Revenue Recognition Estimated Revenue Expected to be Recognized In the future (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($)
Revenue Recognition [Abstract]
Revenue expected to be recognized on VCP contracts sold as of period end	$ 89.4
Vehicle maintenance program, contract term	5 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-04-01
Revenue Recognition [Abstract]
Revenue expected to be recognized on VCP contracts sold as of period end	$ 29.6
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-04-01
Revenue Recognition [Abstract]
Revenue expected to be recognized on VCP contracts sold as of period end	$ 44.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	2 years
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-04-01
Revenue Recognition [Abstract]
Revenue expected to be recognized on VCP contracts sold as of period end	$ 15.3
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	2 years