DERIVATIVE INSTRUMENTS AND HEDGING (Details) $ in Millions	6 Months Ended
DERIVATIVE INSTRUMENTS AND HEDGING (Details) $ in Millions	Jun. 30, 2026 USD ($) MWh MMBtu Tons	Dec. 31, 2025 MWh Tons MMBtu
Commodity Contract
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Reclassification of net losses	$ (23)
Commodity Contract \| Natural Gas
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount \| MMBtu	134,455,000	139,300,000
Commodity Contract \| Electricity
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount \| MWh	2,099,497	1,974,380
Commodity Contract \| HRC
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional Amount \| Tons	583,450	220,220
Cash-Settled Sales Swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Reclassification of net losses	$ (71)

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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