Income Taxes (Details 1) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Change in unrecognized tax benefits
Beginning balance	$ 48.7	$ 52.5
Additions for tax positions related to the current year	3.4	3.1
Additions for tax positions of prior years	1.9	0
Reductions for tax positions of prior years	0	(1.1)
Settlements	(0.1)	(3.4)
Expiration of statute of limitations	(0.1)	(0.8)
Ending balance	$ 53.8	$ 50.3