Commitments and Contingencies (Site Contingency) (Details) - York, Pennsylvania Facility	12 Months Ended
Dec. 31, 2017
Site Contingency [Line Items]
Site contingency, portion of total cost	47.00%
Navy
Site Contingency [Line Items]
Site contingency, portion of total cost	53.00%

Site Contingency, Environmental Investigation And Remediation Activities, Contribution Amount, Percentage of Future Costs

No definition available.

Name:	hog_SiteContingencyEnvironmentalInvestigationAndRemediationActivitiesContributionAmountPercentageofFutureCosts
Namespace Prefix:	hog_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration