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PENSION AND OTHER POSTRETIREMENT BENEFITS - Income Statement Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 29, 2017 | Jan. 03, 2020 | Jan. 01, 2021 | Jun. 28, 2019 | Jun. 29, 2018
Net periodic benefit income |  |  |  |  |
Service cost |  | $ 43 | $ 67 |  |
Interest cost |  | 154 | 283 |  |
Other changes in plan assets and benefit obligations recognized in other comprehensive loss |  |  |  |  |
Gain on pension plan curtailment |  | 23 | 0 | $ 0 | $ 0
Pension |  |  |  |  |
Net periodic benefit income |  |  |  |  |
Service cost |  | 42 | 65 | 36 | 39
Interest cost |  | 149 | 273 | 209 | 195
Expected return on plan assets |  | (314) | (630) | (382) | (369)
Amortization of net actuarial loss |  | 1 | 10 | 0 | 0
Amortization of prior service credit |  | (5) | (28) | 0 | 0
Cost for special termination benefits |  | 0 | 1 | 0 | 0
Effect of curtailments or settlements |  | (18) | 0 | 1 | 0
Net periodic benefit income |  | (145) | (309) | (136) | (135)
Other changes in plan assets and benefit obligations recognized in other comprehensive loss |  |  |  |  |
Net actuarial loss (gain) |  | 55 | 403 | 625 | (106)
Prior service cost (credit) |  | (292) | 1 | 3 | 2
Amortization of net actuarial loss |  | (5) | (10) | 0 | 0
Amortization of prior service credit (cost) |  | 5 | 28 | (1) | 0
Currency translation adjustment |  | 0 | 2 | 0 | 0
Recognized net loss due to divestiture |  | (13) | 0 | 0 | 0
Total change recognized in other comprehensive loss |  | (250) | 424 | 627 | (104)
Total impact from net periodic benefit cost and changes in other comprehensive loss |  | (395) | $ 115 | 491 | (239)
Pension | U.S. | L3 |  |  |  |  |
Other changes in plan assets and benefit obligations recognized in other comprehensive loss |  |  |  |  |
Cash balance benefit percentage |  |  | 1.00% |  |
Gain on pension plan curtailment |  | 23 |  |  |
Loss on pension plan settlement |  | 5 |  |  |
Other Benefits |  |  |  |  |
Net periodic benefit income |  |  |  |  |
Service cost |  | 1 | $ 2 | 0 | 1
Interest cost |  | 5 | 10 | 8 | 7
Expected return on plan assets |  | (10) | (21) | (16) | (16)
Amortization of net actuarial loss |  | (3) | (3) | (6) | (1)
Net periodic benefit income |  | (7) | (12) | (14) | (9)
Other changes in plan assets and benefit obligations recognized in other comprehensive loss |  |  |  |  |
Net actuarial loss (gain) |  | (1) | 4 | 4 | (20)
Amortization of prior service credit (cost) |  | 0 | 8 | 0 | 0
Amortization of net actuarial gain | $ 3 | 3 |  | 6 | 1
Total change recognized in other comprehensive loss |  | 2 | 15 | 10 | (19)
Total impact from net periodic benefit cost and changes in other comprehensive loss |  | $ (5) | $ 3 | $ (4) | $ (28)

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