Leases (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating Leases, Rent Expense, Net [Abstract]
Minimum Rental Expense	$ 28.3	$ 33.2	$ 31.5
Less: Sublease Rental Income	(1.8)	(2.5)	(2.1)
Net Rental Exense	26.5	30.7	29.4
Future Minimum Lease Payments, Capital and Operating Leases
Capital Leases, Future Minimum Payments Due, 2013	4.7
Capital Leases, Future Minimum Payments Due, 2014	2.2
Capital Leases, Future Minimum Payments Due, 2015	2.1
Capital Leases, Future Minimum Payments Due, 2016	1.5
Capital Leases, Future Minimum Payments Due, 2017	0.1
Capital Leases, Future Minimum Payments Due, 2018 and Thereafter	0
Capital Leases, Total Future Payments	10.6
Less: Imputed Interest	(1.1)
Present Value of Minimum Capital Lease Payments	9.5
Operating Leases, Future Minimum Payments Due, 2013	25.1
Operating Leases, Future Minimum Payments Due, 2014	18.7
Operating Leases, Future Minimum Payments Due, 2015	16.7
Operating Leases, Future Minimum Payments Due, 2016	15.1
Operating Leases, Future Minimum Payments Due, 2017	8.9
Operating Leases, Future Minimum Payments Due, 2018 and Thereafter	15.3
Operating Leases, Total Future Payments	99.8
Capital Leases, Future Minimum Sublease Rentals	$ 5.5
Office Space [Member] | Minimum [Member]
Operating Leased Assets [Line Items]
Operating Lease, Term	1 year
Office Space [Member] | Maximum [Member]
Operating Leased Assets [Line Items]
Operating Lease, Term	12 years
Equipment [Member] | Minimum [Member]
Operating Leased Assets [Line Items]
Operating Lease, Term	1 year
Equipment [Member] | Maximum [Member]
Operating Leased Assets [Line Items]
Operating Lease, Term	5 years