Income Taxes (Details 1) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Change in unrecognized tax benefits
Beginning balance	$ 55.0	$ 48.7
Additions for tax positions related to the current year	3.7	3.4
Additions for tax positions of prior years	0.3	1.9
Reductions for tax positions of prior years	(0.1)	0
Settlements	0	(0.1)
Expiration of statute of limitations	0	(0.1)
Ending balance	$ 58.9	$ 53.8