Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 563	$ 2,488
Receivables, less reserve of $12 and $6	1,082	748
Notes, Loans and Financing Receivable, Net, Current	748	0
Inventories	126	136
Other current assets	36	66
Disposal Group, Including Discontinued Operation, Assets, Current	11	227
Total current assets	2,566	3,665
Equity method investments	847	931
Property, plant and equipment, less accumulated depreciation, depletion and amortization of $21,564 and $20,255	17,665	16,727
Goodwill	115	115
Other noncurrent assets	764	558
Noncurrent assets held for sale	55	9,098
Total assets	22,012	31,094
Current liabilities:
Accounts payable	1,395	967
Payroll and benefits payable	108	129
Accrued taxes	177	94
Other current liabilities	288	243
Long-term debt due within one year	0	686
Disposal Group, Including Discontinued Operation, Liabilities, Current	0	121
Total current liabilities	1,968	2,240
Long-term debt	5,494	6,581
Deferred tax liabilities	833	769
Defined benefit postretirement plan obligations	362	345
Asset retirement obligations	1,428	1,602
Deferred credit and other liabilities	217	225
Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent	2	1,791
Total liabilities	10,304	13,553
Commitments and contingencies
Stockholders’ Equity
Preferred stock no shares issued or outstanding (no par value, 26 million shares authorized)	0	0
Common stock issued - 937 million and 937 million shares (par value $1 per share, 1.1 billion shares authorized)	937	937
Common stock, held in treasury, at cost – 87 million and 90 million shares	(3,325)	(3,431)
Additional paid-in capital	7,379	7,446
Retained earnings	6,779	12,672
Accumulated other comprehensive loss	(62)	(83)
Total stockholders equity	11,708	17,541
Total liabilities and stockholders equity	$ 22,012	$ 31,094