Leases (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Leases [Abstract]
Rent expense	$ 16.2	$ 19.5	$ 19.8
Future minimum rental commitments under non-cancelable operating leases [Abstract]
2017	14.4
2018	12.1
2019	9.9
2020	8.2
2021	6.6
Thereafter	33.1
Future minimum rentals to be received under non-cancelable subleases	4.2
Future minimum payments to be received under direct financing leases [Abstract]
2017	0.3
2018	0.3
2019	0.2
2020	0.1
2021	0.1
Thereafter	$ 0.0