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Derivative Financial Instruments and Hedging Activities - Amount Of Gains And Losses Recognized In Income Related To Derivative Financial Instruments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Motorcycles and Related Products cost of goods sold	$ 2,435,745	$ 3,229,798	$ 3,351,796
Selling, administrative and engineering expense	1,050,627	1,199,056	1,258,098
Interest expense	31,121	31,078	30,884
Financial Services interest expense	246,447	210,438	193,187
Expected to be reclassified in next twelve months	(32,900)
Cash Flow Hedging \| Designated as Hedging Instrument
Derivative [Line Items]
Gain/(Loss) Reclassified from AOCL into Income	148,107	27,732
Gain/(Loss) Reclassified from AOCL into Income			9,466
Cash Flow Hedging \| Designated as Hedging Instrument \| Foreign currency contracts
Derivative [Line Items]
Gain/(Loss) Reclassified from AOCL into Income	9,859	21,433
Gain/(Loss) Reclassified from AOCL into Income			11,492
Cash Flow Hedging \| Designated as Hedging Instrument \| Commodity contracts
Derivative [Line Items]
Gain/(Loss) Reclassified from AOCL into Income	(189)	(70)
Cash Flow Hedging \| Designated as Hedging Instrument \| Cross-currency swaps
Derivative [Line Items]
Gain/(Loss) Reclassified from AOCL into Income	153,472
Gain/(Loss) Reclassified from AOCL into Income			0
Cash Flow Hedging \| Designated as Hedging Instrument \| Treasury rate lock contracts
Derivative [Line Items]
Gain/(Loss) Reclassified from AOCL into Income	(492)	(492)
Gain/(Loss) Reclassified from AOCL into Income			(498)
Cash Flow Hedging \| Designated as Hedging Instrument \| Interest rate swaps
Derivative [Line Items]
Gain/(Loss) Reclassified from AOCL into Income	(14,543)	(5,295)
Gain/(Loss) Reclassified from AOCL into Income			(1,552)
Cash Flow Hedging \| Motorcycles cost of goods sold \| Designated as Hedging Instrument \| Foreign currency contracts
Derivative [Line Items]
Gain/(Loss) Reclassified from AOCL into Income	9,859	21,433
Gain/(Loss) Reclassified from AOCL into Income			11,492
Cash Flow Hedging \| Motorcycles cost of goods sold \| Designated as Hedging Instrument \| Commodity contracts
Derivative [Line Items]
Gain/(Loss) Reclassified from AOCL into Income	(189)	(70)
Gain/(Loss) Reclassified from AOCL into Income			24
Cash Flow Hedging \| Selling, administrative & engineering expense \| Designated as Hedging Instrument \| Cross-currency swaps
Derivative [Line Items]
Gain/(Loss) Reclassified from AOCL into Income	153,472	12,156
Cash Flow Hedging \| Interest expense \| Designated as Hedging Instrument \| Treasury rate lock contracts
Derivative [Line Items]
Gain/(Loss) Reclassified from AOCL into Income	(362)	(362)
Gain/(Loss) Reclassified from AOCL into Income			(362)
Cash Flow Hedging \| Financial Services interest expense \| Designated as Hedging Instrument \| Treasury rate lock contracts
Derivative [Line Items]
Gain/(Loss) Reclassified from AOCL into Income	(130)	(130)
Gain/(Loss) Reclassified from AOCL into Income			$ (136)
Cash Flow Hedging \| Financial Services interest expense \| Designated as Hedging Instrument \| Interest rate swaps
Derivative [Line Items]
Gain/(Loss) Reclassified from AOCL into Income	$ (14,543)	$ (5,295)