Supplemental Cash Flow Information - Schedule of Non Cash Investing and Financing Activities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash paid for:
Interest	$ 150.1	$ 184.0	$ 142.1
Income taxes	58.7	50.6	36.8
Non-cash investing/financing activities:
Property and equipment acquired through finance leases	12.3	7.2	14.0
Deferred and contingent payment obligation incurred through acquisitions	22.6	21.1	50.3
Equity issued in conjunction with acquisitions	0.0	0.7	1.0
Increase in beneficial interest in a securitization	$ 11.8	$ 13.2	$ 41.9