Partnership Capital Subject to Mandatory Redemption - Roll Forward of Outstanding Partnership Loans (Detail) - USD ($) $ in Millions	6 Months Ended
	Jun. 25, 2021	Jun. 26, 2020
Partners Capital Notes [Abstract]
Partnership loans outstanding at beginning of year	$ 341	$ 360
Partnership loans issued during the period	220	163
Repayment of Partnership loans during the period	(166)	(135)
Partnership loans outstanding at end of period	$ 395	$ 388