Accumulated Other Comprehensive Loss - Reclassifications Out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of Sales	$ 1,278.3	$ 1,239.8
Other Expense, Net	6.5	1.2
Prior Service Credits	151.6	$ 0.1
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total, Net of Tax	151.0
Reclassification out of Accumulated Other Comprehensive Income | Derivatives Instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total, Net of Tax	(2.6)
Reclassification out of Accumulated Other Comprehensive Income | Derivatives Instruments | Commodity Contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of Sales	(3.1)
Reclassification out of Accumulated Other Comprehensive Income | Derivatives Instruments | Foreign Currency Contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other Expense, Net	(0.4)
Reclassification out of Accumulated Other Comprehensive Income | Derivatives Instruments | Interest Rate Swap Agreements
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest Expense, Net	0.9
Reclassification out of Accumulated Other Comprehensive Income | Pension and Postretirement Benefit Plans | Pension Benefit Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Prior Service Costs	0.0
Actuarial (Losses) Gains	154.1
Total, Net of Tax	154.1
Reclassification out of Accumulated Other Comprehensive Income | Pension and Postretirement Benefit Plans | Postretirement Health Care Benefits
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Prior Service Credits	0.1
Actuarial (Losses) Gains	(0.4)
Total, Net of Tax	$ (0.5)