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Commitments and Contingencies (Detail) - York, Pennsylvania Facility | 9 Months Ended
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Sep. 30, 2018
Site Contingency |
Site contingency portion of total cost, percentage | 47.00%
Navy |
Site Contingency |
Site contingency portion of total cost, percentage | 53.00%

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- Definition Site Contingency, Environmental Investigation And Remediation Activities, Contribution Amount, Percentage of Future Costs + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=hog_NavyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |