Derivative Instruments and Hedging Activities (Gain Loss On Derivative Cash Flow Hedges Recognized In OCI) (Detail) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Apr. 01, 2018
Derivative Instruments, Gain (Loss)
Costs and expenses	$ 848,198	$ 890,174
Interest expense	7,731	7,690
Financial Services interest expense	52,324	48,450
Expected to be Reclassified Over the Next Twelve Months	11,600
Designated as Hedging Instrument \| Cash Flow Hedging
Derivative Instruments, Gain (Loss)
Amount of Gain/(Loss) Recognized in OCI, before tax	1,177	(5,906)
Amount of Gain/(Loss) Reclassified from AOCL into Income	1,715	(6,908)
Motorcycle, Cost of Goods Sold \| Designated as Hedging Instrument \| Cash Flow Hedging \| Foreign currency contracts
Derivative Instruments, Gain (Loss)
Amount of Gain/(Loss) Recognized in OCI, before tax	4,152	(5,890)
Amount of Gain/(Loss) Reclassified from AOCL into Income	2,453	(6,709)
Motorcycle, Cost of Goods Sold \| Designated as Hedging Instrument \| Cash Flow Hedging \| Commodity contracts
Derivative Instruments, Gain (Loss)
Amount of Gain/(Loss) Recognized in OCI, before tax	30	(16)
Amount of Gain/(Loss) Reclassified from AOCL into Income	(10)	(73)
Costs and expenses	848,198	890,174
Interest Expense \| Designated as Hedging Instrument \| Cash Flow Hedging \| Treasury Rate Locks
Derivative Instruments, Gain (Loss)
Amount of Gain/(Loss) Recognized in OCI, before tax	0	0
Amount of Gain/(Loss) Reclassified from AOCL into Income	(90)	(90)
Interest expense	7,731	7,690
Financial Services, Interest Expense \| Designated as Hedging Instrument \| Cash Flow Hedging \| Treasury Rate Locks
Derivative Instruments, Gain (Loss)
Amount of Gain/(Loss) Recognized in OCI, before tax	0	0
Amount of Gain/(Loss) Reclassified from AOCL into Income	(32)	(36)
Financial Services, Interest Expense \| Designated as Hedging Instrument \| Cash Flow Hedging \| Interest Rate Swap
Derivative Instruments, Gain (Loss)
Amount of Gain/(Loss) Recognized in OCI, before tax	(3,005)	0
Amount of Gain/(Loss) Reclassified from AOCL into Income	(606)	0
Financial Services interest expense	$ 52,324	$ 48,450

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

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The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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