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SEGMENT FINANCIAL DATA (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract] |  |  |
Segment Reporting Segment Profit Loss | $ 6,665 | $ 7,739 | $ 8,190
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Interest and other financial charges | (359) | (357) | (367)
Repositioning and other charges | (575) | (546) | (1,091)
Income before taxes | 6,012 | 7,559 | 7,487
Other Postretirement Benefits [Member] |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Benefit plans income/(expense) | 58 | 48 | 34
Corporate [Member] |  |  |
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Abstract] |  |  |
Segment Reporting Segment Profit Loss | (96) | (256) | (281)
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Repositioning and other charges | (110) | (241) | (502)
Segment Reconciling Items [Member] |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Pension mark-to-market expense | (44) | (123) | (37)
Other income (expense) | (349) | 360 | (57)
Interest and other financial charges | (359) | (357) | (367)
Stock compensation expense | (168) | (153) | (175)
Repositioning and other charges | (575) | (546) | (1,091)
Income before taxes | 6,012 | 7,559 | 7,487
Segment Reconciling Items [Member] | Pension Plan [Member] |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Benefit plans income/(expense) | 785 | 592 | 992
Segment Reconciling Items [Member] | Other Postretirement Benefits [Member] |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |
Benefit plans income/(expense) | $ 57 | $ 47 | $ 32

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