Self-Insurance (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Self Insurance Reserves [Abstract]
Self insurance reserve	$ 155.8	$ 155.6
Self insurance reserves, noncurrent	92.5	94.5
Accrual receivable	22.7	13.1
Accrued reserves decreased facility operating expense	11.3	14.6	$ 9.9
Cash deposits for self insured retention risk	24.0	14.7
Letters of credit associated to the secured self-insured retention risk	55.6	71.8
Cash deposit to collateralize the insurance policy	$ 12.3	$ 13.7