Finance Receivables (Changes In Allowance For Credit Losses On Finance Receivables) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Apr. 01, 2018
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	$ 189,885	$ 192,471
Provision for credit losses	34,491	30,052
Charge-offs	(44,721)	(45,081)
Recoveries	11,217	12,908
Balance, end of period	190,872	190,350
Retail
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	182,098	186,254
Provision for credit losses	32,832	28,069
Charge-offs	(44,721)	(45,081)
Recoveries	11,217	12,908
Balance, end of period	181,426	182,150
Wholesale
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of period	7,787	6,217
Provision for credit losses	1,659	1,983
Charge-offs	0	0
Recoveries	0	0
Balance, end of period	$ 9,446	$ 8,200