Partnership Capital Subject to Mandatory Redemption - Roll Forward of Outstanding Partnership Loans (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 26, 2021	Mar. 27, 2020
Partners Capital Notes [Abstract]
Partnership loans outstanding at beginning of year	$ 341	$ 360
Partnership loans issued during the period	211	163
Repayment of Partnership loans during the period	(114)	(100)
Partnership loans outstanding at end of period	$ 438	$ 423