Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 1,985	$ 1,975
Accounts receivable, net	1,499	1,448
Materials and supplies	793	803
Other current assets	257	408
Total current assets	4,534	4,634
Property and equipment, net of accumulated depreciation of $10,004 and $8,627, respectively	63,185	62,313
Goodwill	14,851	14,845
Intangible assets, net	373	394
Other assets	2,150	2,337
Total assets	85,093	84,523
Current liabilities:
Accounts payable and other current liabilities	3,261	3,169
Long-term debt due within one year	830	740	[1]
Total current liabilities	4,091	3,909
Long-term debt	22,396	21,759	[1]
Deferred income taxes	13,795	13,452
Casualty and environmental liabilities	486	499
Intangible liabilities, net	381	471
Pension and retiree health and welfare liability	267	310
Other liabilities	1,028	1,114
Total liabilities	42,444	41,514
Commitments and contingencies (see Notes 12 and 13)
Equity:
Member's Equity	42,519	42,778
Accumulated other comprehensive income (loss)	130	231
Total equity	42,649	43,009
Total liabilities and equity	$ 85,093	$ 84,523

[1] Amounts represent debt outstanding and weighted average effective interest rates for 2018 and 2017, respectively. Maturities are as of December 31, 2018.