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RETIREMENT BENEFITS - Statement of Operations Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 29, 2023 | Dec. 30, 2022 | Dec. 31, 2021
Operating |  |  |
Service cost | $ 35 | $ 46 |
Non-operating |  |  |
Interest cost | 397 | 227 |
Pension |  |  |
Operating |  |  |
Service cost | 33 | 44 | $ 66
Non-operating |  |  |
Interest cost | 386 | 220 | 188
Expected return on plan assets | (633) | (624) | (621)
Amortization of net actuarial (gain) loss | (9) | 9 | 30
Amortization of prior service credit | (26) | (27) | (28)
Effect of curtailments or settlements | 0 | 0 | 1
Non-service cost periodic benefit income | (282) | (422) | (430)
Net periodic benefit income | (249) | (378) | (364)
Other changes in plan assets and benefit obligations recognized in other comprehensive income |  |  |
Net actuarial gain | (90) | 42 | (972)
Prior service cost | 0 | 8 | 2
Amortization of net actuarial gain (loss) | 9 | (9) | (30)
Amortization of prior service credit | 26 | 27 | 28
Currency translation adjustment | 0 | 1 | 1
Recognized prior service credit | 0 | 0 | 4
Recognized net actuarial loss | 0 | 0 | (4)
Total change recognized in other comprehensive income | (55) | 69 | (971)
Total impact from net periodic benefit income and changes in other comprehensive income | (304) | (309) | (1,335)
Other Benefits |  |  |
Operating |  |  |
Service cost | 2 | 2 | 2
Non-operating |  |  |
Interest cost | 11 | 7 | 5
Expected return on plan assets | (20) | (20) | (20)
Amortization of net actuarial (gain) loss | (20) | (7) | 0
Amortization of prior service credit | 1 | 1 | 1
Non-service cost periodic benefit income | (28) | (19) | (14)
Net periodic benefit income | (26) | (17) | (12)
Other changes in plan assets and benefit obligations recognized in other comprehensive income |  |  |
Net actuarial gain | (18) | (34) | (46)
Prior service cost | 20 | 7 | 0
Amortization of net actuarial gain (loss) | (1) | (1) | (1)
Total change recognized in other comprehensive income | 1 | (28) | (47)
Total impact from net periodic benefit income and changes in other comprehensive income | $ (25) | $ (45) | $ (59)

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