Operating Leases (Schedule of Future Commitments Under Non-Cancelable Operating Leases) (Details) $ in Millions	Dec. 31, 2015 USD ($)
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2016	$ 70.5
2017	60.5
2018	61.4
2019	60.2
2020	52.4
Thereafter	154.0
Gross lease commitments	459.0
Less: future minimum payments expected to be received under non-cancelable subleases	67.0
Net lease commitments	392.0
Building [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2016	67.2
2017	57.4
2018	58.7
2019	57.8
2020	50.7
Thereafter	153.2
Gross lease commitments	445.0
Less: future minimum payments expected to be received under non-cancelable subleases	67.0
Net lease commitments	378.0
Other [Member]
Operating Leases, Future Minimum Payments Due, Fiscal Year Maturity [Abstract]
2016	3.3
2017	3.1
2018	2.7
2019	2.4
2020	1.7
Thereafter	0.8
Gross lease commitments	14.0
Less: future minimum payments expected to be received under non-cancelable subleases	0.0
Net lease commitments	$ 14.0