INCOME TAXES - Components of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Deferred income tax assets:
Reserves and other accrued liabilities	$ 354	$ 294
Pension, postretirement and other employee benefits	460	518
Lease liability	409	400
Tax credit and loss carryforwards	538	423
Interest limitation carryforward	114	63
Capitalized costs	180	155
Intangible assets	428	20
Investments	25	0
Other	10	10
Total deferred income tax assets	2,518	1,883
Valuation allowance	(655)	(498)
Deferred income tax assets, net	1,863	1,385
Deferred income tax liabilities:
Lease asset	(340)	(326)
Property, equipment and other assets	(89)	(140)
Investments	0	(99)
Financing obligations	(66)	(67)
Other	(16)	(14)
Total deferred income tax liabilities	(511)	(646)
Deferred income tax assets, net	$ 1,352	$ 739