Revenue - Accounts Receivable, Allowance for Credit Loss (Details) - Allowance for Doubtful Accounts - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Valuation and qualifying accounts [Roll forward]
Balance at beginning of period	$ 12.8	$ 13.3	$ 9.8
Provision within facility operating expense	22.6	20.0	21.6
Write-offs	(22.5)	(22.2)	(19.2)
Recoveries and other	1.2	1.7	1.1
Balance at end of period	$ 14.1	$ 12.8	$ 13.3