Partnership Capital - Roll Forward of Outstanding Partnership Loans (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 25, 2015
Other Liabilities Disclosure [Abstract]
Partnership loans outstanding at beginning of period	$ 218	$ 198
Partnership loans issued during the period	146	119
Repayment of Partnership loans during the period	(97)	(101)
Partnership loans outstanding at end of period	$ 267	$ 216