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Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 Y	Dec. 31, 2011	Dec. 31, 2010
Lease Commitments
Minimum term of non-cancelable lease commitments for further disclosure (in years)	1
Rental expense	$ 73.6	$ 70.1	$ 72.4
Operating lease payments due to various related parties	4.6	4.8	4.1
Operating Leases
2013	55.9
2014	45.4
2015	38.3
2016	30.5
2017	25.6
Thereafter	68.4
Total	$ 264.1

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