Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 1,969	$ 1,984
Accounts receivable, net	1,226	1,401
Materials and supplies	723	789
Other current assets	131	113
Total current assets	4,049	4,287
Property and equipment, net of accumulated depreciation of $12,724 and $12,101, respectively	65,146	64,533
Goodwill	14,851	14,851
Operating lease right-of-use assets	2,013	2,285
Other assets	2,674	2,618
Total assets	88,733	88,574
Current liabilities:
Accounts payable and other current liabilities	3,184	3,634
Long-term debt and finance leases due within one year	918	571
Total current liabilities	4,102	4,205
Long-term debt and finance leases	22,327	22,640
Deferred income taxes	14,626	14,353
Operating lease liabilities	1,300	1,632
Casualty and environmental liabilities	436	442
Pension and retiree health and welfare liability	277	285
Other liabilities	1,375	1,297
Total liabilities	44,443	44,854
Commitments and contingencies (see Note 5)
Equity:
Member’s equity	44,143	43,575
Accumulated other comprehensive income (loss)	147	145
Total equity	44,290	43,720
Total liabilities and equity	$ 88,733	$ 88,574