Debt (Summary Of Long-Term Debt) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Nov. 14, 2011
Debt Instrument [Line Items]
Long-term debt	$ 5,261,029	$ 5,168,226
Less: Current portion	95,098	689,146
Total long-term debt	5,165,931	4,479,080
Loans Payable | U.S. Term Loans
Debt Instrument [Line Items]
Long-term debt	1,203,125	1,250,000	1,250,000
Revolving Credit Facility | Revolving Facility
Debt Instrument [Line Items]
Long-term debt	750,000	0
Convertible Debt | Cash Convertible Notes
Debt Instrument [Line Items]
Long-term debt	914,556	937,160
Convertible Debt | Senior Convertible Notes
Debt Instrument [Line Items]
Long-term debt	0	593,983
Senior Notes | 2017 Senior Notes
Debt Instrument [Line Items]
Long-term debt	550,000	550,000
Senior Notes | 2018 Senior Notes
Debt Instrument [Line Items]
Long-term debt	826,500	818,774
Senior Notes | 2020 Senior Notes
Debt Instrument [Line Items]
Long-term debt	1,014,020	1,014,643
Long Term Debt - Other | Other
Debt Instrument [Line Items]
Long-term debt	$ 2,828	$ 3,666