Income Taxes (Income Taxes) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012		Dec. 31, 2011
Current expense (benefit):
Federal	$ 16.0	$ 7.5		$ 0
State	1.5	0.8		0.5
Foreign	4.2	4.4		7.1
Total	21.7	12.7		7.6
Deferred expense (benefit):
Federal	1.2	7.5		(8.3)
State	(2.6)	(0.2)		(2.5)
Foreign	(0.9)	0.3		(0.6)
Total	(2.3)	7.6		(11.4)
Income tax expense (benefit)	$ 19.4	$ 20.3	[1]	$ (3.8)	[1]

[1] Adjusted to reflect the discontinued operations.