Accrued Liabilities and Other Long-Term Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Schedule of Accrued Liabilities and Other Long-Term Liabilities [Line Items]
Multiemployer pension plans – withdrawal liability	$ 34.9
Restructuring liabilities	38.8	$ 40.9
Other Current Liabilities
Schedule of Accrued Liabilities and Other Long-Term Liabilities [Line Items]
Employee-related liabilities	98.4	130.2
Single employer pension plan obligations	1.7	1.7
Multiemployer pension plans – withdrawal liability	3.6	3.5
Deferred revenue	45.7	52.9
Tax-related liabilities	17.9	25.3
Restructuring liabilities	31.1	33.1
Interest and rent liabilities	8.0	3.6
Interest rate swap liabilities	4.0	0.0
Other	41.1	60.5
Total	251.5	310.8
Other Long-Term Liabilities
Schedule of Accrued Liabilities and Other Long-Term Liabilities [Line Items]
Employee-related liabilities	67.3	67.4
Single employer pension plan obligations	49.9	54.9
Multiemployer pension plans – withdrawal liability	31.3	32.2
Deferred revenue	2.3	2.6
Tax-related liabilities	5.3	5.3
Restructuring liabilities	7.0	7.2
Interest and rent liabilities	0.0	0.0
Interest rate swap liabilities	7.7	14.4
Other	13.4	12.8
Total	184.2	196.8
Total
Schedule of Accrued Liabilities and Other Long-Term Liabilities [Line Items]
Employee-related liabilities	165.7	197.6
Single employer pension plan obligations	51.6	56.6
Multiemployer pension plans – withdrawal liability	34.9	35.7
Deferred revenue	48.0	55.5
Tax-related liabilities	23.2	30.6
Restructuring liabilities	38.1	40.3
Interest and rent liabilities	8.0	3.6
Interest rate swap liabilities	11.7	14.4
Other	54.5	73.3
Total	$ 435.7	$ 507.6