Commitments and Contingencies - Operating Leases, Future Minimum Payments Due (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies Disclosure [Abstract]

Schedule of future minimum rental payments for operating leases

Future non-cancelable minimum operating lease commitments are as follows (in millions):

Due	Amount
2018	$	38.1
2019	31.9
2020	24.3
2021	18.6
2022	13.7
Thereafter	16.6