Finance Receivables - Aging Of Past Due Finance Receivables Including Non Accrual Status Finance Receivables (Details) - USD ($) $ in Thousands	Mar. 28, 2021	Dec. 31, 2020	Mar. 29, 2020
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	$ 114,839	$ 180,019	$ 184,500
Total	7,103,010	6,833,944	7,627,903
Current
Financing Receivable, Recorded Investment, Past Due
Financing receivable, not past due	6,988,171	6,653,925	7,443,403
31-60 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	69,160	106,984	103,463
61-90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	23,442	39,956	39,253
Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	22,237	33,079	41,784
Retail
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	114,637	179,826	177,928
Total	6,310,982	6,344,195	6,269,247
Retail | Current
Financing Receivable, Recorded Investment, Past Due
Financing receivable, not past due	6,196,345	6,164,369	6,091,319
Retail | 31-60 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	69,032	106,818	101,412
Retail | 61-90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	23,420	39,933	37,816
Retail | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	22,185	33,075	38,700
Wholesale
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	202	193	6,572
Total	792,028	489,749	1,358,656
Wholesale | Current
Financing Receivable, Recorded Investment, Past Due
Financing receivable, not past due	791,826	489,556	1,352,084
Wholesale | 31-60 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	128	166	2,051
Wholesale | 61-90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	22	23	1,437
Wholesale | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	$ 52	$ 4	$ 3,084