Partnership Capital - Roll Forward of Outstanding Partnership Loans (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 25, 2016
Partners Capital Notes [Abstract]
Partnership loans outstanding at beginning of period	$ 266	$ 218
Partnership loans issued during the period	140	139
Repayment of Partnership loans during the period	(71)	(60)
Partnership loans outstanding at end of period	$ 335	$ 297