Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Operating revenues:
Total operating revenues	$ 24,510	$ 24,250	$ 24,119
Operating expenses:
Compensation and benefits	4,897	4,899	4,818
Purchased services and materials	2,626	2,520	2,616
Depreciation	2,465	2,398	2,318
Fuel	2,390	2,474	2,891
Equipment and other rents	912	920	947
Other	1,374	1,326	1,447
Total operating expenses	14,664	14,537	15,037
Operating income	9,846	9,713	9,082
Other income, net (Note 6)	629	350	491
Interest expense	(1,309)	(1,269)	(1,340)
Income before income taxes	9,166	8,794	8,233
Income tax expense (Note 7)	(2,028)	(2,047)	(1,854)
Net income	$ 7,138	$ 6,747	$ 6,379
Share and Per Share (Note 8):
Earnings per share - basic (in dollars per share)	$ 12.00	$ 11.10	$ 10.47
Earnings per share - diluted (in dollars per share)	$ 11.98	$ 11.09	$ 10.45
Weighted average number of shares - basic (in shares)	595.0	607.6	609.2
Weighted average number of shares - diluted (in shares)	595.9	608.6	610.2
Freight revenues
Operating revenues:
Total operating revenues	$ 23,220	$ 22,811	$ 22,571
Other revenues
Operating revenues:
Total operating revenues	$ 1,290	$ 1,439	$ 1,548

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Operating activities
Net income	$ 7,138	$ 6,747	$ 6,379
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation	2,465	2,398	2,318
Deferred and other income taxes	241	28	117
Other operating activities, net	(193)	(13)	(132)
Changes in current assets and liabilities:
Accounts receivable, net	34	179	(177)
Materials and supplies	(18)	(26)	(2)
Other current assets	25	(69)	(38)
Accounts payable and other current liabilities	(196)	189	(215)
Income and other taxes	(206)	(87)	129
Cash provided by operating activities	9,290	9,346	8,379
Investing activities
Capital investments	(3,791)	(3,452)	(3,606)
Other investing activities, net	29	127	(61)
Cash used in investing activities	(3,762)	(3,325)	(3,667)
Financing activities
Dividends paid	(3,236)	(3,213)	(3,173)
Share repurchase programs (Note 18)	(2,679)	(1,505)	(705)
Debt issued (Note 14)	1,995	800	1,599
Debt repaid	(1,428)	(2,226)	(2,190)
Other financing activities, net	72	77	(156)
Cash used in financing activities	(5,276)	(6,067)	(4,625)
Net change in cash, cash equivalents, and restricted cash	252	(46)	87
Cash, cash equivalents, and restricted cash at beginning of year	1,028	1,074	987
Cash, cash equivalents, and restricted cash at end of year	1,280	1,028	1,074
Non-cash investing and financing activities:
Capital investments accrued but not yet paid	131	165	137
Cash paid during the year for:
Federal income taxes, net of refunds	(543)	(986)	(1,185)
Total state income taxes, net of refunds	(321)	(350)	(295)
Foreign income taxes, net of refunds	(13)	(4)	(6)
Interest, net of amounts capitalized	(1,311)	(1,260)	(1,268)
California
Cash paid during the year for:
Total state income taxes, net of refunds	(64)
Other
Cash paid during the year for:
Total state income taxes, net of refunds	$ (257)	$ (350)	$ (295)

Consolidated Statements of Financial Position - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 1,266	$ 1,016
Short-term investments (Note 13)	250	20
Accounts receivable, net (Note 10)	1,860	1,894
Materials and supplies	787	769
Other current assets	392	322
Total current assets	4,555	4,021
Investments	2,885	2,664
Properties, net (Note 11)	59,645	58,343
Operating lease assets (Note 16)	1,036	1,297
Other assets	1,577	1,390
Total assets	69,698	67,715
Current liabilities:
Accounts payable and other current liabilities (Note 12)	3,494	3,829
Debt due within one year (Note 14)	1,520	1,425
Total current liabilities	5,014	5,254
Debt due after one year (Note 14)	30,294	29,767
Operating lease liabilities (Note 16)	738	925
Deferred income taxes (Note 7)	13,421	13,151
Other long-term liabilities	1,764	1,728
Commitments and contingencies (Note 17)
Total liabilities	51,231	50,825
Common shareholders' equity:
Common shares, $2.50 par value, 1,400,000,000 authorized; 1,113,161,191 and 1,113,018,733 issued; 593,245,884 and 604,241,260 outstanding, respectively	2,783	2,783
Paid-in-surplus	5,589	5,334
Retained earnings	69,529	65,628
Treasury stock	(58,843)	(56,132)
Accumulated other comprehensive income/(loss) (Note 9)	(591)	(723)
Total common shareholders' equity	18,467	16,890
Total liabilities and common shareholders' equity	$ 69,698	$ 67,715