Finance Receivables - Aging Of Past Due Finance Receivables Including Non Accrual Status Finance Receivables (Details) - USD ($) $ in Thousands	Jun. 28, 2020	Dec. 31, 2019	Jun. 30, 2019
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	$ 101,017	$ 248,601	$ 193,155
Total	7,391,006	7,572,947	7,789,401
Current
Financing Receivable, Recorded Investment, Past Due
Financing receivable, not past due	7,289,989	7,324,346	7,596,246
31-60 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	64,451	143,624	120,347
61-90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	17,044	54,379	40,335
Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	19,522	50,598	32,473
Retail
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	95,841	244,498	190,208
Total	6,520,919	6,416,428	6,549,707
Retail | Current
Financing Receivable, Recorded Investment, Past Due
Financing receivable, not past due	6,425,078	6,171,930	6,359,499
Retail | 31-60 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	63,190	142,479	119,770
Retail | 61-90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	16,631	53,995	40,015
Retail | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	16,020	48,024	30,423
Wholesale
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	5,176	4,103	2,947
Total	870,087	1,156,519	1,239,694
Wholesale | Current
Financing Receivable, Recorded Investment, Past Due
Financing receivable, not past due	864,911	1,152,416	1,236,747
Wholesale | 31-60 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	1,261	1,145	577
Wholesale | 61-90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	413	384	320
Wholesale | Greater than 90 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Financing receivable, past due	$ 3,502	$ 2,574	$ 2,050