Finance Receivables (Allowance For Credit Losses And Finance Receivables By Portfolio Individually And Collectively Evaluated For Impairment) (Detail) - USD ($)	Mar. 27, 2016	Dec. 31, 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	156,184,000	147,178,000	132,820,000
Total allowance for credit losses	156,184,000	147,178,000	132,820,000	$ 127,364,000
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	7,532,750,000	7,015,331,000	6,981,412,000
Financing Receivable, Gross	7,532,750,000	7,015,331,000	6,981,412,000
Wholesale [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	9,457,000	7,858,000	9,043,000
Total allowance for credit losses	9,457,000	7,858,000	9,043,000	5,339,000
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	1,519,946,000	1,023,860,000	1,404,854,000
Financing Receivable, Gross	1,519,946,000	1,023,860,000	1,404,854,000
Retail [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	146,727,000	139,320,000	123,777,000
Total allowance for credit losses	146,727,000	139,320,000	123,777,000	$ 122,025,000
Individually evaluated for impairment	0	0	0
Collectively evaluated for impairment	6,012,804,000	5,991,471,000	5,576,558,000
Financing Receivable, Gross	6,012,804,000	5,991,471,000	5,576,558,000
Nonperforming Financing Receivable [Member] | Wholesale [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Individually evaluated for impairment	$ 0	$ 0	$ 0