Partnership Capital - Roll Forward of Outstanding Partnership Loans (Detail) - USD ($) $ in Millions	9 Months Ended
	Sep. 29, 2017	Sep. 30, 2016
Partners Capital Notes [Abstract]
Partnership loans outstanding at beginning of period	$ 266	$ 218
Partnership loans issued during the period	142	146
Repayment of Partnership loans during the period	(110)	(97)
Partnership loans outstanding at end of period	$ 298	$ 267