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Components of Net Periodic Pension Benefit (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 25, 2021	Sep. 26, 2020	Sep. 25, 2021	Sep. 26, 2020
North America
Defined Benefit Plan Disclosure [Line Items]
Interest cost	$ 5	$ 7	$ 15	$ 21
Expected return on plan assets	(7)	(8)	(22)	(24)
Net periodic pension benefit	(2)	(1)	(7)	(3)
United Kingdom
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0	0	0
Interest cost	1	2	3	4
Expected return on plan assets	$ (1)	$ (2)	(4)	$ (4)
Net periodic pension benefit			$ (1)

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