Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 1,303	$ 1,641
Accounts receivable – net	1,123	1,069
Materials and supplies	313	277
Other current assets	168	201
Total current assets	2,907	3,188
Investments	4,038	3,370
Properties less accumulated depreciation	35,921	35,831
Other assets	1,289	1,293
Total assets	44,155	43,682
Current liabilities:
Accounts payable	1,504	1,704
Income and other taxes	223	337
Other current liabilities	1,037	949
Current maturities of long-term debt	903	555
Total current liabilities	3,667	3,545
Long-term debt	16,464	16,651
Other liabilities	1,708	1,760
Deferred income taxes	7,529	7,420
Total liabilities	29,368	29,376
Stockholders’ equity:
Common stock, net of treasury shares	226	228
Additional paid-in capital	2,259	2,247
Accumulated other comprehensive loss	(261)	(262)
Retained income	12,563	12,093
Total stockholders’ equity	14,787	14,306
Total liabilities and stockholders’ equity	$ 44,155	$ 43,682