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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details) € in Millions, ton in Millions, MWh in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 EUR (€) MWh ton	Jun. 30, 2025 USD ($) MWh ton	Dec. 31, 2024 EUR (€) MWh ton	Dec. 31, 2024 USD ($) MWh ton
Derivative [Line Items]
Assets						$ 58		$ 3
Liabilities						91		0
Other Current Assets
Derivative [Line Items]
Assets						33		$ 3
Other Noncurrent Assets
Derivative [Line Items]
Assets						25
Other Current Liabilities
Derivative [Line Items]
Liabilities						75
Other Noncurrent Liabilities
Derivative [Line Items]
Liabilities						$ 16
Cash Flow Hedging
Derivative [Line Items]
Gain (Loss) Reclassified from AOCI Into Income	$ (8)	$ 0	$ (7)	$ 0
Electricity contracts (MWh) \| Cash Flow Hedging \| Derivatives designated as hedging instruments
Derivative [Line Items]
Derivative, nonmonetary notional amount \| MWh					0.7	0.7	0.3	0.3
Natural gas contracts (MWh) \| Cash Flow Hedging \| Derivatives designated as hedging instruments
Derivative [Line Items]
Derivative, nonmonetary notional amount \| MWh					6.9	6.9	0.0	0.0
Carbon credit contracts (tons) \| Cash Flow Hedging \| Derivatives designated as hedging instruments
Derivative [Line Items]
Derivative, nonmonetary notional amount \| ton					0.8	0.8	0.0	0.0
External debt \| Net Investment Hedging
Derivative [Line Items]
Gain (Loss) Recognized in AOCI on Derivatives	(85)	0	(77)	0
External debt \| Net Investment Hedging \| Derivatives designated as hedging instruments
Derivative [Line Items]
Derivative, notional amount \| €					€ 3,313		€ 0
Commodity contracts \| Derivatives designated as hedging instruments
Derivative [Line Items]
Gain (Loss) Recognized in Income	20	(2)	14	(11)
Assets						$ 8		$ 0
Liabilities						49		0
Commodity contracts \| Derivatives not designated as hedging instruments
Derivative [Line Items]
Assets						50		3
Liabilities						$ 42		$ 0
Commodity contracts \| Cash Flow Hedging
Derivative [Line Items]
Gain (Loss) Recognized in AOCI on Derivatives	0	0	(52)	0
Gain (Loss) Reclassified from AOCI Into Income	(7)	0	(6)	0
Commodity contracts \| Cash Flow Hedging \| Derivatives designated as hedging instruments
Derivative [Line Items]
Gain (Loss) Recognized in Income	(28)	0	(23)	0
Interest rate contracts \| Cash Flow Hedging
Derivative [Line Items]
Gain (Loss) Reclassified from AOCI Into Income	$ (1)	$ 0	$ (1)	$ 0