Revenue - Performance Obligations (Details)	12 Months Ended
	Dec. 31, 2020
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue recognized over remaining contract term
Motorcycles | Licensing
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Sale payment terms	30 days
Motorcycles | Licensing | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue recognized over remaining contract term	2 years
Financial Services | Other | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Revenue recognized over remaining contract term	5 years
Minimum | Motorcycles | Motorcycles
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Sale payment terms	30 days
Maximum | Motorcycles | Motorcycles
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction
Sale payment terms	120 days