CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Current Assets:
Cash and Cash Equivalents	$ 1,291	$ 1,958
Short-term Investments	178	129
Accounts Receivable - Net (Note 8)	1,377	1,313
Materials and Supplies	394	341
Other Current Assets	115	108
Total Current Assets	3,355	3,849
Properties	48,441	48,105
Accumulated Depreciation	(14,148)	(13,863)
Properties - Net	34,293	34,242
Investment in Affiliates and Other Companies	2,313	2,292
Right-of-Use Lease Asset	489	505
Goodwill and Other Intangible Assets - Net	500	502
Other Long-term Assets	528	522
Total Assets	41,478	41,912
Current Liabilities:
Accounts Payable	1,203	1,130
Labor and Fringe Benefits Payable	367	707
Casualty, Environmental and Other Reserves (Note 4)	151	144
Current Maturities of Long-term Debt (Note 7)	11	151
Income and Other Taxes Payable	361	111
Other Current Liabilities	228	228
Total Current Liabilities	2,321	2,471
Casualty, Environmental and Other Reserves (Note 4)	287	292
Long-term Debt (Note 7)	17,911	17,896
Deferred Income Taxes - Net	7,605	7,569
Long-term Lease Liability	478	488
Other Long-term Liabilities	542	571
Total Liabilities	29,144	29,287
Shareholders' Equity:
Common Stock, $1 Par Value	2,033	2,066
Other Capital	587	574
Retained Earnings	10,092	10,363
Accumulated Other Comprehensive Loss (Note 10)	(386)	(388)
Non-controlling Minority Interest	8	10
Total Shareholders' Equity	12,334	12,625
Total Liabilities and Shareholders' Equity	$ 41,478	$ 41,912