FAIR VALUE ACCOUNTING - Schedule of Changes in the Fair Value of Level 3 Financial Assets and Liabilities (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Mar. 31, 2026	Sep. 30, 2026	Sep. 30, 2025
Discontinued operations disposed of by sale \| Musselwhite
Summary of changes in Level 3 financial liabilities
Deferred payment received	$ 20
Derivative Liabilities
Summary of changes in Level 3 financial liabilities
Fair value, beginning of period	0	$ 0	$ 6
Acquired through divestments			0
Fair value changes in Other comprehensive income (loss)		3	(1)
Settlements		0
Fair value changes in Other income (loss), net			0
Fair value, end of period		3	5
Derivative Assets
Summary of changes in Level 3 financial assets
Fair value, beginning of period	$ 202	202	142
Fair value changes in Other comprehensive income (loss)		(29)	56
Settlements		(20)
Acquired through divestments			168
Fair value changes in Other income (loss), net			(2)
Fair value, end of period		$ 153	$ 364

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

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Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3).

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Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of settlement of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of gain (loss) recognized in income from liability measured at fair value on recurring basis using unobservable input (level 3).

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Amount of gain (loss) recognized in other comprehensive income (OCI) from liability measured at fair value on recurring basis using unobservable input (level 3).

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Amount of purchases, (sales), issuances and (settlements) of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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