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Income Taxes (Details) (USD $)
In Millions
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2011
Income Taxes [Abstract]  
Balance at December 31, 2010 $ 157.1
Additions for tax positions of the current year 4.6
Additions for tax positions of the prior year 1.0
Reductions for tax positions of prior years (20.2)
Settlements during the year (1.8)
Lapses of applicable statutes of limitations (58.1)
Foreign exchange and other (0.2)
Balance at September 30, 201182.482.4
Reserves reversed due to expiration of federal statutes of limitations68.878.3
Amount of unrecognized tax benefit that will decrease within 12 months$ 26.7$ 26.7