Finance Receivables - Aging Of Past Due Finance Receivables Including Non Accrual Status Finance Receivables (Details) - USD ($) $ in Thousands	Jun. 27, 2021	Dec. 31, 2020	Jun. 28, 2020
Financing Receivable, Recorded Investment, Past Due
Total	$ 7,247,765	$ 6,833,944	$ 7,391,006
Current
Financing Receivable, Recorded Investment, Past Due
Total	7,115,714	6,653,925	7,289,989
Total Past Due
Financing Receivable, Recorded Investment, Past Due
Total	132,051	180,019	101,017
31-60 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total	87,892	106,984	64,451
61-90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total	27,300	39,956	17,044
Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total	16,859	33,079	19,522
Retail
Financing Receivable, Recorded Investment, Past Due
Total	6,663,518	6,344,195	6,520,919
Retail | Current
Financing Receivable, Recorded Investment, Past Due
Total	6,531,560	6,164,369	6,425,078
Retail | Total Past Due
Financing Receivable, Recorded Investment, Past Due
Total	131,958	179,826	95,841
Retail | 31-60 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total	87,853	106,818	63,190
Retail | 61-90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total	27,300	39,933	16,631
Retail | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total	16,805	33,075	16,020
Wholesale
Financing Receivable, Recorded Investment, Past Due
Total	584,247	489,749	870,087
Wholesale | Current
Financing Receivable, Recorded Investment, Past Due
Total	584,154	489,556	864,911
Wholesale | Total Past Due
Financing Receivable, Recorded Investment, Past Due
Total	93	193	5,176
Wholesale | 31-60 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total	39	166	1,261
Wholesale | 61-90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total	0	23	413
Wholesale | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total	$ 54	$ 4	$ 3,502