The average market price for a group of price risk forward or futures contracts, such as gas futures contracts.

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Amount of gain (loss) from the increase (decrease) in fair value of derivative and nonderivative instruments designated as fair value hedging instruments recognized in the income statement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 815
-SubTopic 25
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480238/815-25-50-1

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Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement.

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- Definition

The average forward price on the group of price risk forward or futures contracts, such as gas futures contracts.

+ References

No definition available.

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4E
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-4E

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Nominal mass used to calculate payments on a derivative instrument.

+ References

No definition available.

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- Definition

Net Increase or Decrease in the fair value of the embedded derivative or group of embedded derivatives included in earnings in the period.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 15
-Name Accounting Standards Codification
-Publisher FASB
-URI https://asc.fasb.org/815-15/tableOfContent

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Financial Instruments - Unrealized gains losses (Details) oz in Thousands, lb in Millions, $ in Millions		3 Months Ended		9 Months Ended
	Jun. 30, 2023 lb oz	Sep. 30, 2025 USD ($) $ / lb $ / lb $ / oz	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) lb $ / lb $ / lb $ / oz	Sep. 30, 2024 USD ($)
Commodity Contract
Unrealized gains (losses):
Derivative financial instruments		$ (23)	$ 12	$ 44	$ 22
Hedged item – firm sales commitments		23	(12)	(44)	(22)
Realized gains (losses):
Matured derivative financial instruments		1	0	31	29
Matured derivative financial instruments		$ 1	0	$ 31	29
Commodity Contract \| Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass \| lb				117
Derivative, Average Forward Price \| $ / lb		4.75		4.75
Forward Contracts \| Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass \| lb				52
Derivative, Average Forward Price \| $ / lb		4.51		4.51
Realized gains (losses):
Matured derivative financial instruments		$ (7)	(19)	$ (47)	(45)
Matured derivative financial instruments		(7)	(19)	(47)	(45)
Copper \| Not Designated as Hedging Instrument
Realized gains (losses):
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net		$ 82	29	$ 232	276
Copper \| Short [Member] \| Embedded Derivative Financial Instruments \| Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass \| lb	402
Derivative, Average Forward Price \| $ / lb		4.43		4.43
Realized gains (losses):
Derivative Average Market Price \| $ / lb		4.65		4.65
Copper \| Long [Member] \| Embedded Derivative Financial Instruments \| Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass \| lb	111
Derivative, Average Forward Price \| $ / lb		4.43		4.43
Realized gains (losses):
Derivative Average Market Price \| $ / lb		4.65		4.65
Gold \| Short [Member] \| Embedded Derivative Financial Instruments \| Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass \| oz	53
Derivative, Average Forward Price \| $ / oz		3,429		3,429
Realized gains (losses):
Derivative Average Market Price \| $ / oz		3,833		3,833
gold and other \| Not Designated as Hedging Instrument
Realized gains (losses):
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net		$ 71	$ 81	$ 131	$ 170