v3.26.3
Postemployment Benefits - Postretirement Benefit Plans Net Cost/(Benefit) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 26, 2026
Mar. 28, 2026
Sep. 27, 2025
Sep. 26, 2026
Sep. 27, 2025
Postretirement Plans          
Defined Benefit Plan Disclosure [Line Items]          
Service cost $ 0   $ 1 $ 1 $ 2
Interest cost 5   7 16 22
Expected return on plan assets (7)   (12) (23) (35)
Amortization of prior service costs/(credits) (3)   (3) (8) (9)
Amortization of unrecognized losses/(gains) (6)   (7) (18) (20)
Settlements 0 $ 45 0 45 0
Net postretirement cost/(benefit) (11)   (14) (77) (40)
Pension Plans | U.S. Plans          
Defined Benefit Plan Disclosure [Line Items]          
Service cost 0   0 1 1
Interest cost 27   28 81 93
Expected return on plan assets (44)   (44) (132) (143)
Amortization of prior service costs/(credits) 0   0 0 1
Amortization of unrecognized losses/(gains) 0   0 0 0
Net postretirement cost/(benefit) (17)   (15) (50) (37)
Pension Plans | Non-U.S. Plans          
Defined Benefit Plan Disclosure [Line Items]          
Service cost 1   2 3 4
Interest cost 14   15 41 43
Expected return on plan assets (19)   (24) (57) (66)
Amortization of prior service costs/(credits) 1   1 3 2
Amortization of unrecognized losses/(gains) 3   4 9 11
Net postretirement cost/(benefit) $ 0   $ (2) $ (1) $ (6)