Long-Term and Other Debt - Credit Facilities (Details) (USD $)	3 Months Ended	12 Months Ended					0 Months Ended							0 Months Ended
	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Other assets	Oct. 18, 2013 Senior Secured Credit Facilities [Member]	Oct. 18, 2013 Senior Secured Credit Facilities [Member] LIBOR	Oct. 18, 2013 Senior Secured Credit Facilities [Member] Base rate	Oct. 18, 2013 Revolver Revolver, varying interest rate, due 2018	Oct. 18, 2013 Revolver Revolver, varying interest rate, due 2018 Minimum	Oct. 18, 2013 Revolver Revolver, varying interest rate, due 2018 Maximum	Oct. 18, 2013 Revolver Revolver, varying interest rate, due 2018 Letter of credit	Oct. 18, 2013 Term Loan Term Loan, varying interest rate, due 2020	Oct. 18, 2013 Term Loan Term Loan, varying interest rate, due 2020 LIBOR	Oct. 18, 2013 Term Loan Term Loan, varying interest rate, due 2020 Base rate
Debt Instrument
Maximum revolving commitments						$ 2,600,000,000			$ 300,000,000.0			$ 200,000,000.0	$ 2,300,000,000
Amortization percentage													1.00%
Variable rate floor							1.00%	2.00%
Basis spread on variable interest rate									3.00%					3.25%	2.25%
Basis spread on variable rate, reduction percentage										0.25%	0.50%
Unused capacity, commitment fee percentage									0.50%
Unused capacity, commitment fee, step-down percentage									0.375%
Prepayment premium percentage									1.00%
Commitment percentage									15.00%
Deferred financing fees					92,100,000
Early extinguishment of debt	$ 5,900,000	$ 5,900,000	$ 15,500,000	$ 4,200,000