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BUSINESS SEGMENT INFORMATION - Revenues and Income From Continuing Operations by Segment (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 28, 2024 | Jun. 30, 2023 | Jun. 28, 2024 | Jun. 30, 2023
Segment Reporting Information [Line Items] |  |  |  |  |
Revenue |  | $ 5,299 | $ 4,693 | $ 10,510 | $ 9,164
Segment operating income (loss) |  | 476 | 400 | 854 | 793
Non-service FAS pension income and other, net | [1] | 86 | 83 | 174 | 165
Interest expense, net |  | (172) | (111) | (348) | (213)
Income before income taxes |  | 390 | 372 | 680 | 745
Pension |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
FAS pension service cost |  | (9) | (6) | (17) | (12)
Non-service FAS pension income |  | (74) | (70) | (148) | (140)
Pension | Plans Under US Government Contracts |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
FAS pension service cost |  | (10) | (7) | (18) | (13)
Less: CAS pension cost |  | (16) | (30) | (31) | (58)
FAS/CAS operating adjustment |  | 6 | 23 | 13 | 45
Non-service FAS pension income |  | 81 | 77 | 161 | 154
FAS/CAS pension adjustment, net |  | 87 | 100 | 174 | 199
Operating segments |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment operating income (loss) |  | 825 | 655 | 1,613 | 1,293
Operating segments | SAS |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenue |  | 1,707 | 1,715 | 3,458 | 3,370
Segment operating income (loss) |  | 215 | 168 | 431 | 355
Operating segments | IMS |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenue |  | 1,729 | 1,735 | 3,398 | 3,435
Segment operating income (loss) |  | 206 | 162 | 396 | 347
Operating segments | CS |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenue |  | 1,346 | 1,289 | 2,640 | 2,452
Segment operating income (loss) |  | 329 | 325 | 639 | 591
Operating segments | AR |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenue |  | 581 |  | 1,123 |
Segment operating income (loss) |  | 75 |  | 147 |
Intersegment |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenue |  | (64) | (46) | (109) | (93)
Intersegment | SAS |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenue |  | (13) | (10) | (28) | (23)
Intersegment | IMS |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenue |  | (29) | (24) | (45) | (45)
Intersegment | CS |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenue |  | (22) | (12) | (36) | (25)
Intersegment | AR |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenue |  | 0 |  | 0 |
Corporate |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment operating income (loss) |  | $ (349) | $ (255) | $ (759) | $ (500)
[1] | “FAS” is defined as Financial Accounting Standards.

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