Income Taxes - Deferred Income Taxes Temporary Differences (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Future Income Tax Benefits (Expense)
Accrued payroll taxes and insurance	$ 13.8	$ 17.3
Employee compensation payable	17.8	20.2
Pension and postretirement benefits	46.9	49.0
Intangible assets	(102.1)	(103.0)
Repatriation of non-United States earnings	(15.3)	(5.5)
Loans denominated in foreign currencies	(19.6)	(13.5)
Net operating losses	100.5	104.1
Other	97.4	77.6
Valuation allowance	(72.4)	(77.5)
Total future tax benefits	67.0	68.7
Deferred tax asset	99.3	101.0
Deferred tax liability	(32.3)	(32.3)
Total future tax benefits	$ 67.0	$ 68.7