Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 1,994	$ 1,985
Accounts receivable, net	1,538	1,499
Materials and supplies	784	793
Other current assets	166	257
Total current assets	4,482	4,534
Property and equipment, net of accumulated depreciation of $11,206 and $10,004, respectively	63,576	63,185
Goodwill	14,851	14,851
Operating lease right-of-use assets	2,532	0
Intangible assets, net of accumulated amortization of $297 and $279, respectively	355	373
Other assets	2,314	2,150
Total assets	88,110	85,093
Current liabilities:
Accounts payable and other current liabilities	4,108	3,261
Long-term debt due within one year	1,075	830
Total current liabilities	5,183	4,091
Long-term debt	22,117	22,396
Deferred income taxes	14,056	13,795
Operating lease liabilities	1,724	0
Casualty and environmental liabilities	472	486
Intangible liabilities, net of accumulated amortization of $1,036 and $1,022, respectively	367	381
Pension and retiree health and welfare liability	274	267
Other liabilities	1,015	1,028
Total liabilities	45,208	42,444
Commitments and contingencies (see Notes 5 and 6)
Equity:
Member's equity	42,710	42,519
Accumulated other comprehensive income (loss)	192	130
Total equity	42,902	42,649
Total liabilities and equity	$ 88,110	$ 85,093