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Debt (4.0% Convertible Senior Notes due 2014 - Carrying Value Of Debt) (Details) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Principal Balance	$ 6,872,120,000	$ 5,910,041,000
Carrying Value	6,859,091,000	5,876,607,000
4.0% Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Principal Balance	378,370,000	499,944,000
Debt discount	(8,170,000)	(31,550,000)
Carrying Value	$ 370,200,000	$ 468,394,000

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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