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Reconciliation of the Change in Fair Value of the Pension Plan Assets Calculated based on Level 3 Inputs (Detail) - Significant Unobservable Inputs (Level 3) - United Kingdom $ in Millions	12 Months Ended
	Dec. 28, 2024 USD ($)
Schedule of Pension Plan Assets by Fair Value [Line Items]
Balance at December 30, 2023	$ 165
Realized loss	(19)
Balance at December 28, 2024	$ 146

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Schedule of Pension Plan Assets by Fair Value [Line Items]

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Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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