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Acquisition-related Intangible Assets (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Definite-Lived Intangible Assets [Line Items]    
Definite-Lived Intangible Assets, Gross $ 9,694.4 $ 9,637.2
Accumulated Amortization (3,525.9) (3,169.3)
Definite-Lived Intangible Assets, Net 6,168.5 6,467.9
Indefinite-lived Intangible Assets by Major Class [Line Items]    
Indefinite-Lived Intangible Assets 1,348.0 1,348.0
Acquisition-related Intangible Assets, Gross 11,042.4 10,985.2
Acquisition-related Intangible Assets, net of Accumulated Amortization 7,516.5 7,815.9
Definite-Lived Intangible Assets, Future Amortization Expense [Abstract]    
Definite-Lived Intangible Assets, Net $ 6,168.5 $ 6,467.9