POSTRETIREMENT BENEFIT PLANS - Narrative (Details) $ in Millions |
3 Months Ended | 6 Months Ended | ||
---|---|---|---|---|
Jun. 30, 2021
USD ($)
category
|
Jun. 30, 2020
USD ($)
|
Jun. 30, 2021
USD ($)
category
|
Jun. 30, 2020
USD ($)
|
|
Defined Benefit Plan Disclosure [Line Items] | ||||
Number of categories | category | 3 | 3 | ||
Defined contribution plan costs | $ 113 | $ 87 | $ 221 | $ 182 |
Principal retiree benefit plans | ||||
Defined Benefit Plan Disclosure [Line Items] | ||||
Plans cost (income) | (42) | (22) | (82) | (54) |
Other pension plans | ||||
Defined Benefit Plan Disclosure [Line Items] | ||||
Plans cost (income) | $ 37 | $ 2 | 13 | $ 9 |
Curtailment loss | $ 77 |