Debt Schedule of Long Term Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Carrying amount on long-term debt	$ 4,789,150	$ 4,663,531
Current portion of long-term debt	(70,235)	(52,095)
Long-term Debt, net of current portion	4,718,915	4,611,436
Revolving Credit Facility
Debt Instrument [Line Items]
Carrying amount on long-term debt	834,753	883,428
Fair Value	834,753	883,428
Term Loan Facility
Debt Instrument [Line Items]
Carrying amount on long-term debt	248,125	249,375
Fair Value	248,125	249,375
6 3/4% Notes
Debt Instrument [Line Items]
Carrying amount on long-term debt	284,243	308,616
Fair Value	$ 283,702	$ 309,634
Stated interest rate (as a percent)	6.75%	6.75%
The 7 3/4% Notes
Debt Instrument [Line Items]
Carrying amount on long-term debt	$ 400,000	$ 400,000
Fair Value	$ 421,240	$ 429,000
Stated interest rate (as a percent)	7.75%	7.75%
The 8 3/8% Notes
Debt Instrument [Line Items]
Carrying amount on long-term debt	$ 106,047	$ 106,030
Fair Value	$ 109,831	$ 110,500
Stated interest rate (as a percent)	8.375%	8.375%
Senior Subsidiary Notes
Debt Instrument [Line Items]
Carrying amount on long-term debt	$ 160,950	$ 172,420
Fair Value	$ 165,376	$ 175,437
Stated interest rate (as a percent)	6.125%	6.125%
GBP Senior Notes 6.125 Percent, Due 2022
Debt Instrument [Line Items]
Carrying amount on long-term debt	$ 629,100	$ 622,960
Fair Value	$ 644,010	639,282
Stated interest rate (as a percent)	6.125%
6% Notes
Debt Instrument [Line Items]
Carrying amount on long-term debt	$ 600,000	600,000
Fair Value	$ 624,000	$ 625,500
Stated interest rate (as a percent)	6.00%	6.00%
The 5 3/4% Notes
Debt Instrument [Line Items]
Carrying amount on long-term debt	$ 1,000,000	$ 1,000,000
Fair Value	$ 1,002,500	$ 1,005,000
Stated interest rate (as a percent)	5.75%	5.75%
Accounts Receivable Securitization Program
Debt Instrument [Line Items]
Carrying amount on long-term debt	$ 217,500	$ 0
Fair Value	217,500	0
Real Estate Mortgages, Capital Leases and Other
Debt Instrument [Line Items]
Carrying amount on long-term debt	308,432	320,702
Fair Value	308,432	$ 320,702
USD \| Revolving Credit Facility
Debt Instrument [Line Items]
Carrying amount on long-term debt	$ 631,900

Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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