Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 1,938	$ 1,758
Accounts receivable, net	1,404	1,316
Materials and supplies	952	864
Other current assets	137	114
Total current assets	4,431	4,052
Property and equipment, net of accumulated depreciation of $17,899 and $14,978, respectively	67,225	65,714
Goodwill	14,852	14,852
Operating lease right-of-use assets	1,233	1,592
Other assets	4,870	5,227
Total assets	92,611	91,437
Current liabilities:
Accounts payable and other current liabilities	4,447	3,896
Long-term debt and finance leases due within one year	1,562	932
Total current liabilities	6,009	4,828
Long-term debt and finance leases	21,890	22,287
Deferred income taxes	15,110	15,156
Operating lease liabilities	680	1,015
Casualty and environmental liabilities	385	427
Pension and retiree health and welfare liability	205	291
Other liabilities	1,096	984
Total liabilities	45,375	44,988
Commitments and contingencies (see Note 13)
Equity:
Member’s equity	47,042	46,096
Accumulated other comprehensive income (loss)	194	353
Total equity	47,236	46,449
Total liabilities and equity	92,611	91,437
Accumulated depreciation; property and equipment	$ 17,899	$ 14,978