Revenue - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Adoption of accounting standards, effect of adoption		$ (91.4)
Transferred over Time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue recognized, percent	83.30%	83.10%
Minimum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, warranty, term		18 months
Maximum
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenue, warranty, term		36 months
Retained Earnings
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Adoption of accounting standards, effect of adoption		$ (91.5)