SUPPLEMENTAL ACCOUNT BALANCES - Schedule of Other Noncurrent Assets (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025
SUPPLEMENTAL INFORMATION [Abstract]
Operating lease right-of-use assets	$ 77	$ 83
Deferred financing costs - Revolving Credit Facility	19	20
Emission reduction credits	11	11
Fair value of commodity derivative contracts	6	101
Funded pension	100	97
Postretirement plan	19	19
Other	42	42
Other noncurrent assets	$ 274	$ 373

Defined Benefit Plan, Funded Pension, Noncurrent

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Emission Reduction Credits, Noncurrent

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Supplemental Information

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- Definition

Amount, after accumulated amortization, of debt issuance costs classified as noncurrent. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Amount of asset, recognized in statement of financial position, for overfunded defined benefit pension and other postretirement plans.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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- Definition

Amount of lessee's right to use underlying asset under operating lease.

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Amount of other miscellaneous assets expected to be realized or consumed after one year or normal operating cycle, if longer.

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Amount of noncurrent assets classified as other.

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