Long-Term Debt (Details) (USD $)	3 Months Ended		6 Months Ended			3 Months Ended											6 Months Ended					3 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013	Jun. 30, 2014 Senior Notes Due 2021 [Member]	Jun. 30, 2014 Term loans [Domain]	Jun. 30, 2014 Term Loan B1 [Domain]	Jun. 30, 2014 Term loan B2 [Domain]	Jun. 30, 2014 Letter of Credit [Member]	Jun. 30, 2014 Term B1 due 2016 [Domain]	Dec. 31, 2013 Term B1 due 2016 [Domain]	Jun. 30, 2014 Term B2 due 2020 [Domain]	Dec. 31, 2013 Term B2 due 2020 [Domain]	Jun. 30, 2014 Credit Facility	Dec. 31, 2013 Credit Facility	Jun. 30, 2010 Senior Subordinated Notes Due 2020	Jun. 30, 2014 Senior Subordinated Notes Due 2020	Dec. 31, 2013 Senior Subordinated Notes Due 2020	Jun. 30, 2014 Notes Payable, Other Payables [Member]	Dec. 31, 2013 Notes Payable, Other Payables [Member]	Mar. 31, 2012 Senior Subordinated Notes Due 2022	Jun. 30, 2014 Senior Subordinated Notes Due 2022	Dec. 31, 2013 Senior Subordinated Notes Due 2022	Jun. 30, 2014 Senior Notes due 2021 [Domain]	Dec. 31, 2013 Senior Notes due 2021 [Domain]	Jun. 30, 2014 Senior Notes Due April 2021 [Member]	Dec. 31, 2013 Senior Notes Due April 2021 [Member]
Debt Instrument [Line Items]
Long-term Debt, Gross	$ 4,076,200,000		$ 4,076,200,000		$ 4,355,200,000						$ 0	$ 202,000,000	$ 937,528,000	$ 1,094,500,000	$ 573,618,000	$ 493,600,000		$ 350,000,000	$ 350,000,000	$ 92,700	$ 100,000		$ 325,000,000	$ 325,000,000	$ 850,000,000	$ 850,000,000	$ 1,040,000,000	$ 1,040,000,000
Debt Instrument, Unamortized Discount (Premium), Net	33,300,000		33,300,000		24,900,000						0	(7,708,000)	(23,919,000)	(26,047,000)	0	0		0	0	0	0		0	0	0	0	57,241,000	58,600,000
Long-term Debt	4,109,500,000		4,109,500,000		4,380,100,000						0	194,329,000	913,609,000	1,068,453,000	573,618,000	493,618,000		350,000,000	350,000,000	92,700	110,000		325,000,000	325,000,000	850,000,000	850,000,000	1,097,241,000	1,098,495,000
Long Term Debt, Current Maturity, Outstanding Principal	(11,006,000)		(11,006,000)		(16,006,000)
Long Term Debt, Current Maturities, Unamortized Discount Premium	0		0		0
Long-term Debt, Current Maturities	(11,006,000)		(11,006,000)		(16,006,000)
Long Term Debt, Excluding Current Maturities, Outstanding Principal	4,065,200,000		4,065,200,000		4,339,200,000
Long Term Debt, Excluding Current Maturities, Unamortized Discount Premium	33,300,000		33,300,000		24,900,000
Long-term debt less current portion	4,098,556,000		4,098,556,000		4,364,045,000
Credit Facility, Maximum Borrowing Capacity							1,600,000,000	500,000,000	1,100,000,000
Line Of Credit, Revolving Credit Commitment	1,000,000,000		1,000,000,000
Letter of Credit, amount outstanding										12,700,000
Debt Instrument, Face Amount																		350,000,000					325,000,000				1,040,000,000
Debt Instrument, Interest Rate, Stated Percentage						6.375%												8.75%					7.75%				7.50%
Premium Included In Recorded Fair Value Of Senior Notes																											72,800,000
Proceeds from issuance of debt						835,000,000											341,500,000					318,000,000
Interest expense	62,900,000	29,200,000	131,500,000	58,300,000
Interest income	(100,000)	(100,000)	(200,000)	(200,000)
Capitalized interest	(800,000)	(800,000)	(2,500,000)	(1,200,000)
Interest expense, net	62,003,000	28,327,000	128,792,000	56,920,000
Loss on early extinguishment of debt	$ 8,234,000	$ 0	$ 8,234,000	$ 0