ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
AOCI Attributable to Parent, Net of Tax
Beginning balance, tax effect	$ 782	$ 1,184	$ 1,764
Beginning balance	6,582	3,887	1,534
Changes in value, tax effect	71	(330)	(484)
Changes in value (net of tax effect)	(233)	1,089	1,593
Reclassifications into earnings, tax effect	(57)	(72)	(96)
Reclassification into earnings (net of tax effect)	189	240	315
Ending balance, tax effect	796	782	1,184
Ending balance	11,105	6,582	3,887
Deferred income tax expense in AOCI that will not be recognized until obligation is fully extinguished	755	755	755
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax
Beginning balance	(5,801)	(7,130)	(9,038)
Ending balance	(5,845)	(5,801)	(7,130)
Pension and Other Benefits Liabilities
AOCI Attributable to Parent, Net of Tax
Beginning balance, AOCI before tax	(6,624)	(8,355)	(10,843)
Changes in value	(303)	1,419	2,077
Reclassifications into earnings	246	312	411
Ending balance, AOCI before tax	(6,681)	(6,624)	(8,355)
Other
AOCI Attributable to Parent, Net of Tax
Beginning balance, AOCI before tax	41	41	41
Changes in value	(1)	0	0
Reclassifications into earnings	0	0	0
Ending balance, AOCI before tax	$ 40	$ 41	$ 41