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. 29, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jul. 01, 2018	Apr. 01, 2018	Sep. 29, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income	$ 86,563	$ 195,631	$ 127,945	$ 113,855	$ 242,338	$ 174,763	$ 410,139	$ 530,956
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization							174,609	196,461
Amortization of deferred loan origination costs							57,303	61,213
Amortization of financing origination fees							7,032	6,207
Provision for long-term employee benefits							10,888	28,162
Employee benefit plan contributions and payments							(11,166)	(11,035)
Stock compensation expense							25,323	29,122
Net change in wholesale finance receivables related to sales							683	(18,400)
Provision for credit losses	$ 33,747			$ 23,530			94,621	72,462
Deferred income taxes							3,535	1,457
Other, net							7,839	29,340
Changes in current assets and liabilities:
Accounts receivable, net							(7,833)	(14,784)
Finance receivables - accrued interest and other							(4,574)	1,374
Inventories							62,870	8,270
Accounts payable and accrued liabilities							13,138	183,606
Derivative instruments							2,537	1,227
Other							1,705	16,917
Total adjustments							438,510	591,599
Net cash provided by operating activities							$ 848,649	$ 1,122,555