Debt (Summary Of Long-Term Debt) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Nov. 30, 2011
Debt Instrument [Line Items]
Long-term debt	$ 5,001,595	$ 5,168,226
Less: Current portion	95,224	689,146
Total long-term debt	4,906,371	4,479,080
Revolving Facility [Member]
Debt Instrument [Line Items]
Long-term debt	385,000
U.S. Term Loans [Member]
Debt Instrument [Line Items]
Long-term debt	1,226,563	1,250,000	1,250,000
Cash Convertible Notes [Member]
Debt Instrument [Line Items]
Long-term debt	994,329	937,160
Senior Convertible Notes [Member]
Debt Instrument [Line Items]
Long-term debt		593,983
2017 Senior Notes [Member]
Debt Instrument [Line Items]
Long-term debt	550,000	550,000
2018 Senior Notes [Member]
Debt Instrument [Line Items]
Long-term debt	827,923	818,774
2020 Senior Notes [Member]
Debt Instrument [Line Items]
Long-term debt	1,014,332	1,014,643
Other [Member]
Debt Instrument [Line Items]
Long-term debt	$ 3,448	$ 3,666