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Retirement Plans - Plans with Accumulated/Projected Benefit Obligations Exceeding Fair Value of Plan Assets (Details) - USD ($)
$ in Millions
Dec. 28, 2024
Dec. 30, 2023
Pension plans with accumulated benefit obligations exceeding the fair value of plan assets    
Accumulated benefit obligation $ 316 $ 336
Fair value of plan assets 0 0
Pension plans with projected benefit obligation exceeding the fair value of plan assets    
Projected benefit obligation 327 652
Fair value of plan assets $ 0 $ 292