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Segment Information (Geographic) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Geographic Areas, Revenues from External Customers [Abstract]                      
Revenue United States                 $ 1,584.2 $ 1,322.7 $ 1,487.5
Revenue Japan                 183.7 200.0 199.7
Revenue Other Countries                 150.2 149.1 348.2
Revenue Foreign                 333.9 349.1 547.9
Total revenue $ 421.3 $ 570.5 $ 364.8 $ 561.5 $ 462.4 $ 374.5 $ 454.4 $ 380.5 $ 1,918.1 $ 1,671.8 $ 2,035.4