Partnership Capital Subject to Mandatory Redemption - Roll Forward of Outstanding Partnership Loans (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 26, 2020	Jun. 28, 2019
Partners Capital Notes [Abstract]
Partnership loans outstanding at beginning of year	$ 360	$ 332
Partnership loans issued during the period	163	164
Repayment of Partnership loans during the period	(135)	(97)
Partnership loans outstanding at end of period	$ 388	$ 399