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Consolidated Balance Sheet (Parenthetical) - USD ($)
$ in Millions
Sep. 30, 2023
Dec. 31, 2022
Statement of Financial Position [Abstract]    
Allowance for accounts and notes receivable $ 3 $ 2
Accumulated depreciation, depletion and amortization $ 71,630 $ 66,630
Common stock, shares authorized (in shares) 2,500,000,000 2,500,000,000
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares issued (in shares) 2,103,596,767 2,100,885,134
Treasury stock, shares (in shares) 916,188,825 877,029,062