Annual report pursuant to Section 13 and 15(d)

PENSIONS AND OTHER POSTRETIREMENT BENEFITS - Fair Value of Plan Assets (Details)

v3.22.4
PENSIONS AND OTHER POSTRETIREMENT BENEFITS - Fair Value of Plan Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category $ 4,338 $ 5,606 $ 5,332
OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 728 812 783
Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 1,553 2,416  
Quoted Prices in Active Markets for Identical Assets (Level 1) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 324 362  
Significant  Other Observable Inputs (Level 2) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 678 747  
Significant  Other Observable Inputs (Level 2) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 196 209  
Significant Unobservable Inputs (Level 3) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 912 904 $ 670
Significant Unobservable Inputs (Level 3) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 35 42  
Investments Measured at Net Asset Value | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 1,195 1,539  
Investments Measured at Net Asset Value | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 173 199  
U.S. equities | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 1,133 1,932  
U.S. equities | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 113 129  
U.S. equities | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 564 1,157  
U.S. equities | Quoted Prices in Active Markets for Identical Assets (Level 1) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 24 26  
U.S. equities | Significant  Other Observable Inputs (Level 2) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
U.S. equities | Significant  Other Observable Inputs (Level 2) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
U.S. equities | Significant Unobservable Inputs (Level 3) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
U.S. equities | Significant Unobservable Inputs (Level 3) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
U.S. equities | Investments Measured at Net Asset Value | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 569 775  
U.S. equities | Investments Measured at Net Asset Value | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 89 103  
Global equities | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 434 734  
Global equities | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 47 54  
Global equities | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 328 617  
Global equities | Quoted Prices in Active Markets for Identical Assets (Level 1) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 5 6  
Global equities | Significant  Other Observable Inputs (Level 2) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Global equities | Significant  Other Observable Inputs (Level 2) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Global equities | Significant Unobservable Inputs (Level 3) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Global equities | Significant Unobservable Inputs (Level 3) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Global equities | Investments Measured at Net Asset Value | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 106 117  
Global equities | Investments Measured at Net Asset Value | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 42 48  
U.S. government securities | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 530 500  
U.S. government securities | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 228 191  
U.S. government securities | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 87 140  
U.S. government securities | Quoted Prices in Active Markets for Identical Assets (Level 1) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 149 111  
U.S. government securities | Significant  Other Observable Inputs (Level 2) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 380 310  
U.S. government securities | Significant  Other Observable Inputs (Level 2) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 79 80  
U.S. government securities | Significant Unobservable Inputs (Level 3) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
U.S. government securities | Significant Unobservable Inputs (Level 3) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
U.S. government securities | Investments Measured at Net Asset Value | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 63 50  
U.S. government securities | Investments Measured at Net Asset Value | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
U.S. corporate bonds | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 1,213 1,376  
U.S. corporate bonds | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 263 348  
U.S. corporate bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 574 502  
U.S. corporate bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 146 219  
U.S. corporate bonds | Significant  Other Observable Inputs (Level 2) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 266 371  
U.S. corporate bonds | Significant  Other Observable Inputs (Level 2) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 117 129  
U.S. corporate bonds | Significant Unobservable Inputs (Level 3) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
U.S. corporate bonds | Significant Unobservable Inputs (Level 3) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
U.S. corporate bonds | Investments Measured at Net Asset Value | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 373 503  
U.S. corporate bonds | Investments Measured at Net Asset Value | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Non U.S. and other bonds | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 32 66  
Non U.S. and other bonds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Non U.S. and other bonds | Significant  Other Observable Inputs (Level 2) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 32 66  
Non U.S. and other bonds | Significant Unobservable Inputs (Level 3) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Non U.S. and other bonds | Investments Measured at Net Asset Value | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Hedge funds | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 115 125  
Hedge funds | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 14 15  
Hedge funds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Hedge funds | Quoted Prices in Active Markets for Identical Assets (Level 1) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Hedge funds | Significant  Other Observable Inputs (Level 2) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Hedge funds | Significant  Other Observable Inputs (Level 2) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Hedge funds | Significant Unobservable Inputs (Level 3) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 115 125  
Hedge funds | Significant Unobservable Inputs (Level 3) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 14 15  
Hedge funds | Investments Measured at Net Asset Value | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Hedge funds | Investments Measured at Net Asset Value | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Private equity | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 143 151  
Private equity | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Private equity | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Private equity | Quoted Prices in Active Markets for Identical Assets (Level 1) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Private equity | Significant  Other Observable Inputs (Level 2) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Private equity | Significant  Other Observable Inputs (Level 2) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Private equity | Significant Unobservable Inputs (Level 3) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 143 151  
Private equity | Significant Unobservable Inputs (Level 3) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Private equity | Investments Measured at Net Asset Value | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Private equity | Investments Measured at Net Asset Value | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Structured credit | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 298 315  
Structured credit | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 9 10  
Structured credit | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Structured credit | Quoted Prices in Active Markets for Identical Assets (Level 1) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Structured credit | Significant  Other Observable Inputs (Level 2) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Structured credit | Significant  Other Observable Inputs (Level 2) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Structured credit | Significant Unobservable Inputs (Level 3) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 298 315  
Structured credit | Significant Unobservable Inputs (Level 3) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 9 10  
Structured credit | Investments Measured at Net Asset Value | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Structured credit | Investments Measured at Net Asset Value | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Real estate | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 356 313  
Real estate | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 12 17  
Real estate | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Real estate | Quoted Prices in Active Markets for Identical Assets (Level 1) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Real estate | Significant  Other Observable Inputs (Level 2) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Real estate | Significant  Other Observable Inputs (Level 2) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Real estate | Significant Unobservable Inputs (Level 3) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 356 313  
Real estate | Significant Unobservable Inputs (Level 3) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 12 17  
Real estate | Investments Measured at Net Asset Value | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Real estate | Investments Measured at Net Asset Value | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Absolute return fixed income | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 84 94  
Absolute return fixed income | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 42 48  
Absolute return fixed income | Quoted Prices in Active Markets for Identical Assets (Level 1) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Absolute return fixed income | Quoted Prices in Active Markets for Identical Assets (Level 1) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Absolute return fixed income | Significant  Other Observable Inputs (Level 2) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Absolute return fixed income | Significant  Other Observable Inputs (Level 2) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Absolute return fixed income | Significant Unobservable Inputs (Level 3) | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Absolute return fixed income | Significant Unobservable Inputs (Level 3) | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 0 0  
Absolute return fixed income | Investments Measured at Net Asset Value | Pension Benefits      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category 84 94  
Absolute return fixed income | Investments Measured at Net Asset Value | OPEB      
Defined Benefit Plan, Information about Plan Assets [Abstract]      
Fair value of pension assets by asset category $ 42 $ 48