Finance Receivables - Aging Of Past Due Finance Receivables Including Non Accrual Status Finance Receivables (Details) - USD ($) $ in Thousands	Sep. 27, 2020	Dec. 31, 2019	Sep. 29, 2019
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	$ 151,217	$ 248,601	$ 220,549
Total	7,252,194	7,572,947	7,714,156
Current
Financing Receivable, Recorded Investment, Past Due
Financing receivable, not past due	7,100,977	7,324,346	7,493,607
31-60 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	96,487	143,624	134,689
61-90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	31,470	54,379	48,242
Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	23,260	50,598	37,618
Retail
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	150,656	244,498	217,712
Total	6,585,298	6,416,428	6,642,809
Retail | Current
Financing Receivable, Recorded Investment, Past Due
Financing receivable, not past due	6,434,642	6,171,930	6,425,097
Retail | 31-60 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	96,243	142,479	134,074
Retail | 61-90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	31,467	53,995	48,033
Retail | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	22,946	48,024	35,605
Wholesale
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	561	4,103	2,837
Total	666,896	1,156,519	1,071,347
Wholesale | Current
Financing Receivable, Recorded Investment, Past Due
Financing receivable, not past due	666,335	1,152,416	1,068,510
Wholesale | 31-60 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	244	1,145	615
Wholesale | 61-90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	3	384	209
Wholesale | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	$ 314	$ 2,574	$ 2,013