v3.26.1
CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
shares in Millions, $ in Millions
Mar. 31, 2026
Dec. 31, 2025
CONDENSED CONSOLIDATED BALANCE SHEETS    
Allowance for doubtful accounts $ 2 $ 2
Materials and supplies, allowance for obsolescence $ 144 $ 140
Shares, Par value $ 0.1 $ 0.1
Shares, authorized 1,204 1,204
Shares, conditionally authorized 141 141
Shares, issued 1,204 1,204
Shares, outstanding 1,107 1,102