Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash paid during the period:
Interest	$ 2.3	$ 2.8
Income taxes	0.2	0.0
Operating leases	11.5	15.7
Non-cash investing and financing activities:
Lease liabilities recognized in exchange for new lease right-of-use assets	$ 0.0	$ 5.1