ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Summary of Changes in AOCI by Component (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning of year	$ 7,024	$ 8,468	$ 5,895
End of year	6,102	7,024	8,468
Total
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning of year	(4,010)	(3,554)	(3,833)
Other comprehensive income (loss) before reclassifications	150	(454)	115
Amounts reclassified from AOCI	106	(2)	164
Total other comprehensive income (loss) from continuing operations, net of tax	256	(456)	279
End of year	(3,754)	(4,010)	(3,554)
CTA
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning of year	(3,430)	(2,985)	(3,386)
Other comprehensive income (loss) before reclassifications	171	(445)	216
Amounts reclassified from AOCI	126	0	185
Total other comprehensive income (loss) from continuing operations, net of tax	297	(445)	401
End of year	(3,133)	(3,430)	(2,985)
Pension and OPEB plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning of year	(475)	(452)	(331)
Other comprehensive income (loss) before reclassifications	(19)	(19)	(106)
Amounts reclassified from AOCI	(20)	(4)	(15)
Total other comprehensive income (loss) from continuing operations, net of tax	(39)	(23)	(121)
End of year	(514)	(475)	(452)
Hedging activities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning of year	(108)	(120)	(119)
Other comprehensive income (loss) before reclassifications	(2)	10	5
Amounts reclassified from AOCI	0	2	(6)
Total other comprehensive income (loss) from continuing operations, net of tax	(2)	12	(1)
End of year	(110)	(108)	(120)
Available-for-sale debt securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning of year	3	3	3
Other comprehensive income (loss) before reclassifications	0	0	0
Amounts reclassified from AOCI	0	0	0
Total other comprehensive income (loss) from continuing operations, net of tax	0	0	0
End of year	$ 3	$ 3	$ 3