POSTRETIREMENT BENEFIT PLANS - Narrative (Details) $ in Millions |
3 Months Ended | |
---|---|---|
Mar. 31, 2020
USD ($)
category
|
Mar. 31, 2019
USD ($)
|
|
Defined Benefit Plan Disclosure [Line Items] | ||
Number of categories | category | 3 | |
Defined contribution plan costs | $ 95 | $ 101 |
Other pension plans | ||
Defined Benefit Plan Disclosure [Line Items] | ||
Threshold to be included in other pension plans | 50 | |
Plans cost (income) | 10 | 7 |
Curtailment/settlement loss (gain) | 1 | (9) |
Principal retiree benefit plans | ||
Defined Benefit Plan Disclosure [Line Items] | ||
Plans cost (income) | (32) | $ (61) |
Curtailment/settlement loss (gain) | $ (33) |