Income Taxes - Deferred Income Taxes Temporary Differences (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Future Income Tax Benefits (Expense)
Accrued payroll taxes and insurance	$ 12.8	$ 13.8
Employee compensation payable	27.2	17.8
Pension and postretirement benefits	62.3	46.9
Intangible assets	(108.7)	(102.1)
Repatriation of non-United States earnings	(8.8)	(15.3)
Loans denominated in foreign currencies	(16.4)	(19.6)
Operating lease ROU assets	(115.8)
Operating lease liabilities	118.1
Net operating losses	89.5	100.5
Other	135.0	97.4
Valuation allowance	(87.8)	(72.4)
Total future tax benefits	107.4	67.0
Deferred tax asset	126.2	99.3
Deferred tax liability	(18.8)	(32.3)
Total future tax benefits	$ 107.4	$ 67.0