Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 2,875	$ 2,329
Accounts receivable, net	1,273	1,198
Materials and supplies	795	829
Current portion of deferred income taxes	0	245
Other current assets	472	337
Total current assets	5,415	4,938
Property and equipment, net of accumulated depreciation of $5,673 and $4,845, respectively	60,897	59,510
Goodwill	14,845	14,845
Intangible assets, net	439	468
Other assets	1,986	1,942
Total assets	83,582	81,703
Current liabilities:
Accounts payable and other current liabilities	3,272	3,244
Long-term debt due within one year	820	389
Total current liabilities	4,092	3,633
Long-term debt	21,346	21,348
Deferred income taxes	19,733	19,072
Intangible liabilities, net	592	667
Casualty and environmental liabilities	582	609
Pension and retiree health and welfare liability	347	353
Other liabilities	1,034	989
Total liabilities	47,726	46,671
Commitments and contingencies (see Notes 6 and 7)
Equity:
Member's equity	35,810	34,984
Accumulated other comprehensive income	46	48
Total equity	35,856	35,032
Total liabilities and equity	$ 83,582	$ 81,703