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Commitments and Contingencies (Site Contingency) (Details) - York, Pennsylvania Facility | 12 Months Ended
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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%

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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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Data Type: | num:percentItemType
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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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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