Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Commitments And Contingencies [Line Items]
Gain on settlement	$ 24.4
Other Income (Expense) - Net
Commitments And Contingencies [Line Items]
Gain on settlement	15.5
Engineering, Selling and Administrative Expenses
Commitments And Contingencies [Line Items]
Gain on settlement	8.9
Other Liabilities
Commitments And Contingencies [Line Items]
Product liability reserves	$ 13.8	$ 16.3