Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Loss Contingencies [Line Items]
Settlements, litigations and other related charges	$ 4.9	$ 6.7	$ 38.2	$ 32.6