Financial Instruments and Derivatives (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Total Gross Assets & Liabilities [Domain]
Fair value balance sheet grouping financial statement captions [Line Items]
Derivative assets	$ 6,127	$ 4,429
Advances to/receivables from equity companies	7,123	6,633
Other long-term financial assets	3,006	2,972
Derivative liabilities	6,297	4,977
Long-term debt	27,205	30,697
Long-term obligations to equity companies	1,427	1,393
Other long-term financial liabilities	$ 557	$ 583
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]	Other assets, including intangibles – net, Notes and accounts receivable – net	Other assets, including intangibles – net, Notes and accounts receivable – net
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accounts payable and accrued liabilities, Long-term obligations	Accounts payable and accrued liabilities, Long-term obligations
Effect of Counterparty Netting
Fair value balance sheet grouping financial statement captions [Line Items]
Derivative assets	$ (5,516)	$ (3,913)
Derivative liabilities	(5,516)	(3,913)
Effect of Collateral Netting
Fair value balance sheet grouping financial statement captions [Line Items]
Derivative assets	(70)	(3)
Derivative liabilities	(268)	(341)
Difference in Carrying Value and Fair Value
Fair value balance sheet grouping financial statement captions [Line Items]
Advances to/receivables from equity companies	374	451
Other long-term financial assets	234	247
Long-term debt	3,560	3,935
Long-term obligations to equity companies	(46)	(47)
Other long-term financial liabilities	55	57
Net Carrying Value
Fair value balance sheet grouping financial statement captions [Line Items]
Derivative assets	541	513
Advances to/receivables from equity companies	7,497	7,084
Other long-term financial assets	3,240	3,219
Derivative liabilities	513	723
Long-term debt	30,765	34,632
Long-term obligations to equity companies	1,381	1,346
Other long-term financial liabilities	612	640
Level 1
Fair value balance sheet grouping financial statement captions [Line Items]
Derivative assets	5,240	3,223
Other long-term financial assets	1,497	1,468
Derivative liabilities	5,438	3,561
Long-term debt	25,109	28,884
Level 2
Fair value balance sheet grouping financial statement captions [Line Items]
Derivative assets	887	1,206
Advances to/receivables from equity companies	2,435	2,466
Derivative liabilities	859	1,416
Long-term debt	2,096	1,813
Level 3
Fair value balance sheet grouping financial statement captions [Line Items]
Advances to/receivables from equity companies	4,688	4,167
Other long-term financial assets	1,509	1,504
Long-term obligations to equity companies	1,427	1,393
Other long-term financial liabilities	$ 557	$ 583