Finance Receivables - Changes In Allowance For Credit Losses On Finance Receivables (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 26, 2021	Sep. 27, 2020	Sep. 26, 2021	Sep. 27, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	$ 358,811	$ 411,015	$ 390,936	$ 198,581
Provision for credit losses	11,208	7,835	4,935	178,433
Charge-offs	(24,670)	(22,820)	(76,366)	(107,894)
Recoveries	10,485	12,672	36,329	38,978
Balance, end of period	355,834	408,702	355,834	408,702
Cumulative Effect, Period Of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period		0		100,604
Retail
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	342,490	389,758	371,738	188,501
Provision for credit losses	13,861	8,024	10,465	172,491
Charge-offs	(24,670)	(20,378)	(76,366)	(105,452)
Recoveries	10,335	12,672	36,179	38,978
Balance, end of period	342,016	390,076	342,016	390,076
Retail | Cumulative Effect, Period Of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period		0		95,558
Wholesale
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period	16,321	21,257	19,198	10,080
Provision for credit losses	(2,653)	(189)	(5,530)	5,942
Charge-offs	0	(2,442)	0	(2,442)
Recoveries	150	0	150	0
Balance, end of period	$ 13,818	18,626	$ 13,818	18,626
Wholesale | Cumulative Effect, Period Of Adoption, Adjustment
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Balance, beginning of period		$ 0		$ 5,046