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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, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Pension Plan Assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | $ 1,874,618 | $ 2,162,885 |
Total assets in the fair value hierarchy excluding assets measured at net asset value | 1,858,192 | 2,148,684 |
Pension Plan Assets | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 1,149,386 | 1,368,474 |
Pension Plan Assets | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 708,806 | 780,210 |
Pension Plan Assets | Cash and cash equivalents |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 40,984 | 51,082 |
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 | 0 | 1,057 |
Pension Plan Assets | Cash and cash equivalents | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 40,984 | 50,025 |
Pension Plan Assets | Equity Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 1,076,467 | 1,283,092 |
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 | 1,061,618 | 1,265,676 |
Pension Plan Assets | Equity Securities | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 14,849 | 17,416 |
Pension Plan Assets | U.S. companies |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 636,308 | 722,527 |
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 | 621,459 | 705,111 |
Pension Plan Assets | U.S. companies | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 14,849 | 17,416 |
Pension Plan Assets | Foreign companies |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 66,143 | 78,765 |
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 | 66,143 | 78,765 |
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 | 43,455 | 64,800 |
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 | 43,455 | 64,800 |
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 | 330,476 | 416,881 |
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 | 330,476 | 416,881 |
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 | 85 | 119 |
Pension Plan Assets | Other | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 85 | 119 |
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 | 740,741 | 814,510 |
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 | 87,768 | 101,741 |
Pension Plan Assets | Fixed-income holdings | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 652,973 | 712,769 |
Pension Plan Assets | U.S. Treasuries |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 45,102 | 39,866 |
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 | 45,102 | 39,866 |
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 | 27,811 | 29,188 |
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 | 27,811 | 29,188 |
Pension Plan Assets | Corporate bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 434,070 | 462,563 |
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 | 434,070 | 462,563 |
Pension Plan Assets | Pooled fixed income funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 140,630 | 189,361 |
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 | 42,400 | 61,875 |
Pension Plan Assets | Pooled fixed income funds | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 98,230 | 127,486 |
Pension Plan Assets | Foreign bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 83,852 | 81,732 |
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 | 266 | 0 |
Pension Plan Assets | Foreign bonds | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 83,586 | 81,732 |
Pension Plan Assets | Municipal bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 9,276 | 11,800 |
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 | 9,276 | 11,800 |
Pension Plan Assets | Limited partnership interests |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Assets measured at net asset value | 5,918 | 9,099 |
Pension Plan Assets | Real estate investment trusts |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Assets measured at net asset value | 10,508 | 5,102 |
Postretirement Health Coverage |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 190,357 | 217,537 | $ 170,092
Total assets in the fair value hierarchy excluding assets measured at net asset value | 184,860 | 210,787 |
Postretirement Health Coverage | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 166,713 | 179,056 |
Postretirement Health Coverage | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 18,147 | 31,731 |
Postretirement Health Coverage | Cash and cash equivalents |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 5,276 | 19,317 |
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 | 0 | 0 |
Postretirement Health Coverage | Cash and cash equivalents | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 5,276 | 19,317 |
Postretirement Health Coverage | Equity Securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 124,073 | 144,795 |
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 | 124,047 | 144,792 |
Postretirement Health Coverage | Equity Securities | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 26 | 3 |
Postretirement Health Coverage | U.S. companies |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 86,975 | 101,720 |
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 | 86,949 | 101,720 |
Postretirement Health Coverage | U.S. companies | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 26 | 0 |
Postretirement Health Coverage | Foreign companies |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 16,342 | 19,498 |
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 | 16,342 | 19,495 |
Postretirement Health Coverage | Foreign companies | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 0 | 3 |
Postretirement Health Coverage | Pooled equity funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 20,747 | 23,563 |
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 | 20,747 | 23,563 |
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 | 14 |
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 | 14 |
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 | 55,511 | 46,675 |
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 | 42,666 | 34,264 |
Postretirement Health Coverage | Fixed-income holdings | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 12,845 | 12,411 |
Postretirement Health Coverage | U.S. Treasuries |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 8,707 | 6,803 |
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 | 8,707 | 6,803 |
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 | 5,445 | 5,060 |
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 | 5,445 | 5,060 |
Postretirement Health Coverage | Corporate bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 6,590 | 6,756 |
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 | 6,590 | 6,756 |
Postretirement Health Coverage | Pooled fixed income funds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 33,959 | 27,461 |
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 | 33,959 | 27,461 |
Postretirement Health Coverage | Pooled fixed income funds | Significant Other Observable Inputs (Level 2) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 0 | 0 |
Postretirement Health Coverage | Foreign bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 538 | 311 |
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 | 538 | 311 |
Postretirement Health Coverage | Municipal bonds |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total pension plan assets | 272 | 284 |
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 | 272 | 284 |
Postretirement Health Coverage | Real estate investment trusts |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Assets measured at net asset value | $ 5,497 | $ 6,750 |

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