Schedule Of Reconciliation Of Changes In Projected Benefit Obligation, Fair Value Of Plan Assets And Funded Status Of Plan (Detail) - United Kingdom - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Defined Benefit Plan Disclosure [Line Items]
Obligation at beginning of period	$ 257	$ 269
Interest cost	4	4	$ 5
Plan settlements		(7)
Benefits paid	(8)	(5)
Actuarial (gain) loss	(89)	(1)
Currency translation	(23)	(3)
Obligation at end of period	141	257	269
Fair value of plan assets at beginning of period	358	360
Actual return on plan assets	(130)	12
Company contributions	1	2
Benefits paid	(8)	(4)
Currency translation	(32)	(5)
Fair value of plan assets at end of period	189	358	$ 360
Net amount recognized	$ 48	$ 101