Accrued Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Accrued Liabilities, Current [Abstract]
Payroll and other employee liabilities	$ 120.3	$ 138.8
Taxes, except income taxes	89.4	96.3
Cash held by Cash Management Services operations(a)	37.1	28.0
Workers’ compensation and other claims	24.2	22.5
Retirement benefits (see note 3)	8.3	8.9
Income taxes payable	16.8	11.9
Other	118.0	159.9
Accrued liabilities	$ 414.1	$ 466.3