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	Sep. 30, 2012 Litigation matters [Member]	Dec. 31, 2011 Litigation matters [Member]
Loss Contingencies [Line Items]
Litigation accruals on an undiscounted basis					$ 11.5	$ 16.5
Operating lease obligations [Abstract]
Lease and rental expense included in costs and expenses	26.0	21.2	71.1	63.2
Other claims [Abstract]
Claims against various parties related to contractual agreements	38.6		38.6
Claims against us related to contractual agreements	$ 42.3		$ 42.3