Debt (Summary Of Long-Term Debt) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Nov. 14, 2011
Debt Instrument [Line Items]
Long-term debt	$ 5,773,716	$ 5,431,948
Long-term debt, current maturities	101,574	94,752
Long-term debt, excluding current maturities	5,672,142	5,337,196
Revolving Facility
Debt Instrument [Line Items]
Long-term debt	310,000	0
Loans Payable | U.S. Term Loans
Debt Instrument [Line Items]
Long-term debt	1,132,813	1,156,250	1,250,000
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	822,008	826,974
Senior Notes | 2020 Senior Notes
Debt Instrument [Line Items]
Long-term debt	1,013,038	1,013,372
Senior Notes | 2023 Senior Notes
Debt Instrument [Line Items]
Long-term debt	748,484	748,452
Convertible Debt | Cash Convertible Notes
Debt Instrument [Line Items]
Long-term debt	1,197,241	1,136,768
Other
Debt Instrument [Line Items]
Long-term debt	$ 132	$ 132