Operating Lease Commitments (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases

Minimum future non-cancelable operating lease commitments were as follows:

($ amounts in millions)	Operating Lease Commitments
Year ending December 31,
2019	$	19.2
2020	15.5
2021	11.9
2022	9.7
2023	7.7
Thereafter	27.9
Total	$	91.9