Self-Insurance (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Self Insurance Reserves [Abstract]
Self insurance reserve	$ 153.0	$ 155.8
Self insurance reserves, noncurrent	88.4	92.5
Accrual receivable	18.0	22.7
Cash deposits for self insured retention risk	21.9	24.0
Letters of credit associated to the secured self-insured retention risk	61.3	55.6
Cash deposit to collateralize the insurance policy	$ 7.7	$ 12.3