PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS (Change in Projected Benefit Obligations, Plan Assets and Funded Status of All Significant Plans) (Details) - USD ($) $ in Millions	3 Months Ended			12 Months Ended
	Dec. 31, 2023	Jun. 30, 2023	Mar. 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plan, Change in Benefit Obligations [Roll Forward]
Actuarial changes in assumptions and experience			$ (1,268)
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year				$ 21,200
Defined Benefit Plan, Plan Assets, Payment for Settlement	$ 1,617
Defined Benefit Plan, Plan Assets, Payment for Settlement	(1,617)
Fair value of plan assets at end of year	19,600			19,600	$ 21,200
Pension Plan [Member]
Defined Benefit Plan, Change in Benefit Obligations [Roll Forward]
Benefit obligations at beginning of year				22,861	32,977
Service cost				272	392	$ 387
Interest cost				1,110	680	594
Plan participants' contributions				9	12
Actuarial changes in assumptions and experience				1,086	(8,433)
Benefits paid				(1,385)	(1,539)
Plan amendments				6	(25)
Defined Benefit Plan Business Combinations And Acquisitions Divestiture Other Benefit Obligation				6	(602)
Effect of foreign exchange rates				279	(600)
Termination Benefits/curtailment cost/settlements				(1,777)	(1)
Benefit obligations at end of year	22,467			22,467	22,861	32,977
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year				21,231	28,167
Actual return on plan assets				1,228	(4,556)
Employer contributions				142	235
Plan participants' contributions				9	12
Benefits paid				(1,385)	(1,539)
Defined Benefit Plan, Plan Assets, Payment for Settlement				1,777	0
Defined Benefit Plan, Plan Assets, Payment for Settlement				(1,777)	0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Assets Transferred to (from) Plan		$ (90)		(73)	(592)
Effect of foreign exchange rates				259	(496)
Fair value of plan assets at end of year	19,634			19,634	21,231	28,167
Defined Benefit Plan, Funded Status [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(2,833)			(2,833)	(1,630)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Assets for Plan Benefits, Defined Benefit Plan	889			889	1,035
Accrued and other current liabilities	(67)			(67)	(66)
Pension and other postretirement benefits - noncurrent	(3,655)			(3,655)	(2,599)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	(2,833)			(2,833)	(1,630)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]
Net loss (gain)	7,709			7,709	7,045
Prior service credit	(84)			(84)	(116)
Pretax balance in AOCL at end of year	7,625			7,625	6,929
Other Postretirement Benefit Plans
Defined Benefit Plan, Change in Benefit Obligations [Roll Forward]
Benefit obligations at beginning of year				893	1,251
Service cost				4	6	7
Interest cost				45	26	23
Plan participants' contributions				0	0
Actuarial changes in assumptions and experience				65	(318)
Benefits paid				(94)	(67)
Plan amendments				0	0
Defined Benefit Plan Business Combinations And Acquisitions Divestiture Other Benefit Obligation				0	0
Effect of foreign exchange rates				1	(5)
Termination Benefits/curtailment cost/settlements				0	0
Benefit obligations at end of year	914			914	893	1,251
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets at beginning of year				0	0
Actual return on plan assets				0	0
Employer contributions				0	0
Plan participants' contributions				0	0
Benefits paid				0	0
Defined Benefit Plan, Plan Assets, Payment for Settlement				0	0
Defined Benefit Plan, Plan Assets, Payment for Settlement				0	0
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Assets Transferred to (from) Plan				0	0
Effect of foreign exchange rates				0	0
Fair value of plan assets at end of year	0			0	0	$ 0
Defined Benefit Plan, Funded Status [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(914)			(914)	(893)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position [Abstract]
Assets for Plan Benefits, Defined Benefit Plan	0			0	0
Accrued and other current liabilities	(86)			(86)	(88)
Pension and other postretirement benefits - noncurrent	(828)			(828)	(805)
Defined Benefit Plan, Amounts for Asset (Liability) Recognized in Statement of Financial Position	(914)			(914)	(893)
Defined Benefit Plan, Accumulated Other Comprehensive (Income) Loss, before Tax [Abstract]
Net loss (gain)	(402)			(402)	(523)
Prior service credit	0			0	0
Pretax balance in AOCL at end of year	(402)			(402)	(523)
UNITED STATES
Defined Benefit Plan, Funded Status [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(1,192)			(1,192)	(545)
UNITED STATES | Other Postretirement Benefit Plans
Defined Benefit Plan, Funded Status [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	0			0	0
Non-US [Member]
Defined Benefit Plan, Funded Status [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(1,017)			(1,017)	(473)
Non-US [Member] | Other Postretirement Benefit Plans
Defined Benefit Plan, Funded Status [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	0			0	0
Pension Plan, Excluding Plans with Plan Assets
Defined Benefit Plan, Funded Status [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	(624)			(624)	(612)
Other Postretirement Benefit Plans, Excluding Plans with Plan Assets
Defined Benefit Plan, Funded Status [Abstract]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	$ (914)			$ (914)	$ (893)