Finance Receivables (Recorded Investment Of Retail and Wholesale Finance Receivables By Credit Quality Indicator) (Detail) - USD ($) $ in Thousands	Jun. 25, 2017	Dec. 31, 2016	Jun. 26, 2016
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	$ 7,526,063	$ 7,008,801	$ 7,443,398
Retail
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	6,267,211	5,982,211	6,020,750
Retail | Prime
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	5,034,187	4,768,420	4,756,479
Retail | Sub-prime
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	1,233,024	1,213,791	1,264,271
Wholesale
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	1,258,852	1,026,590	1,422,648
Wholesale | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	5,203	1,333	0
Wholesale | Substandard
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	10,458	1,773	19,637
Wholesale | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	4,953	30,152	4,334
Wholesale | Medium Risk
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	8,115	14,620	6,350
Wholesale | Low Risk
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	$ 1,230,123	$ 978,712	$ 1,392,327