Finance Receivables (Allowance For Credit Losses And Finance Receivables By Portfolio Individually And Collectively Evaluated For Impairment) (Detail) - USD ($)	Sep. 27, 2015	Mar. 29, 2015	Dec. 31, 2014	Sep. 28, 2014	Mar. 30, 2014	Dec. 31, 2013
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	$ 0		$ 0	$ 0
Collectively evaluated for impairment	145,383,000		127,364,000	126,003,000
Total allowance for credit losses	145,383,000	$ 139,231,000	127,364,000	126,003,000	$ 122,355,000	$ 110,693,000
Individually evaluated for impairment	0		0	0
Collectively evaluated for impairment	7,223,729,000		6,560,245,000	6,791,503,000
Total Finance Receivables	7,223,729,000		6,560,245,000	6,791,503,000
Wholesale [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0		0	0
Collectively evaluated for impairment	6,252,000		5,339,000	5,341,000
Total allowance for credit losses	6,252,000	7,328,000	5,339,000	5,341,000	7,456,000	4,630,000
Individually evaluated for impairment	0		0	0
Collectively evaluated for impairment	1,029,397,000		952,321,000	1,033,576,000
Total Finance Receivables	1,029,397,000		952,321,000	1,033,576,000
Retail [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0		0	0
Collectively evaluated for impairment	139,131,000		122,025,000	120,662,000
Total allowance for credit losses	139,131,000	$ 131,903,000	122,025,000	120,662,000	$ 114,899,000	$ 106,063,000
Individually evaluated for impairment	0		0	0
Collectively evaluated for impairment	6,194,332,000		5,607,924,000	5,757,927,000
Total Finance Receivables	6,194,332,000		5,607,924,000	5,757,927,000
Nonperforming Financing Receivable [Member] | Wholesale [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	$ 0		$ 0	$ 0