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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Millions
Sep. 30, 2025
Dec. 31, 2024
CONDENSED CONSOLIDATED BALANCE SHEETS    
Allowance for doubtful accounts $ 2 $ 2
Materials and supplies, allowance for obsolescence $ 138 $ 178
Shares, Par value $ 0.1 $ 0.1
Shares, authorized 1,204,009,681 1,057,879,029
Shares, conditionally authorized 141,262,093 141,262,093
Shares, issued 1,204,009,681 940,828,901
Shares, outstanding 1,100,992,035 875,830,772