Finance Receivables (Recorded Investment Of Retail and Wholesale Finance Receivables By Credit Quality Indicator) (Detail) - USD ($) $ in Thousands	Sep. 25, 2016	Dec. 31, 2015	Sep. 27, 2015
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	$ 7,321,482	$ 7,015,331	$ 7,223,729
Retail
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	6,165,999	5,991,471	6,194,332
Retail | Prime
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	4,900,752	4,777,448	4,936,438
Retail | Sub-prime
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	1,265,247	1,214,023	1,257,894
Wholesale
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	1,155,483	1,023,860	1,029,397
Wholesale | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	0	5,169	0
Wholesale | Substandard
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	16,244	21,774	14,949
Wholesale | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	0	6,271	3,706
Wholesale | Medium Risk
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	7,667	11,494	6,496
Wholesale | Low Risk
Financing Receivable, Recorded Investment [Line Items]
Financing receivable, gross	$ 1,131,572	$ 979,152	$ 1,004,246