Comprehensive Income (loss) (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Comprehensive Income (Loss) (Textual) [Abstract]
Pension and OPEB liability adjustments during the period, tax amount	$ (6.5)	$ (5.7)
Gain (loss) on cash flow hedges, Tax amount	(16.2)	(22.7)
Deferred taxes of cumulative unrealized foreign currency translation gains	(1.5)		(1.5)
Deferred taxes of pension/OPEB liability	610.6		617.1
Deferred taxes for accumulated gain (loss) on cash flow hedges	$ (12.1)		$ 4.1