Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2012

Commitments and Contingencies

Schedule of amounts associated with total rent expense for operating leases

Year ended December 31,(in millions)	Amount
2012	$	72.4
2011	81.3
2010	83.7

Schedule of future minimum aggregate rental commitments due under all noncancelable operating leases, net of sublease income

Year ended December 31,(in millions)	Amount
2013	$	57.3
2014	47.1
2015	37.8
2016	34.4
2017	26.8
Thereafter	89.9