Accrued Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Accrued Liabilities, Current [Abstract]
Payroll and other employee liabilities	$ 159.1	$ 140.8
Taxes, except income taxes	112.2	98.1
Income taxes payable	21.6	26.7
Acquisition-related obligations	0.0	7.8
Workers’ compensation and other claims	31.6	26.1
Cash held by cash management services operations(a)	19.1	26.3
Cash supply chain deposit liability	113.7	47.4
Retirement benefits (see Note 4)	13.1	12.9
Operating lease liabilities	77.2	65.9
Accrued interest	17.5	6.0
Contract liability	15.1	12.8
Derivative instruments	10.9	6.7
Other	188.1	150.9
Accrued liabilities	$ 779.2	$ 628.4