Asset-Backed Financing (Schedule of Loans Acquired in Transfer Not Accounted For as Debt Securities) (Detail) - Secured Debt - Variable Interest Entity, Not Primary Beneficiary - Asset-backed Canadian commercial paper conduit facility - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 25, 2016	Jun. 26, 2016	Mar. 27, 2016	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Sep. 25, 2016	Sep. 27, 2015
Variable Interest Entity [Line Items]
Transfers on finance receivables	$ 0	$ 31,400	$ 6,600	$ 33,100	$ 26,800	$ 19,200	$ 38,000	$ 79,100
Foreign Line of Credit
Variable Interest Entity [Line Items]
Proceeds on finance receivables	$ 0	$ 27,500	$ 5,800	$ 29,000	$ 23,400	$ 16,800	$ 33,300	$ 69,200