Revenue (Performance Obligations) (Details)	3 Months Ended
	Apr. 01, 2018
Motorcycles and Related Products | Licensing
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Sale Payment Terms	30 days
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	6 years
Financial Services | Financial Services Other income
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period	6 years
Minimum [Member] | Motorcycles and Related Products | Parts & Accessories
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Sale Payment Terms	30 days
Minimum [Member] | Motorcycles and Related Products | Motorcycles
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Sale Payment Terms	30 days
Minimum [Member] | Motorcycles and Related Products | General Merchandise
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Sale Payment Terms	30 days
Maximum [Member] | Motorcycles and Related Products | Parts & Accessories
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Sale Payment Terms	120 days
Maximum [Member] | Motorcycles and Related Products | Motorcycles
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Sale Payment Terms	120 days
Maximum [Member] | Motorcycles and Related Products | General Merchandise
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Sale Payment Terms	120 days