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DERIVATIVE FINANCIAL INSTRUMENTS - Cash Flow (Details) MMBTU in Millions, $ in Millions	1 Months Ended			3 Months Ended		6 Months Ended
	May 31, 2024 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2022 USD ($)	Jun. 30, 2025 USD ($) MMBTU	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($) MMBTU	Jun. 30, 2024 USD ($)	Dec. 31, 2020 USD ($)
Derivative [Line Items]
Recognized gain						$ 1
Unrecognized gain included in AOCI						$ 28
5.700% senior notes, net of discount and financing fees, due 2034
Derivative [Line Items]
Long-term debt, percentage rate	5.70%			5.70%		5.70%
Energy Related Derivative | Cash Flow Hedging
Derivative [Line Items]
Derivative, nonmonetary notional amount | MMBTU				6		6
Loss reclassified from AOCI						$ 1
Amount of gain recognized in earnings				$ 7	$ (6)	5	$ (12)
Unrealized Gain (Loss) on Derivatives						$ (1)
Treasury interest rate lock
Derivative [Line Items]
Derivative, notional amount								$ 175
Term of derivatives (in years)						10 years
Derivative, fixed interest rate								0.994%
Amount of gain recognized in earnings			$ 6
Cash received upon settlement		$ 37
Amortized portion part of interest expense for future issuance of debt	$ 31	$ 31
Euro Member Countries, Euro | Foreign exchange forward contracts
Derivative [Line Items]
Derivative, notional amount				119		$ 119
U.S. | Foreign exchange forward contracts
Derivative [Line Items]
Derivative, notional amount				$ 147		$ 147

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