Variable Rate Revolver [Member]        
Debt Instrument [Line Items]        
Availability on revolver 805,000,000us-gaap_DebtInstrumentUnusedBorrowingCapacityAmount
/ us-gaap_LongtermDebtTypeAxis
= cci_VariableRateRevolverMember		      
Variable Rate Revolver 2012 [Member]        
Debt Instrument [Line Items]        
Debt instrument credit spread LIBOR rate minimum 1.50%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMinimum
/ us-gaap_LongtermDebtTypeAxis
= cci_VariableRateRevolver2012Member		      
Effective Percentage Rate Range, Maximum 2.25%us-gaap_DebtInstrumentInterestRateEffectivePercentageRateRangeMaximum
/ us-gaap_LongtermDebtTypeAxis
= cci_VariableRateRevolver2012Member		      
Fixed Rate Securitized Debt 2010 Tower Revenue Notes [Member]        
Debt Instrument [Line Items]        
Interest rate, increase (decrease) 5.00%us-gaap_DebtInstrumentInterestRateIncreaseDecrease
/ us-gaap_LongtermDebtTypeAxis
= cci_FixedRateSecuritizedDebt2010TowerRevenueNotesMember		      
Fixed Rate Securitized Debt January 2010 Tower Revenue Notes First Tranche [Member]        
Debt Instrument [Line Items]        
Extinguishment of Debt, Amount 300,000,000us-gaap_ExtinguishmentOfDebtAmount
/ us-gaap_LongtermDebtTypeAxis
= cci_FixedRateSecuritizedDebtJanuary2010TowerRevenueNotesFirstTrancheMember		      
Fixed Rate Securitized Debt January 2010 Tower Revenue Notes Second Tranche [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount 350,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= cci_FixedRateSecuritizedDebtJanuary2010TowerRevenueNotesSecondTrancheMember		      
Fixed Rate Securitized Debt January 2010 Tower Revenue Notes Third Tranche [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount 1,300,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= cci_FixedRateSecuritizedDebtJanuary2010TowerRevenueNotesThirdTrancheMember		      
Fixed Rate Securitized Debt August 2010 Tower Revenue Notes First Tranche [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount 250,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= cci_FixedRateSecuritizedDebtAugust2010TowerRevenueNotesFirstTrancheMember		      
Fixed Rate Securitized Debt August 2010 Tower Revenue Notes Second Tranche [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount 300,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= cci_FixedRateSecuritizedDebtAugust2010TowerRevenueNotesSecondTrancheMember		      
Fixed Rate Securitized Debt August 2010 Tower Revenue Notes Third Tranche [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount 1,000,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LongtermDebtTypeAxis
= cci_FixedRateSecuritizedDebtAugust2010TowerRevenueNotesThirdTrancheMember		      
Capital Lease Obligations and Other [Member]        
Debt Instrument [Line Items]        
Total debt and other obligations 175,175,000us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= cci_CapitalLeaseObligationsAndOtherMember		 129,585,000us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_LongtermDebtTypeAxis
= cci_CapitalLeaseObligationsAndOtherMember		    
Stated Percentage Rate Range, Maximum 10.00%us-gaap_DebtInstrumentInterestRateStatedPercentageRateRangeMaximum
/ us-gaap_LongtermDebtTypeAxis
= cci_CapitalLeaseObligationsAndOtherMember		      
Contractual maturity date, start 1 year      
Contractual maturity date, end 25 years      
High Yield Bonds - Senior Notes [Member]        
Debt Instrument [Line Items]        
Redemption pricing percentage of principal amount   100.00%cci_RedemptionPricingPercentageOfPrincipalAmount
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorDebtObligationsMember		    
Collateralized [Member]        
Debt Instrument [Line Items]        
Debt Instrument, PPE Collaterized Amount 1,200,000,000us-gaap_DebtInstrumentCollateralAmount
/ us-gaap_StatementScenarioAxis
= cci_CollateralizedMember		      
CCOC [Member] | Incremental Term Loan B [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount 800,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LineOfCreditFacilityAxis
= cci_CcocMember
/ us-gaap_LongtermDebtTypeAxis
= cci_IncrementalTermLoanBMember		      
CCOC [Member] | Incremental Term Loan B2 [Member] [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount 500,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LineOfCreditFacilityAxis
= cci_CcocMember
/ us-gaap_LongtermDebtTypeAxis
= cci_IncrementalTermLoanB2MemberMember		      
CCOC [Member] | Incremental Term Loan A2 [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount 200,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_LineOfCreditFacilityAxis
= cci_CcocMember
/ us-gaap_LongtermDebtTypeAxis
= cci_IncrementalTermLoanA2Member		      
2012 secured notes tranche A [Member]        
Debt Instrument [Line Items]        
Total debt and other obligations 500,000,000us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_DebtInstrumentAxis
= cci_A2012SecuredNotesTrancheMember		      
2012 Credit Facility [Member] | CCOC [Member] | Senior Secured Term Loan A [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount 500,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= cci_A2012CreditFacilityMember
/ us-gaap_LineOfCreditFacilityAxis
= cci_CcocMember
/ us-gaap_LongtermDebtTypeAxis
= cci_SeniorSecuredTermLoanMember		      
2012 Credit Facility [Member] | CCOC [Member] | Senior Secured Term Loan B [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount 1,600,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= cci_A2012CreditFacilityMember
/ us-gaap_LineOfCreditFacilityAxis
= cci_CcocMember
/ us-gaap_LongtermDebtTypeAxis
= cci_SeniorSecuredTermLoanBMember		      
2012 Credit Facility [Member] | CCOC [Member] | Senior Secured 2012 Revolver [Member]        
Debt Instrument [Line Items]        
Total revolving commitment 1,500,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= cci_A2012CreditFacilityMember
/ us-gaap_LineOfCreditFacilityAxis
= cci_CcocMember
/ us-gaap_LongtermDebtTypeAxis
= cci_SeniorSecured2012RevolverMember		      
High Yield Bonds [Member]        
Debt Instrument [Line Items]        
Total debt and other obligations 3,996,031,000us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_DebtInstrumentAxis
= cci_HighYieldBondsMember		 3,648,302,000us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_DebtInstrumentAxis
= cci_HighYieldBondsMember		    
High Yield Bonds [Member] | Fixed Rate High Yield Bonds 7Point125 Percent Senior Notes [Member]        
Debt Instrument [Line Items]        
Total debt and other obligations 0us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_DebtInstrumentAxis
= cci_HighYieldBondsMember
/ us-gaap_LongtermDebtTypeAxis
= cci_FixedRateHighYieldBonds7Point125PercentSeniorNotesMember		 498,332,000us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_DebtInstrumentAxis
= cci_HighYieldBondsMember
/ us-gaap_LongtermDebtTypeAxis
= cci_FixedRateHighYieldBonds7Point125PercentSeniorNotesMember		    
Repayments of Debt 500,000,000us-gaap_RepaymentsOfDebt
/ us-gaap_DebtInstrumentAxis
= cci_HighYieldBondsMember
/ us-gaap_LongtermDebtTypeAxis
= cci_FixedRateHighYieldBonds7Point125PercentSeniorNotesMember		      
High Yield Bonds [Member] | 4.875% Senior Notes [Member]        
Debt Instrument [Line Items]        
Total debt and other obligations 846,060,000us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_DebtInstrumentAxis
= cci_HighYieldBondsMember
/ us-gaap_LongtermDebtTypeAxis
= cci_A4.875SeniorNotesMember		      
Debt Instrument, Face Amount 850,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= cci_HighYieldBondsMember
/ us-gaap_LongtermDebtTypeAxis
= cci_A4.875SeniorNotesMember		      
Stated interest rate 4.88%us-gaap_DebtInstrumentInterestRateStatedPercentage
/ us-gaap_DebtInstrumentAxis
= cci_HighYieldBondsMember
/ us-gaap_LongtermDebtTypeAxis
= cci_A4.875SeniorNotesMember		 [1]      
Issuance of debt obligation [Member] | 4.875% Senior Notes [Member]        
Debt Instrument [Line Items]        
Proceeds from Issuance of Debt 839,000,000us-gaap_ProceedsFromIssuanceOfDebt
/ us-gaap_DebtInstrumentAxis
= cci_IssuanceofdebtobligationMember
/ us-gaap_LongtermDebtTypeAxis
= cci_A4.875SeniorNotesMember		      
2012 Revolver [Member] | Collateralized [Member]        
Debt Instrument [Line Items]        
Cash and equivalents 41,400,000us-gaap_CashAndCashEquivalentsAtCarryingValue
/ us-gaap_DebtInstrumentAxis
= cci_A2012RevolverMember
/ us-gaap_StatementScenarioAxis
= cci_CollateralizedMember		      
2012 secured notes tranche B [Member]        
Debt Instrument [Line Items]        
Total debt and other obligations 1,000,000,000us-gaap_DebtAndCapitalLeaseObligations
/ us-gaap_DebtInstrumentAxis
= cci_A2012SecuredNotesTrancheBMember		      
Minimum [Member] | High Yield Bonds - Senior Notes [Member]        
Debt Instrument [Line Items]        
Debt to Adjusted Cash Flow Ratio 7.0cci_DebttoAdjustedCashFlowRatio
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorDebtObligationsMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		      
2012 Revolver borrowing capacity [Member] | 2012 Revolver [Member]        
Debt Instrument [Line Items]        
Debt Instrument, Face Amount 2,200,000,000us-gaap_DebtInstrumentFaceAmount
/ us-gaap_DebtInstrumentAxis
= cci_A2012RevolverMember
/ us-gaap_SubsequentEventTypeAxis
= cci_A2012RevolverborrowingcapacityMember		      
Tendered After the Early Tender Date [Member] | Fixed Rate High Yield Bonds 9 Percent Senior Notes [Member]        
Debt Instrument [Line Items]        
Tender Offer Amount 313,300,000cci_TenderOfferAmount
/ us-gaap_DebtInstrumentAxis
= cci_FixedRateHighYieldBonds9PercentSeniorNotesMember
/ cci_TenderDateAxis
= cci_TenderedAfterEarlyTenderDateMember		      
Amount redeemed after tender [Member] | Fixed Rate - High Yield Bonds, 7.75% Secured Notes [Member]        
Debt Instrument [Line Items]        
Repayments of Debt   294,400,000us-gaap_RepaymentsOfDebt
/ us-gaap_DebtInstrumentAxis
= cci_FixedRateHighYieldBonds7Point75PercentSecuredNotesMember
/ cci_TenderOfferAttributeAxis
= cci_AmountRedeemedAfterTenderMember		    
Amount redeemed after tender [Member] | Fixed Rate High Yield Bonds 9 Percent Senior Notes [Member]        
Debt Instrument [Line Items]        
Tender Offer Amount 800,000cci_TenderOfferAmount
/ us-gaap_DebtInstrumentAxis
= cci_FixedRateHighYieldBonds9PercentSeniorNotesMember
/ cci_TenderOfferAttributeAxis
= cci_AmountRedeemedAfterTenderMember		      
Amount validly tendered [Member] | Fixed Rate - High Yield Bonds, 7.75% Secured Notes [Member]        
Debt Instrument [Line Items]        
Tender Offer Amount 670,600,000cci_TenderOfferAmount
/ us-gaap_DebtInstrumentAxis
= cci_FixedRateHighYieldBonds7Point75PercentSecuredNotesMember
/ cci_TenderOfferAttributeAxis
= cci_AmountValidlyTenderedMember		      
Amount validly tendered [Member] | Fixed Rate High Yield Bonds 9 Percent Senior Notes [Member]        
Debt Instrument [Line Items]        
Tender Offer Amount $ 515,500,000cci_TenderOfferAmount
/ us-gaap_DebtInstrumentAxis
= cci_FixedRateHighYieldBonds9PercentSeniorNotesMember
/ cci_TenderOfferAttributeAxis
= cci_AmountValidlyTenderedMember		      
[1] Represents the weighted-average stated interest rate.