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Summarized Financial Data - Tengizchevroil LLP - Schedule of Income Statement Information (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Affiliate Statements Captions [Line Items]      
Percentage of affiliate by summarized financial information 100.00%    
Sales and other operating revenues $ 184,432 $ 193,414 $ 196,913
Net income attributable to TCO $ 12,485 17,749 21,411
Tengizchevroil      
Affiliate Statements Captions [Line Items]      
Percentage of affiliate by summarized financial information 100.00%    
Sales and other operating revenues $ 21,986 18,872 19,578
Costs and other deductions 18,419 10,616 10,193
Net income attributable to TCO $ 2,496 $ 5,779 $ 6,569
Tengizchevroil      
Affiliate Statements Captions [Line Items]      
Equity method investment, ownership percentage 50.00%