ACCUMULATED OTHER COMPREHENSIVE LOSS (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	$ 1	$ 6	$ 4	$ 15
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	6	(6)	8	8
AOCI Tax, Attributable to Parent	93	116	93	116	$ 96	$ 97	$ 117	$ 122
Accumulated Other Comprehensive Income (Loss), Net of Tax	(287)	(365)	(287)	(365)	(294)	(299)	(365)	(388)
Reclassification from AOCI, Current Period, Tax	(3)	(2)	(4)	(4)
Income tax effect	0	1	0	(2)
Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI before Tax, Attributable to Parent	(39)	(84)	(39)	(84)	(45)	(46)	(78)	(104)
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	6	(9)	7	11
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	0	3	0	9
AOCI Employee Benefit Plan
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI before Tax, Attributable to Parent	(350)	(411)	(350)	(411)	(354)	(358)	(416)	(421)
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	0	0	0	0
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	4	5	8	10
AOCI - Interest Rate Derivatives
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCI before Tax, Attributable to Parent	9	14	9	14	$ 9	$ 8	$ 12	$ 15
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	0	2	1	(1)
Reclassification from AOCI, Current Period, before Tax, Attributable to Parent	$ 0	$ 0	$ 0	$ 0