Long-Term Debt Term Loan (Details) (USD $)	12 Months Ended								1 Months Ended		12 Months Ended					12 Months Ended				12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2011 Revolving Credit Facility [Member]	Dec. 31, 2013 Revolving Credit Facility [Member]		Dec. 31, 2012 Revolving Credit Facility [Member]	Jun. 24, 2011 Revolving Credit Facility [Member]	Jul. 31, 2013 Term Loan [Member]	Apr. 30, 2013 Term Loan [Member]	Dec. 31, 2013 Term Loan [Member]		Apr. 29, 2013 Term Loan [Member]	Dec. 31, 2012 Term Loan [Member]	Dec. 31, 2013 Term Loan [Member] LIBOR [Member]	Dec. 31, 2013 Prior Term Loan Facility [Member]	Dec. 31, 2012 Prior Term Loan Facility [Member]	Dec. 31, 2011 Prior Term Loan Facility [Member]	Mar. 31, 2013 Prior Term Loan Facility [Member]	Dec. 31, 2012 Senior notes due 2015 [Member]	Dec. 31, 2011 Senior notes due 2015 [Member]	Dec. 31, 2013 Senior notes due 2015 [Member]	Mar. 19, 2012 Senior notes due 2015 [Member]	Mar. 05, 2012 Senior notes due 2015 [Member]	Feb. 17, 2012 Senior notes due 2015 [Member]	May 20, 2011 Senior notes due 2015 [Member]	Apr. 13, 2011 Senior notes due 2015 [Member]	Dec. 31, 2013 Net Leverage Ratio, greater than 5.5 [Member] Term Loan [Member]	Dec. 31, 2013 Net Leverage Ratio, less than or equal to 5.5 but greater than 4.5 [Member] Term Loan [Member]	Dec. 31, 2013 Net Leverage Ratio, less than or equal to 4.5 [Member] Term Loan [Member]	Dec. 31, 2013 Minimum [Member] Revolving Credit Facility [Member] ABR [Member]	Dec. 31, 2013 Minimum [Member] Revolving Credit Facility [Member] LIBOR [Member]	Dec. 31, 2013 Minimum [Member] Term Loan [Member] ABR [Member]	Dec. 31, 2013 Minimum [Member] Term Loan [Member] LIBOR [Member]	Apr. 29, 2013 Minimum [Member] Term Loan [Member] LIBOR [Member]	Dec. 31, 2013 Maximum [Member] Revolving Credit Facility [Member] ABR [Member]	Dec. 31, 2013 Maximum [Member] Revolving Credit Facility [Member] LIBOR [Member]	Dec. 31, 2013 Maximum [Member] Term Loan [Member] ABR [Member]	Dec. 31, 2013 Maximum [Member] Term Loan [Member] LIBOR [Member]	Dec. 31, 2013 Maximum, less than or equal to 5.5 [Member] Term Loan [Member]	Dec. 31, 2013 Minimum, greater than 4.5 [Member] Term Loan [Member]	Dec. 31, 2013 Maximum, less than or equal to 4.5 [Member] Term Loan [Member]	Dec. 31, 2013 Interest Rate Cap Purchased During 2011 [Member]	Dec. 31, 2013 Interest Rate Cap Purchased During 2012 [Member]
Debt Instrument [Line Items]
Proceeds from issuance of long-term debt	$ 1,535,200,000	$ 135,700,000	$ 1,175,000,000							$ 1,350,000,000
Line of Credit Facility, Fee on Unused Portion, Basis Points					25
Discount, percent of par									99.25%				99.75%
Debt Instrument, Unamortized Discount									1,400,000		(4,400,000)		3,400,000	0
Deferred Finance Costs, Net								7,200,000	6,100,000
Derivative, Notional Amount	1,150,000,000																																										500,000,000	650,000,000
Deferred financing costs, net	30,100,000	53,200,000	68,500,000
Derivative, Cap Interest Rate																																											3.50%	1.50%
Derivative Asset, Noncurrent	0	100,000
Debt, long-term and short-term	3,251,400,000				0		0				1,528,900,000			1,339,500,000					1,299,500,000	129,000,000		0
Debt Instrument, Repurchased Face Amount																							8,300,000	100,000	120,600,000		665,100,000
Long-term Debt, Weighted Average Interest Rate					0.00%	[1]					3.30%	[1]
Variable Interest Rate Margin															3.25%																1.00%	2.00%	1.25%	2.25%	2.25%	1.50%	2.50%	1.50%	2.50%
Reference Interest Rate Floor																																		1.00%
Gains (Losses) on Extinguishment of Debt	64,000,000	17,200,000	118,900,000	1,600,000							10,300,000							3,200,000		9,400,000	114,100,000
Debt Instrument, Face Amount									190,000,000
Term Loan Mandatory Prepayments, percentage of excess cash flow																												50.00%	25.00%	0.00%
Net leverage ratio											3.8																													5.5	4.5	4.5
Quarterly amortization payment of original principal, Percent											0.25%
Term Loan, Repayments																40,000,000	201,000,000	132,000,000
Senior secured leverage ratio, actual					2.1
Extinguishment of Debt, Fees Paid to Lenders																					97,000,000				7,900,000	37,200,000	59,900,000
Write off of Deferred Debt Issuance Cost	20,100,000	3,000,000																		1,500,000	17,100,000
Extinguishment of Debt, Accrued Interest Paid to Lenders																									$ 5,000,000	$ 4,500,000	$ 36,500,000

[1] Interest rate at December 31, 2013.