Additional Balance Sheet and Cash Flow Information - Reconciliation Of Net Income To Net Cash Used By Operating Activities (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 27, 2020	Jun. 28, 2020	Mar. 29, 2020	Sep. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 27, 2020	Sep. 29, 2019
Cash flows from operating activities:
Net income	$ 120,218	$ (92,217)	$ 69,695	$ 86,563	$ 195,631	$ 127,945	$ 97,696	$ 410,139
Adjustments to reconcile Net income to Net cash provided by operating activities:
Depreciation and amortization							140,057	174,609
Amortization of deferred loan origination costs							52,374	57,303
Amortization of financing origination fees							10,628	7,032
Provision for long-term employee benefits							23,557	10,888
Employee benefit plan contributions and payments							(5,456)	(11,166)
Stock compensation expense							12,076	25,323
Net change in wholesale finance receivables related to sales							330,793	683
Provision for credit losses	$ 7,835			$ 33,747			178,433	94,621
Deferred income taxes							(18,978)	3,535
Other, net							(9,320)	7,839
Changes in current assets and liabilities:
Accounts receivable, net							29,630	(7,833)
Finance receivables – accrued interest and other							5,097	(4,574)
Inventories, net							273,668	62,870
Accounts payable and accrued liabilities							(16,922)	13,138
Derivative financial instruments							(1,543)	2,537
Other							33,278	1,705
Total adjustments							1,037,372	438,510
Net cash provided by operating activities							$ 1,135,068	$ 848,649