Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income Tax Disclosure [Abstract]
Effective income tax rate, continuing operations			26.00%	29.00%
Tax benefit of project termination settlement			$ 3.8
Tax benefit associated with retirement obligations			2.1
Other Tax Adjustments			1.7	9.0
Tax benefit of research and development and international tax credit extensions			6.6
Tax impact of other tax adjustments			4.9
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	0	(37.9)	0	(37.9)
Tax benefit associated with loss on disposal				$ 5.5