Finance Receivables (Allowance For Credit Losses And Finance Receivables By Portfolio Individually And Collectively Evaluated For Impairment) (Detail) - USD ($)	Jun. 26, 2016	Mar. 27, 2016	Dec. 31, 2015	Jun. 28, 2015	Mar. 29, 2015	Dec. 31, 2014
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	$ 0		$ 0	$ 0
Collectively evaluated for impairment	161,353,000		147,178,000	139,231,000
Total allowance for credit losses	161,353,000	$ 156,184,000	147,178,000	139,231,000	$ 132,820,000	$ 127,364,000
Individually evaluated for impairment	0		0	0
Collectively evaluated for impairment	7,443,398,000		7,015,331,000	7,287,726,000
Financing receivable, gross	7,443,398,000		7,015,331,000	7,287,726,000
Retail
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0		0	0
Collectively evaluated for impairment	152,998,000		139,320,000	131,903,000
Total allowance for credit losses	152,998,000	146,727,000	139,320,000	131,903,000	123,777,000	122,025,000
Individually evaluated for impairment	0		0	0
Collectively evaluated for impairment	6,020,750,000		5,991,471,000	5,962,685,000
Financing receivable, gross	6,020,750,000		5,991,471,000	5,962,685,000
Wholesale
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0		0	0
Collectively evaluated for impairment	8,355,000		7,858,000	7,328,000
Total allowance for credit losses	8,355,000	$ 9,457,000	7,858,000	7,328,000	$ 9,043,000	$ 5,339,000
Individually evaluated for impairment	0		0	0
Collectively evaluated for impairment	1,422,648,000		1,023,860,000	1,325,041,000
Financing receivable, gross	$ 1,422,648,000		$ 1,023,860,000	$ 1,325,041,000