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Financial Instruments - Fair Values of Financial Assets and Liabilities - Debt AFS (Detail) - Fair Value, Inputs, Level 3 - USD ($)
$ in Millions
Sep. 06, 2025
Dec. 28, 2024
Assets    
Debt Securities, Available-for-Sale [Line Items]    
Debt Securities, Available-for-Sale $ 2,344 $ 1,041
Liability    
Debt Securities, Available-for-Sale [Line Items]    
Debt Securities, Available-for-Sale $ 0 $ 0