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Retirement Benefits (Schedule of Net Periodic Pension Benefit) (Details) - U.K. - Pension Plan - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jul. 04, 2025
Jun. 28, 2024
Jul. 04, 2025
Jun. 28, 2024
Defined Benefit Plan Disclosure [Line Items]        
Interest cost $ 15 $ 15 $ 30 $ 30
Expected return on plan assets (28) (28) (54) (56)
Amortization of prior service cost 1 0 1 0
Recognized actuarial loss 1 1 2 2
Net periodic pension benefit $ (11) $ (12) $ (21) $ (24)