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Summarized Financial Data - Tengizchevroil LLP (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Affiliate Statements Captions [Line Items]    
Sales and other operating revenues $ 47,556 $ 46,101
Net Income (Loss) $ 2,293 3,512
Tengizchevroil LLP    
Affiliate Statements Captions [Line Items]    
Percentage of affiliate by summarized financial information 100.00%  
Sales and other operating revenues $ 4,082 5,247
Costs and other deductions 2,967 4,032
Net Income (Loss) $ 804 $ 879
Tengizchevroil LLP    
Affiliate Statements Captions [Line Items]    
Equity ownership, percentage 50.00%