Revenue Additional Information (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Adoption of accounting standard		$ 1.8	$ (91.4)
Retained Earnings
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Adoption of accounting standard	$ 1.8
Retained Earnings | Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Cumulative Effect of New Accounting Principle in Period of Adoption				$ (91.5)
Minimum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Performance Obligation, Warranty, Term		18 years
Maximum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, Performance Obligation, Warranty, Term		36 months
Transferred over Time [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue Recognized, Percent		81.70%