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Risk Management - CF Hedging Effect on the Income Statements (Details) - Designated as Hedging Instrument - Cash flow hedge - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized in OCI on derivative	$ (15)	$ 63	$ (105)	$ 201
Gain/(Loss) reclassified from Accumulated OCI into income	(33)	2	(29)	66
Loss to be reclassified within twelve months			(78)
Energy commodity derivative contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized in OCI on derivative	(12)	50	(105)	185
Energy commodity derivative contracts \| Revenues—Commodity sales
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) reclassified from Accumulated OCI into income	(27)	18	(7)	83
Energy commodity derivative contracts \| Costs of sales
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) reclassified from Accumulated OCI into income	(2)	(20)	(9)	(27)
Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized in OCI on derivative			13	0
Interest rate contracts \| Interest, net
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) reclassified from Accumulated OCI into income			4	0
Foreign currency contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(loss) recognized in OCI on derivative	(3)	13	(13)	16
Foreign currency contracts \| Other, net
Derivative Instruments, Gain (Loss) [Line Items]
Gain/(Loss) reclassified from Accumulated OCI into income	$ (4)	$ 4	$ (17)	$ 10