Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments And Contingencies Disclosure [Abstract]

Future Minimum Lease Payments under These Non-cancelable Operating Leases

The approximate future minimum lease payments under these non-cancelable operating leases at December 31, 2018 are as follows (in millions):

	Amount
2019	$	10.4
2020		10.7
2021		8.5
2022		7.6
2023		6.1
Thereafter		38.5
	$	81.8