Finance Receivables - Finance Receivables, Net (Details) - USD ($) $ in Thousands	Sep. 27, 2020	Jun. 28, 2020	Dec. 31, 2019	Sep. 29, 2019	Jun. 30, 2019	Dec. 31, 2018
Accounts, Notes, Loans and Financing Receivable
Financing receivable, gross	$ 7,252,194		$ 7,572,947	$ 7,714,156
Allowance for credit losses	(408,702)	$ (411,015)	(198,581)	(198,576)	$ (194,996)	$ (189,885)
Total allowance for credit loss	6,843,492		7,374,366	7,515,580
Retail
Accounts, Notes, Loans and Financing Receivable
Financing receivable, gross	6,585,298		6,416,428	6,642,809
Allowance for credit losses	(390,076)	(389,758)	(188,501)	(191,626)	(186,722)	(182,098)
Wholesale
Accounts, Notes, Loans and Financing Receivable
Financing receivable, gross	666,896		1,156,519	1,071,347
Allowance for credit losses	$ (18,626)	$ (21,257)	$ (10,080)	$ (6,950)	$ (8,274)	$ (7,787)