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
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-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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-Publisher FASB
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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
	Jun. 30, 2023 lb oz	Mar. 31, 2026 USD ($) lb $ / lb $ / oz $ / lb	Mar. 31, 2025 USD ($)
Commodity Contract
Unrealized gains (losses):
Derivative financial instruments		$ (49)	$ 81
Hedged item – firm sales commitments		49	(81)
Realized gains (losses):
Matured derivative financial instruments		35	20
Matured derivative financial instruments		$ 35	20
Commodity Contract \| Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass \| lb		126
Derivative, Average Forward Price \| $ / lb		5.51
Forward Contracts \| Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass \| lb		93
Derivative, Average Forward Price \| $ / lb		5.69
Realized gains (losses):
Matured derivative financial instruments		$ 11	(38)
Matured derivative financial instruments		11	(38)
Copper \| Not Designated as Hedging Instrument
Realized gains (losses):
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net		$ (21)	116
Copper \| Short [Member] \| Embedded Derivative Financial Instruments \| Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass \| lb	239
Derivative, Average Forward Price \| $ / lb		5.60
Realized gains (losses):
Derivative Average Market Price \| $ / lb		5.57
Copper \| Long [Member] \| Embedded Derivative Financial Instruments \| Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass \| lb	100
Derivative, Average Forward Price \| $ / lb		5.63
Realized gains (losses):
Derivative Average Market Price \| $ / lb		5.59
Gold \| Short [Member] \| Embedded Derivative Financial Instruments \| Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Nonmonetary Notional Amount, Mass \| oz	2
Derivative, Average Forward Price \| $ / oz		4,834
Realized gains (losses):
Derivative Average Market Price \| $ / oz		4,607
gold and other \| Not Designated as Hedging Instrument
Realized gains (losses):
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net		$ 1	$ 38