Finance Receivables (Recorded Investment Of Retail and Wholesale Finance Receivables By Credit Quality Indicator) (Detail) - USD ($) $ in Thousands	Mar. 26, 2017	Dec. 31, 2016	Mar. 27, 2016
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	$ 7,330,152	$ 7,008,801	$ 7,532,750
Retail
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	6,002,550	5,982,211	6,012,804
Retail | Prime
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	4,806,730	4,768,420	4,798,394
Retail | Sub-prime
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	1,195,820	1,213,791	1,214,410
Wholesale
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	1,327,602	1,026,590	1,519,946
Wholesale | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	1,133	1,333	0
Wholesale | Substandard
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	9,213	1,773	24,391
Wholesale | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	19,898	30,152	7,220
Wholesale | Medium Risk
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	14,648	14,620	11,610
Wholesale | Low Risk
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	$ 1,282,710	$ 978,712	$ 1,476,725