Accumulated Other Comprehensive Income/(Loss) Reclassifications out of Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Sep. 30, 2013
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, before Tax	$ 3.7			$ (2.0)
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Tax	(1.4)			0.8
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Net of Tax	(2.3)	1.0	2.6	1.2
Other Comprehensive Income (Loss), Reclassification Adjustment on Pension Obligation included in Net Income, before Tax	(4.4)			(11.9)
Other Comprehensive Income (Loss), Reclassification Adjustment on Pension Obligation included in Net Income, Tax	1.6			4.3
Other Comprehensive Income (Loss), Reclassification Adjustment on Pension Obligation Included in Net Income, Net of Tax	(2.8)			(7.6)
Other Comprehensive Income (Loss), Net of Tax	$ (5.1)			$ (6.4)