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				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jul. 01, 2018	Apr. 01, 2018	Jun. 30, 2019	Jul. 01, 2018
Cash flows from operating activities:
Net income	$ 195,631	$ 127,945	$ 242,338	$ 174,763	$ 323,576	$ 417,101
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of intangibles					125,386	130,061
Amortization of deferred loan origination costs					38,036	39,396
Amortization of financing origination fees					4,522	4,133
Provision for long-term employee benefits					6,936	18,954
Employee benefit plan contributions and payments					(3,637)	(6,422)
Stock compensation expense					17,285	19,081
Net change in wholesale finance receivables related to sales					(167,594)	(171,195)
Provision for credit losses	$ 26,383		$ 18,880		60,874	48,932
Deferred income taxes					5,368	1,515
Other, net					(10,477)	20,894
Changes in current assets and liabilities:
Accounts receivable, net					(17,592)	(14,882)
Finance receivables - accrued interest and other					(4,963)	4,228
Inventories					88,146	63,957
Accounts payable and accrued liabilities					34,370	161,101
Derivative instruments					4,352	(136)
Other					(8,356)	(859)
Total adjustments					172,656	318,758
Net cash provided by operating activities					$ 496,232	$ 735,859