Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Leases, Rent Expense, Net [Abstract]
Minimum Rental Expense	$ 20.7	$ 21.5	$ 28.3
Less: Sublease Rental Income	(1.7)	(1.3)	(1.8)
Net Rental Expense	19.0	$ 20.2	$ 26.5
Future Minimum Lease Payments, Capital and Operating Leases
Capital Leases, Future Minimum Payments Due, 2016	2.4
Capital Leases, Future Minimum Payments Due, 2017	0.7
Capital Leases, Future Minimum Payments Due, 2018	0.1
Capital Leases, Future Minimum Payments Due, 2019	0.0
Capital Leases, Future Minimum Payments Due, 2020	0.0
Capital Leases, Future Minimum Payments Due, 2021 and Thereafter	0.0
Capital Leases, Total Future Payments	3.2
Less: Imputed Interest	(0.2)
Present Value of Minimum Capital Lease Payments	3.0
Operating Leases, Future Minimum Payments Due, 2016	17.8
Operating Leases, Future Minimum Payments Due, 2017	16.5
Operating Leases, Future Minimum Payments Due, 2018	11.9
Operating Leases, Future Minimum Payments Due, 2019	8.6
Operating Leases, Future Minimum Payments Due, 2020	6.3
Operating Leases, Future Minimum Payments Due, 2021 and Thereafter	14.2
Operating Leases, Total Future Payments	75.3
Total of minimum rentals to be received in the future under non-cancelable subleases	$ 3.9
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	10 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