STOCKHOLDERS' EQUITY (Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	$ (7,139)	$ (8,977)
Total other comprehensive income (loss)	(542)	1,838	$ 1,878
Ending Balance	(7,681)	(7,139)	(8,977)
Unrealized Gains (Losses) on Investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(253)	59	104
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(6)	(326)	(21)
Other Comprehensive Income (Loss) before Reclassifications, Tax	54	13	5
Other comprehensive income (loss) before reclassifications	48	(313)	(16)
Total other comprehensive income (loss)	0	(312)	(45)
Ending Balance	(253)	(253)	59
Cumulative Translation Adj
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(1,934)	(1,355)	(930)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	57	(557)	(375)
Other Comprehensive Income (Loss) before Reclassifications, Tax	0	24	(40)
Other comprehensive income (loss) before reclassifications	57	(533)	(415)
Total other comprehensive income (loss)	43	(579)	(425)
Ending Balance	(1,891)	(1,934)	(1,355)
Pension and Other Postretire Benefits
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(4,877)	(7,334)	(9,559)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(1,454)	2,611	2,094
Other Comprehensive Income (Loss) before Reclassifications, Tax	349	(630)	(464)
Other comprehensive income (loss) before reclassifications	(1,105)	1,981	1,630
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	648	622	776
Reclassification from AOCI, Current Period, Tax	(152)	(146)	(181)
Amounts reclassified from accumulated other comprehensive income (loss)	496	476	595
Total other comprehensive income (loss)	(609)	2,457	2,225
Ending Balance	(5,486)	(4,877)	(7,334)
Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	(75)	(347)	(470)
Other Comprehensive Income (Loss), before Reclassifications, before Tax	(201)	638	155
Other Comprehensive Income (Loss) before Reclassifications, Tax	30	(87)	3
Other comprehensive income (loss) before reclassifications	(171)	551	158
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	250	(313)	(38)
Reclassification from AOCI, Current Period, Tax	(55)	34	3
Amounts reclassified from accumulated other comprehensive income (loss)	195	(279)	(35)
Total other comprehensive income (loss)	24	272	123
Ending Balance	(51)	(75)	(347)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gains (Losses) on Investments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax	(63)	2	(38)
Reclassification from AOCI, Current Period, Tax	15	(1)	9
Amounts reclassified from accumulated other comprehensive income (loss)	(48)	1	(29)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Cumulative Translation Adj
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive income (loss)	$ (14)	$ (46)	$ (10)