Condensed Consolidated Statements of Financial Position (Unaudited) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 925	$ 1,055
Short-term investments (Note 12)	20	16
Accounts receivable, net (Note 9)	2,162	2,073
Materials and supplies	770	743
Other current assets	317	261
Total current assets	4,194	4,148
Investments	2,651	2,605
Properties, net (Note 10)	57,590	57,398
Operating lease assets	1,453	1,643
Other assets	1,378	1,338
Total assets	67,266	67,132
Current liabilities:
Accounts payable and other current liabilities (Note 11)	3,801	3,683
Debt due within one year (Note 13)	733	1,423
Total current liabilities	4,534	5,106
Debt due after one year (Note 13)	31,195	31,156
Operating lease liabilities	1,016	1,245
Deferred income taxes	13,146	13,123
Other long-term liabilities	1,710	1,714
Total liabilities	51,601	52,344
Common shareholders' equity:
Common shares, $2.50 par value, 1,400,000,000 authorized; 1,113,042,000 and 1,112,854,806 issued; 610,088,307 and 609,703,814 outstanding, respectively	2,783	2,782
Paid-in-surplus	5,213	5,193
Retained earnings	62,940	62,093
Treasury stock	(54,661)	(54,666)
Accumulated other comprehensive loss (Note 8)	(610)	(614)
Total common shareholders' equity	15,665	14,788
Total liabilities and common shareholders' equity	$ 67,266	$ 67,132