Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 2,614	$ 2,488
Receivables, less reserve of $5 and $6	767	748
Notes receivable	742	0
Inventories	140	136
Other current assets	160	66
Current assets held for sale	1	227
Total current assets	4,424	3,665
Equity method investments	821	931
Property, plant and equipment, less accumulated depreciation, depletion and amortization of $21,238 and $20,255	18,337	16,727
Goodwill	115	115
Other noncurrent assets	543	558
Noncurrent assets held for sale	1	9,098
Total assets	24,241	31,094
Current liabilities:
Accounts payable	1,158	967
Payroll and benefits payable	92	129
Accrued taxes	78	94
Other current liabilities	206	243
Debt, Current	548	686
Current liabilities held for sale	0	121
Total current liabilities	2,082	2,240
Long-term debt	6,715	6,581
Deferred tax liabilities	839	769
Defined benefit postretirement plan obligations	340	345
Asset retirement obligations	1,642	1,602
Deferred credit and other liabilities	211	225
Noncurrent liabilities held for sale	7	1,791
Total liabilities	11,836	13,553
Commitments and contingencies
Stockholders' Equity
Preferred stock - no shares issued or outstanding (no par value, 26 million shares authorized)	0	0
Issued – 937 million shares and 937 million shares (par value $1 per share, 1.1 billion shares authorized)	937	937
Common stock, securities exchangeable into common stock - no shares issued or outstanding (no par value, 29 million shares authorized)	0	0
Held in treasury, at cost – 87 million and 90 million shares	(3,318)	(3,431)
Additional paid-in capital	7,349	7,446
Retained earnings	7,491	12,672
Accumulated other comprehensive loss	(54)	(83)
Total stockholders' equity	12,405	17,541
Total liabilities and stockholders' equity	$ 24,241	$ 31,094