Consolidated Balance Sheets - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 1,929	$ 1,758
Accounts receivable, net	1,399	1,316
Materials and supplies	980	864
Other current assets	139	114
Total current assets	4,447	4,052
Property and equipment, net of accumulated depreciation of $16,535 and $14,978, respectively	65,732	65,714
Goodwill	14,852	14,852
Operating lease right-of-use assets	1,531	1,592
Other assets	5,232	5,227
Total assets	91,794	91,437
Current liabilities:
Accounts payable and other current liabilities	4,357	3,896
Long-term debt and finance leases due within one year	1,437	932
Total current liabilities	5,794	4,828
Long-term debt and finance leases	21,581	22,287
Deferred income taxes	15,034	15,156
Operating lease liabilities	902	1,015
Casualty and environmental liabilities	421	427
Pension and retiree health and welfare liability	287	291
Other liabilities	950	984
Total liabilities	44,969	44,988
Commitments and contingencies (see Note 5)
Equity:
Member’s equity	46,467	46,096
Accumulated other comprehensive income (loss)	358	353
Total equity	46,825	46,449
Total liabilities and equity	$ 91,794	$ 91,437