Derivatives and Risk Management Activities - Fair Value (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Recurring Fair Value Measurements
Total net derivative asset/(liability)	$ (43)	$ 4
Level 1
Recurring Fair Value Measurements
Total net derivative asset/(liability)	(50)	(2)
Level 2
Recurring Fair Value Measurements
Total net derivative asset/(liability)	7	6
Commodity derivatives
Recurring Fair Value Measurements
Total net derivative asset/(liability)	(43)	(4)
Commodity derivatives \| Level 1
Recurring Fair Value Measurements
Total net derivative asset/(liability)	(50)	(2)
Commodity derivatives \| Level 2
Recurring Fair Value Measurements
Total net derivative asset/(liability)	7	(2)
Foreign currency derivatives
Recurring Fair Value Measurements
Total net derivative asset/(liability)	20	8
Foreign currency derivatives \| Level 1
Recurring Fair Value Measurements
Total net derivative asset/(liability)	$ 0	0
Foreign currency derivatives \| Level 2
Recurring Fair Value Measurements
Total net derivative asset/(liability)		$ 8

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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