Condensed Consolidating Financial Information of Guarantors and Issuers - Condensed Consolidating Statement of Cash Flows (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	$ (47.3)	$ 143.3
Cash flows from investing activities
Acquisitions of property and equipment, net of change in related payables	(148.1)	(82.7)
Change in restricted cash	831.7	70.2
Return of investment in subsidiary		0
Investments in/advances to non-consolidated affiliates	(21.9)	(0.2)
Purchase of additional interests in subsidiaries	0	0
Dividends received	0
Purchases of investment securities	(1.4)	(4.9)
Proceeds from the sale and maturity of investment securities	0.7	0.2
Other	(3.2)	2.6
Cash flows used in investing activities	657.8	(14.8)
Cash flows from financing activities
Proceeds from the issuance of long-term debt	1,589.5	1,643.6
Assumption of debt issued by non-guarantors	0
Debt issuance costs and fees	(47.3)	(30.6)
Borrowings under lending agreements	0	453.0
Repayments under lending agreements	0	(608.0)
Cash paid for early extinguishments of debt	(1,784.2)	(1,397.3)
Cash paid for loan maturity extension fees	(23.3)	0
Scheduled debt retirements	(2.5)	(3.8)
Dividends paid	0
Purchase of additional interests in subsidiary	0	(9.6)
Non-controlling interest distributions, net of contributions	0	28.9
Issuance of common stock, net of fees	0	17.2
Other	(5.8)	(7.5)
Transfer (to)/from affiliates	0	0
Cash flows provided by financing activities	(273.6)	85.9
Cash flows from discontinued operations
Cash flows from operating activities	1.1	16.1
Cash flows from investing activities	0	(0.2)
Net cash provided by discontinued operations	1.1	15.9
Net increase/(decrease) in cash and cash equivalents	338.0	230.3
Change in cash classified as assets held for sale	(0.1)	1.0
Cash and cash equivalents, beginning of period	1,757.5	891.2
Cash and cash equivalents, end of period	2,095.4	1,122.5
CEC (Parent Guarantor) [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	56.0	95.8
Cash flows from investing activities
Acquisitions of property and equipment, net of change in related payables	0	0
Change in restricted cash	0	0
Return of investment in subsidiary		0
Investments in/advances to non-consolidated affiliates	0	0
Purchase of additional interests in subsidiaries	(20.4)	(71.8)
Dividends received	0
Purchases of investment securities	0	0
Proceeds from the sale and maturity of investment securities	0	0
Other	(0.2)	0
Cash flows used in investing activities	(20.6)	(71.8)
Cash flows from financing activities
Proceeds from the issuance of long-term debt	0	0
Assumption of debt issued by non-guarantors	0
Debt issuance costs and fees	0	0
Borrowings under lending agreements		0
Repayments under lending agreements		0
Cash paid for early extinguishments of debt	0	0
Cash paid for loan maturity extension fees	0
Scheduled debt retirements	0	0
Dividends paid	0
Purchase of additional interests in subsidiary		0
Non-controlling interest distributions, net of contributions		0
Issuance of common stock, net of fees		17.2
Other	0	0
Transfer (to)/from affiliates	38.0	(34.0)
Cash flows provided by financing activities	38.0	(16.8)
Cash flows from discontinued operations
Cash flows from operating activities	0	0
Cash flows from investing activities	0	0
Net cash provided by discontinued operations	0	0
Net increase/(decrease) in cash and cash equivalents	73.4	7.2
Change in cash classified as assets held for sale	0	0
Cash and cash equivalents, beginning of period	7.4	3.9
Cash and cash equivalents, end of period	80.8	11.1
Subsidiary Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	(121.0)	193.8
Cash flows from investing activities
Acquisitions of property and equipment, net of change in related payables	(2.1)	(0.6)
Change in restricted cash	0	0
Return of investment in subsidiary		0
Investments in/advances to non-consolidated affiliates	0	0
Purchase of additional interests in subsidiaries	(1.5)	0
Dividends received	18.6
Purchases of investment securities	0	0
Proceeds from the sale and maturity of investment securities	0	0
Other	0	0
Cash flows used in investing activities	15.0	(0.6)
Cash flows from financing activities
Proceeds from the issuance of long-term debt	127.0	1,313.6
Assumption of debt issued by non-guarantors	2,199.4
Debt issuance costs and fees	(47.3)	(23.3)
Borrowings under lending agreements		453.0
Repayments under lending agreements		(608.0)
Cash paid for early extinguishments of debt	(1,783.3)	(1,095.6)
Cash paid for loan maturity extension fees	0
Scheduled debt retirements	(2.5)	(3.8)
Dividends paid	0
Purchase of additional interests in subsidiary		0
Non-controlling interest distributions, net of contributions		0
Issuance of common stock, net of fees		0
Other	0	0
Transfer (to)/from affiliates	(15.3)	110.2
Cash flows provided by financing activities	478.0	146.1
Cash flows from discontinued operations
Cash flows from operating activities	0	0
Cash flows from investing activities	0	0
Net cash provided by discontinued operations	0	0
Net increase/(decrease) in cash and cash equivalents	372.0	339.3
Change in cash classified as assets held for sale	0	0
Cash and cash equivalents, beginning of period	911.9	16.6
Cash and cash equivalents, end of period	1,283.9	355.9
Subsidiary Guarantors of Parent and Subsidiary Guaranteed Debt [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	31.4	(137.2)
Cash flows from investing activities
Acquisitions of property and equipment, net of change in related payables	(76.4)	(27.0)
Change in restricted cash	(5.1)	0
Return of investment in subsidiary		92.5
Investments in/advances to non-consolidated affiliates	0	0
Purchase of additional interests in subsidiaries	0	0
Dividends received	18.6
Purchases of investment securities	0	0
Proceeds from the sale and maturity of investment securities	0	0
Other	(2.0)	(1.4)
Cash flows used in investing activities	(64.9)	64.1
Cash flows from financing activities
Proceeds from the issuance of long-term debt	0	0
Assumption of debt issued by non-guarantors	0
Debt issuance costs and fees	0	0
Borrowings under lending agreements		0
Repayments under lending agreements		0
Cash paid for early extinguishments of debt	0	0
Cash paid for loan maturity extension fees	0
Scheduled debt retirements	0	0
Dividends paid	(18.6)
Purchase of additional interests in subsidiary		(9.6)
Non-controlling interest distributions, net of contributions		0
Issuance of common stock, net of fees		0
Other	(1.7)	(6.7)
Transfer (to)/from affiliates	(0.1)	0
Cash flows provided by financing activities	(20.4)	(16.3)
Cash flows from discontinued operations
Cash flows from operating activities	(0.4)	18.9
Cash flows from investing activities	0	(0.2)
Net cash provided by discontinued operations	(0.4)	18.7
Net increase/(decrease) in cash and cash equivalents	(54.3)	(70.7)
Change in cash classified as assets held for sale	0	1.3
Cash and cash equivalents, beginning of period	353.8	372.5
Cash and cash equivalents, end of period	299.5	303.1
Subsidiary Non-Guarantors of Parent and Subsidiary Guaranteed Debt [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	(9.9)	(9.1)
Cash flows from investing activities
Acquisitions of property and equipment, net of change in related payables	(73.4)	(55.1)
Change in restricted cash	836.8	70.2
Return of investment in subsidiary		0
Investments in/advances to non-consolidated affiliates	(21.9)	(0.2)
Purchase of additional interests in subsidiaries	0	0
Dividends received	0
Purchases of investment securities	(1.4)	(4.9)
Proceeds from the sale and maturity of investment securities	0.7	0.2
Other	(1.0)	4.0
Cash flows used in investing activities	739.8	14.2
Cash flows from financing activities
Proceeds from the issuance of long-term debt	1,462.5	330.0
Assumption of debt issued by non-guarantors	(2,199.4)
Debt issuance costs and fees	0	(7.3)
Borrowings under lending agreements		0
Repayments under lending agreements		0
Cash paid for early extinguishments of debt	(0.9)	(301.7)
Cash paid for loan maturity extension fees	(23.3)
Scheduled debt retirements	0	0
Dividends paid	(18.6)
Purchase of additional interests in subsidiary		0
Non-controlling interest distributions, net of contributions		28.9
Issuance of common stock, net of fees		0
Other	(4.1)	(0.8)
Transfer (to)/from affiliates	(0.7)	(96.9)
Cash flows provided by financing activities	(784.5)	(47.8)
Cash flows from discontinued operations
Cash flows from operating activities	1.5	1.2
Cash flows from investing activities	0	0
Net cash provided by discontinued operations	1.5	1.2
Net increase/(decrease) in cash and cash equivalents	(53.1)	(41.5)
Change in cash classified as assets held for sale	(0.1)	(0.3)
Cash and cash equivalents, beginning of period	484.4	498.2
Cash and cash equivalents, end of period	431.2	456.4
Subsidiary Non-Guarantors of Parent-Only Guaranteed Debt [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	21.5	(146.3)
Cash flows from investing activities
Acquisitions of property and equipment, net of change in related payables	(149.8)	(82.1)
Change in restricted cash	831.7	70.2
Return of investment in subsidiary		92.5
Investments in/advances to non-consolidated affiliates	(21.9)	(0.2)
Purchase of additional interests in subsidiaries	0	0
Dividends received	18.6
Purchases of investment securities	(1.4)	(4.9)
Proceeds from the sale and maturity of investment securities	0.7	0.2
Other	(3.0)	2.6
Cash flows used in investing activities	674.9	78.3
Cash flows from financing activities
Proceeds from the issuance of long-term debt	1,462.5	330.0
Assumption of debt issued by non-guarantors	(2,199.4)
Debt issuance costs and fees	0	(7.3)
Borrowings under lending agreements		0
Repayments under lending agreements		0
Cash paid for early extinguishments of debt	(0.9)	(301.7)
Cash paid for loan maturity extension fees	(23.3)
Scheduled debt retirements	0	0
Dividends paid	(37.2)
Purchase of additional interests in subsidiary		(9.6)
Non-controlling interest distributions, net of contributions		28.9
Issuance of common stock, net of fees		0
Other	(5.8)	(7.5)
Transfer (to)/from affiliates	(0.8)	(96.9)
Cash flows provided by financing activities	(804.9)	(64.1)
Cash flows from discontinued operations
Cash flows from operating activities	1.1	20.1
Cash flows from investing activities	0	(0.2)
Net cash provided by discontinued operations	1.1	19.9
Net increase/(decrease) in cash and cash equivalents	(107.4)	(112.2)
Change in cash classified as assets held for sale	(0.1)	1.0
Cash and cash equivalents, beginning of period	838.2	870.7
Cash and cash equivalents, end of period	730.7	759.5
Consolidating/ Eliminating Adjustments [Member]
Condensed Financial Statements, Captions [Line Items]
Cash flows from operating activities	(3.8)	0
Cash flows from investing activities
Acquisitions of property and equipment, net of change in related payables	3.8	0
Change in restricted cash	0	0
Return of investment in subsidiary		(92.5)
Investments in/advances to non-consolidated affiliates	0	0
Purchase of additional interests in subsidiaries	21.9	71.8
Dividends received	(37.2)
Purchases of investment securities	0	0
Proceeds from the sale and maturity of investment securities	0	0
Other	0	0
Cash flows used in investing activities	(11.5)	(20.7)
Cash flows from financing activities
Proceeds from the issuance of long-term debt	0	0
Assumption of debt issued by non-guarantors	0
Debt issuance costs and fees	0	0
Borrowings under lending agreements		0
Repayments under lending agreements		0
Cash paid for early extinguishments of debt	0	0
Cash paid for loan maturity extension fees	0
Scheduled debt retirements	0	0
Dividends paid	37.2
Purchase of additional interests in subsidiary		0
Non-controlling interest distributions, net of contributions		0
Issuance of common stock, net of fees		0
Other	0	0
Transfer (to)/from affiliates	(21.9)	20.7
Cash flows provided by financing activities	15.3	20.7
Cash flows from discontinued operations
Cash flows from operating activities	0	(4.0)
Cash flows from investing activities	0	0
Net cash provided by discontinued operations	0	(4.0)
Net increase/(decrease) in cash and cash equivalents	0	(4.0)
Change in cash classified as assets held for sale	0	0
Cash and cash equivalents, beginning of period	0	0
Cash and cash equivalents, end of period	$ 0	$ (4.0)