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EMPLOYEE BENEFIT PLANS (Schedule of Fair Value of Plan Assets) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | $ 19,720 | $ 18,716 |
Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Assets measured at NAV | 13 | 8 | $ 27
Pension Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 17,214 | 16,369 |
Assets measured at NAV | 17,211 | 16,369 | 21,895
Pension Plan | Short-term investments |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 651 | 587 |
Pension Plan | Global equity securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 1,270 | 1,430 |
Pension Plan | Real assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 472 | 426 |
Pension Plan | Fixed-income securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 8,741 | 8,040 |
Pension Plan | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 4,233 | 4,263 |
Pension Plan | Level 1 | Short-term investments |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 565 | 461 |
Pension Plan | Level 1 | Global equity securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 1,270 | 1,430 |
Pension Plan | Level 1 | Real assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 472 | 426 |
Pension Plan | Level 1 | Fixed-income securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 1,926 | 1,946 |
Pension Plan | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 6,888 | 6,212 |
Pension Plan | Level 2 | Short-term investments |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 86 | 126 |
Pension Plan | Level 2 | Global equity securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 0 | 0 |
Pension Plan | Level 2 | Real assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 0 | 0 |
Pension Plan | Level 2 | Fixed-income securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 6,802 | 6,086 |
Pension Plan | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 13 | 8 |
Pension Plan | Level 3 | Short-term investments |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 0 | 0 |
Pension Plan | Level 3 | Global equity securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 0 | 0 |
Pension Plan | Level 3 | Real assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 0 | 0 |
Pension Plan | Level 3 | Fixed-income securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 13 | 8 |
Pension Plan | Assets measured at NAV |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Assets measured at NAV | 6,080 | 5,886 |
PBOP Plans |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 2,506 | 2,347 |
Assets measured at NAV | 2,499 | 2,336 | $ 3,102
PBOP Plans | Short-term investments |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 30 | 26 |
PBOP Plans | Global equity securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 66 | 83 |
PBOP Plans | Real assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 32 | 29 |
PBOP Plans | Fixed-income securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 1,218 | 1,109 |
PBOP Plans | Level 1 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 550 | 544 |
PBOP Plans | Level 1 | Short-term investments |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 30 | 26 |
PBOP Plans | Level 1 | Global equity securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 66 | 83 |
PBOP Plans | Level 1 | Real assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 32 | 29 |
PBOP Plans | Level 1 | Fixed-income securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 422 | 406 |
PBOP Plans | Level 2 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 795 | 702 |
PBOP Plans | Level 2 | Short-term investments |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 0 | 0 |
PBOP Plans | Level 2 | Global equity securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 0 | 0 |
PBOP Plans | Level 2 | Real assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 0 | 0 |
PBOP Plans | Level 2 | Fixed-income securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 795 | 702 |
PBOP Plans | Level 3 |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 1 | 1 |
PBOP Plans | Level 3 | Short-term investments |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 0 | 0 |
PBOP Plans | Level 3 | Global equity securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 0 | 0 |
PBOP Plans | Level 3 | Real assets |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 0 | 0 |
PBOP Plans | Level 3 | Fixed-income securities |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Total plan assets at fair value | 1 | 1 |
PBOP Plans | Assets measured at NAV |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Assets measured at NAV | $ 1,160 | $ 1,100 |

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