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Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Statement of Financial Position [Abstract]    
Accumulated depreciation $ 13,462 $ 13,265
Common stock, par or stated value per share (in dollars per share) $ 1.00 $ 1.00
Common stock, shares authorized (in shares) 1,350,000,000 1,350,000,000
Common stock, shares outstanding, net of treasury shares (in shares) 225,914,028 225,681,254