CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) $ in Millions	Sep. 30, 2024 USD ($) $ / shares shares	Dec. 31, 2023 USD ($) shares
CONDENSED CONSOLIDATED BALANCE SHEETS
Allowance for doubtful accounts | $	$ 2	$ 2
Materials and supplies, allowance for obsolescence | $	$ 176	$ 198
Shares, Par value | (per share)	$ 0.10
Shares, authorized	1,057,879,029	1,021,294,549
Shares, conditionally authorized	141,262,093	142,362,093
Shares, issued	940,828,901	843,715,858
Shares, outstanding	875,803,595	809,030,846