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Finance Receivables - Recorded Investment Of Retail and Wholesale Finance Receivables By Credit Quality Indicator (Details) - USD ($) $ in Thousands	Sep. 27, 2020	Dec. 31, 2019	Sep. 29, 2019
Financing Receivable, Recorded Investment
Total	$ 7,252,194	$ 7,572,947	$ 7,714,156
Wholesale
Financing Receivable, Recorded Investment
2020	509,204
2019	120,365
2018	18,809
2017	8,551
2016	5,525
2015 & Prior	4,442
Total	666,896	1,156,519	1,071,347
Wholesale \| Non-Performing
Financing Receivable, Recorded Investment
2020	0
2019	0
2018	0
2017	0
2016	0
2015 & Prior	0
Total	0
Wholesale \| Doubtful
Financing Receivable, Recorded Investment
2020	0
2019	0
2018	14
2017	0
2016	0
2015 & Prior	0
Total	14	11,664	4,964
Wholesale \| Substandard
Financing Receivable, Recorded Investment
2020	277
2019	238
2018	0
2017	0
2016	0
2015 & Prior	0
Total	515	6,122	752
Wholesale \| Special Mention
Financing Receivable, Recorded Investment
2020	2,316
2019	1,213
2018	160
2017	0
2016	0
2015 & Prior	1,139
Total	4,828	16,125	14,813
Wholesale \| Medium Risk
Financing Receivable, Recorded Investment
2020	1,283
2019	448
2018	33
2017	0
2016	0
2015 & Prior	0
Total	1,764	16,800	11,544
Wholesale \| Low Risk
Financing Receivable, Recorded Investment
2020	505,328
2019	118,466
2018	18,602
2017	8,551
2016	5,525
2015 & Prior	3,303
Total	$ 659,775	$ 1,105,808	$ 1,039,274