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Segment Information (Geographic) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Geographic Areas, Revenues from External Customers [Abstract]                      
Revenue United States                 $ 1,322.7 $ 1,487.5 $ 1,402.2
Revenue Japan                 200.0 199.7 305.0
Revenue Other Countries                 149.1 348.2 329.6
Revenue Foreign                 349.1 547.9 634.6
Total revenue $ 462.4 $ 374.5 $ 454.4 $ 380.5 $ 666.4 $ 564.6 $ 459.7 $ 344.7 $ 1,671.8 $ 2,035.4 $ 2,036.8