Derivatives - Schedule of Derivative Instruments in Statement of Financial Position, Fair Value (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Derivatives, Fair Value [Line Items]
Derivative assets (liabilities), fair value, net	$ (1,973)	$ (1,391)
Derivative assets (liabilities), offsetting instruments	0	0
Derivative assets (liabilities): financial collateral (received) pledged	502	183
Derivative assets (liabilities), net amounts	(1,471)	(1,208)
Current assets
Derivatives, Fair Value [Line Items]
Derivative asset, fair value, net	2,950	2,587
Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative asset, fair value, net	593	740
Current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, fair value, net	(4,086)	(3,351)
Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative liability, fair value, net	(1,430)	(1,367)
Commodity Contracts
Derivatives, Fair Value [Line Items]
Derivative assets (liabilities), fair value, gross assets	3,489	3,226
Derivative assets (liabilities), fair value, gross liability	(5,456)	(4,686)
Derivative assets: offsetting Instruments	(2,901)	(2,532)
Derivative liability, offsetting instruments	2,901	2,532
Derivative assets, financial collateral (received) pledged	(15)	(50)
Derivative liabilities, financial collateral (received) pledged	517	233
Derivative assets, net amounts	573	644
Derivative liability, net amounts	(2,038)	(1,921)
Commodity Contracts | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets, far value, gross asset	(2,906)	(2,551)
Derivative liabilities, far value, gross asset	(19)	(2)
Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets, far value, gross asset	(587)	(677)
Derivative liabilities, far value, gross asset	(3)	(1)
Commodity Contracts | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative assets, far value, gross asset	0	0
Derivative liabilities, far value, gross asset	(4,070)	(3,333)
Commodity Contracts | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative assets, far value, gross asset	(4)	(2)
Derivative liabilities, far value, gross asset	(1,408)	(1,356)
Interest Rate Swaps
Derivatives, Fair Value [Line Items]
Derivative assets (liabilities), fair value, gross assets	28	96
Derivative assets (liabilities), fair value, gross liability	(34)	(27)
Derivative assets: offsetting Instruments	(18)	(28)
Derivative liability, offsetting instruments	18	28
Derivative assets, financial collateral (received) pledged	0	0
Derivative liabilities, financial collateral (received) pledged	0	0
Derivative assets, net amounts	10	68
Derivative liability, net amounts	(16)	1
Interest Rate Swaps | Current assets
Derivatives, Fair Value [Line Items]
Derivative assets, far value, gross asset	(25)	(34)
Derivative liabilities, far value, gross asset	0	0
Interest Rate Swaps | Noncurrent assets
Derivatives, Fair Value [Line Items]
Derivative assets, far value, gross asset	(3)	(62)
Derivative liabilities, far value, gross asset	0	0
Interest Rate Swaps | Current liabilities
Derivatives, Fair Value [Line Items]
Derivative assets, far value, gross asset	0	0
Derivative liabilities, far value, gross asset	(16)	(18)
Interest Rate Swaps | Noncurrent liabilities
Derivatives, Fair Value [Line Items]
Derivative assets, far value, gross asset	0	0
Derivative liabilities, far value, gross asset	$ (18)	$ (9)