SUPPLEMENTAL ACCOUNT BALANCES - Schedule of Other Noncurrent Assets (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
SUPPLEMENTAL INFORMATION [Abstract]
Operating lease right-of-use assets	$ 95	$ 105
Deferred financing costs - Revolving Credit Facility	21	23
Emission reduction credits	11	11
Fair value of commodity derivative contracts	26	16
Funded pension	73	67
Postretirement plan	14	13
Other	40	37
Other noncurrent assets	$ 280	$ 272

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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- Definition

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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