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Employee Benefit Plans and Other Postretirement Benefits (Schedule Of Fair Value Of Pension Plan and Postretirement Healthcare Plan Assets) (Details) - USD ($) $ in Thousands | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | --- | ---
Pension Plan Assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | $ 1,899,889 | $ 1,841,967 |
Total assets in the fair value hierarchy excluding assets measured at net asset value | 1,877,945 | 1,818,635 |
Pension Plan Assets | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 1,127,105 | 1,139,076 |
Pension Plan Assets | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 750,840 | 679,559 |
Pension Plan Assets | Cash and cash equivalents |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 84,548 | 33,539 |
Pension Plan Assets | Cash and cash equivalents | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 1,284 | 1,485 |
Pension Plan Assets | Cash and cash equivalents | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 83,264 | 32,054 |
Pension Plan Assets | Equity Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 1,044,455 | 1,048,370 |
Pension Plan Assets | Equity Securities | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 1,027,189 | 1,045,493 |
Pension Plan Assets | Equity Securities | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 17,266 | 2,877 |
Pension Plan Assets | U.S. companies |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 603,568 | 574,826 |
Pension Plan Assets | U.S. companies | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 586,302 | 571,949 |
Pension Plan Assets | U.S. companies | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 17,266 | 2,877 |
Pension Plan Assets | Foreign companies |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 50,256 | 113,803 |
Pension Plan Assets | Foreign companies | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 50,256 | 113,803 |
Pension Plan Assets | Foreign companies | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 0 | 0 |
Pension Plan Assets | Harley-Davidson common stock |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 74,301 | 57,808 |
Pension Plan Assets | Harley-Davidson common stock | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 74,301 | 57,808 |
Pension Plan Assets | Harley-Davidson common stock | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 0 | 0 |
Pension Plan Assets | Pooled equity funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 316,225 | 301,824 |
Pension Plan Assets | Pooled equity funds | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 316,225 | 301,824 |
Pension Plan Assets | Pooled equity funds | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 0 | 0 |
Pension Plan Assets | Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 105 | 109 |
Pension Plan Assets | Other | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 105 | 109 |
Pension Plan Assets | Other | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 0 | 0 |
Pension Plan Assets | Fixed-income holdings |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 748,942 | 736,726 |
Pension Plan Assets | Fixed-income holdings | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 98,632 | 92,098 |
Pension Plan Assets | Fixed-income holdings | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 650,310 | 644,628 |
Pension Plan Assets | U.S. Treasuries |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 41,089 | 42,827 |
Pension Plan Assets | U.S. Treasuries | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 41,089 | 42,827 |
Pension Plan Assets | U.S. Treasuries | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 0 | 0 |
Pension Plan Assets | Federal agencies |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 36,210 | 43,695 |
Pension Plan Assets | Federal agencies | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 0 | 0 |
Pension Plan Assets | Federal agencies | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 36,210 | 43,695 |
Pension Plan Assets | Corporate bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 418,522 | 388,439 |
Pension Plan Assets | Corporate bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 0 | 0 |
Pension Plan Assets | Corporate bonds | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 418,522 | 388,439 |
Pension Plan Assets | Pooled fixed income funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 170,741 | 184,142 |
Pension Plan Assets | Pooled fixed income funds | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 57,543 | 49,271 |
Pension Plan Assets | Pooled fixed income funds | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 113,198 | 134,871 |
Pension Plan Assets | Foreign bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 69,871 | 64,533 |
Pension Plan Assets | Foreign bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 0 | 0 |
Pension Plan Assets | Foreign bonds | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 69,871 | 64,533 |
Pension Plan Assets | Municipal bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 12,509 | 13,090 |
Pension Plan Assets | Municipal bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 0 | 0 |
Pension Plan Assets | Municipal bonds | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 12,509 | 13,090 |
Pension Plan Assets | Limited partnership interests |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Assets measured at net asset value | 9,321 | 10,530 |
Pension Plan Assets | Real estate investment trust |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Assets measured at net asset value | 12,623 | 12,802 |
Postretirement Health Coverage |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 170,092 | 156,765 | $ 156,840
Total assets in the fair value hierarchy excluding assets measured at net asset value | 164,574 | 151,874 |
Postretirement Health Coverage | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 131,221 | 121,864 |
Postretirement Health Coverage | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 33,353 | 30,010 |
Postretirement Health Coverage | Cash and cash equivalents |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 4,442 | 6,068 |
Postretirement Health Coverage | Cash and cash equivalents | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 1,180 | 2,980 |
Postretirement Health Coverage | Cash and cash equivalents | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 3,262 | 3,088 |
Postretirement Health Coverage | Equity Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 117,974 | 108,771 |
Postretirement Health Coverage | Equity Securities | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 117,779 | 108,353 |
Postretirement Health Coverage | Equity Securities | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 195 | 418 |
Postretirement Health Coverage | U.S. companies |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 84,643 | 74,083 |
Postretirement Health Coverage | U.S. companies | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 84,643 | 74,083 |
Postretirement Health Coverage | U.S. companies | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 0 | 0 |
Postretirement Health Coverage | Foreign companies |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 14,190 | 17,267 |
Postretirement Health Coverage | Foreign companies | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 13,995 | 16,849 |
Postretirement Health Coverage | Foreign companies | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 195 | 418 |
Postretirement Health Coverage | Pooled equity funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 19,132 | 17,410 |
Postretirement Health Coverage | Pooled equity funds | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 19,132 | 17,410 |
Postretirement Health Coverage | Pooled equity funds | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 0 | 0 |
Postretirement Health Coverage | Other |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 9 | 11 |
Postretirement Health Coverage | Other | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 9 | 11 |
Postretirement Health Coverage | Other | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 0 | 0 |
Postretirement Health Coverage | Fixed-income holdings |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 42,158 | 37,035 |
Postretirement Health Coverage | Fixed-income holdings | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 12,262 | 10,531 |
Postretirement Health Coverage | Fixed-income holdings | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 29,896 | 26,504 |
Postretirement Health Coverage | U.S. Treasuries |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 12,262 | 10,531 |
Postretirement Health Coverage | U.S. Treasuries | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 12,262 | 10,531 |
Postretirement Health Coverage | U.S. Treasuries | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 0 | 0 |
Postretirement Health Coverage | Federal agencies |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 7,364 | 6,508 |
Postretirement Health Coverage | Federal agencies | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 0 | 0 |
Postretirement Health Coverage | Federal agencies | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 7,364 | 6,508 |
Postretirement Health Coverage | Corporate bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 11,750 | 10,270 |
Postretirement Health Coverage | Corporate bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 0 | 0 |
Postretirement Health Coverage | Corporate bonds | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 11,750 | 10,270 |
Postretirement Health Coverage | Pooled fixed income funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 9,690 | 8,305 |
Postretirement Health Coverage | Pooled fixed income funds | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 0 | 0 |
Postretirement Health Coverage | Pooled fixed income funds | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 9,690 | 8,305 |
Postretirement Health Coverage | Foreign bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 633 | 890 |
Postretirement Health Coverage | Foreign bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 0 | 0 |
Postretirement Health Coverage | Foreign bonds | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 633 | 890 |
Postretirement Health Coverage | Municipal bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 459 | 531 |
Postretirement Health Coverage | Municipal bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 0 | 0 |
Postretirement Health Coverage | Municipal bonds | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 459 | 531 |
Postretirement Health Coverage | Real estate investment trust |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Assets measured at net asset value | $ 5,518 | $ 4,891 |

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