Partnership Capital - Roll Forward of Outstanding Partnership Loans (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 25, 2016	Mar. 27, 2015
Other Liabilities Disclosure [Abstract]
Partnership loans outstanding at beginning of period	$ 218	$ 198
Partnership loans issued during the period	139	119
Repayment of Partnership loans during the period	(60)	(67)
Partnership loans outstanding at end of period	$ 297	$ 250