Finance Receivables - Recorded Investment Of Retail and Wholesale Finance Receivables By Credit Quality Indicator (Details) - USD ($) $ in Thousands	Mar. 28, 2021	Dec. 31, 2020	Mar. 29, 2020
Financing Receivable, Recorded Investment
Total	$ 7,103,010	$ 6,833,944	$ 7,627,903
Wholesale
Financing Receivable, Recorded Investment
2021	600,711	391,151	677,536
2020	124,228	72,048	606,317
2019	45,293	13,443	51,863
2018	12,585	7,887	11,315
2017	6,392	2,297	6,348
2016 & Prior	2,819	2,923	5,277
Total	792,028	489,749	1,358,656
Wholesale | Non-Performing
Financing Receivable, Recorded Investment
2021	0	0	0
2020	0	0	2,376
2019	0	0	1,774
2018	0	0	107
2017	0	0	25
2016 & Prior	0	0	43
Total	0	0	4,325
Wholesale | Doubtful
Financing Receivable, Recorded Investment
2021	0	0	478
2020	0	0	4,169
2019	0	0	529
2018	0	0	51
2017	0	0	0
2016 & Prior	0	0	726
Total	0	0	5,953
Wholesale | Substandard
Financing Receivable, Recorded Investment
2021	0	0	5,375
2020	0	0	6,374
2019	0	0	391
2018	0	0	131
2017	0	0	0
2016 & Prior	0	0	0
Total	0	0	12,271
Wholesale | Special Mention
Financing Receivable, Recorded Investment
2021	567	658	5,239
2020	530	365	8,001
2019	262	31	977
2018	17	0	6
2017	0	0	0
2016 & Prior	0	0	1,268
Total	1,376	1,054	15,491
Wholesale | Medium Risk
Financing Receivable, Recorded Investment
2021	0	1,925	8,307
2020	728	242	10,996
2019	417	0	1,091
2018	0	0	23
2017	0	0	0
2016 & Prior	0	0	826
Total	1,145	2,167	21,243
Wholesale | Low Risk
Financing Receivable, Recorded Investment
2021	600,144	388,568	658,137
2020	122,970	71,441	574,401
2019	44,614	13,412	47,101
2018	12,568	7,887	10,997
2017	6,392	2,297	6,323
2016 & Prior	2,819	2,923	2,414
Total	$ 789,507	$ 486,528	$ 1,299,373