Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Consolidated Statements of Comprehensive Income (Unaudited) [Abstract]        
Gain from change in pension obligations, Tax $ 0.1 $ 0 $ (0.1) $ (1.3)
Net gain (loss) on cash flow hedges, Tax $ (0.7) $ 0.1 $ (1.5) $ (1.0)