Finance Receivables - Aging Of Past Due Finance Receivables Including Non Accrual Status Finance Receivables (Details) - USD ($) $ in Thousands	Sep. 26, 2021	Dec. 31, 2020	Sep. 27, 2020
Financing Receivable, Recorded Investment, Past Due
Total	$ 7,219,092	$ 6,833,944	$ 7,252,194
Current
Financing Receivable, Recorded Investment, Past Due
Total	7,052,386	6,653,925	7,100,977
Total Past Due
Financing Receivable, Recorded Investment, Past Due
Total	166,706	180,019	151,217
31-60 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total	101,203	106,984	96,487
61-90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total	35,365	39,956	31,470
Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total	30,138	33,079	23,260
Retail
Financing Receivable, Recorded Investment, Past Due
Total	6,727,956	6,344,195	6,585,298
Retail | Current
Financing Receivable, Recorded Investment, Past Due
Total	6,561,412	6,164,369	6,434,642
Retail | Total Past Due
Financing Receivable, Recorded Investment, Past Due
Total	166,544	179,826	150,656
Retail | 31-60 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total	101,157	106,818	96,243
Retail | 61-90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total	35,273	39,933	31,467
Retail | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total	30,114	33,075	22,946
Wholesale
Financing Receivable, Recorded Investment, Past Due
Total	491,136	489,749	666,896
Wholesale | Current
Financing Receivable, Recorded Investment, Past Due
Total	490,974	489,556	666,335
Wholesale | Total Past Due
Financing Receivable, Recorded Investment, Past Due
Total	162	193	561
Wholesale | 31-60 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total	46	166	244
Wholesale | 61-90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total	92	23	3
Wholesale | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total	$ 24	$ 4	$ 314