POSTRETIREMENT BENEFIT PLANS - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($) category	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) category	Sep. 30, 2021 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of categories | category	3		3
Defined contribution plan costs	$ 109	$ 99	$ 333	$ 321
Principal retiree benefit plans
Defined Benefit Plan Disclosure [Line Items]
Plans cost (income)	(53)	(43)	(158)	(125)
Other pension plans
Defined Benefit Plan Disclosure [Line Items]
Plans cost (income)	$ (94)	$ (57)	$ (310)	(44)
Curtailment loss				$ 77