Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 1,984	$ 1,985
Accounts receivable, net	1,401	1,499
Materials and supplies	789	793
Other current assets	113	257
Total current assets	4,287	4,534
Property and equipment, net of accumulated depreciation of $12,101 and $10,004, respectively	64,533	63,185
Goodwill	14,851	14,851
Operating lease right-of-use assets	2,285
Other assets	2,618	2,523
Total assets	88,574	85,093
Current liabilities:
Accounts payable and other current liabilities	3,634	3,261
Long-term debt and finance leases due within one year	571	830
Total current liabilities	4,205	4,091
Long-term debt and finance leases	22,640	22,396
Deferred income taxes	14,353	13,795
Operating lease liabilities	1,632
Casualty and environmental liabilities	442	486
Pension and retiree health and welfare liability	285	267
Other liabilities	1,297	1,409
Total liabilities	44,854	42,444
Commitments and contingencies (see Note 12)
Equity:
Member’s equity	43,575	42,519
Accumulated other comprehensive income (loss)	145	130
Total equity	43,720	42,649
Total liabilities and equity	$ 88,574	$ 85,093