Partnership Capital - Roll Forward of Outstanding Partnership Loans (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 28, 2018	Sep. 29, 2017
Partners Capital Notes [Abstract]
Partnership loans outstanding at beginning of period	$ 297	$ 266
Partnership loans issued during the period	170	142
Repayment of Partnership loans during the period	(118)	(110)
Partnership loans outstanding at end of period	$ 349	$ 298