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RETIREMENT BENEFITS - PBO and ABO Exceed Fair Value of Plan Assets (Details) - Pension Plans - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
U.S.    
PBO exceeds fair value of plan assets    
Projected benefit obligation $ 545 $ 683
Accumulated benefit obligation 545 683
Fair value of plan assets 0 0
ABO exceeds fair value of plan assets    
Projected benefit obligation 545 683
Accumulated benefit obligation 545 682
Fair value of plan assets 0 0
Non-U.S.    
PBO exceeds fair value of plan assets    
Projected benefit obligation 3,463 3,966
Accumulated benefit obligation 3,179 3,574
Fair value of plan assets 2,374 2,616
ABO exceeds fair value of plan assets    
Projected benefit obligation 3,315 3,809
Accumulated benefit obligation 3,088 3,477
Fair value of plan assets $ 2,252 $ 2,486