Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 961
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations	1,296	$ 1,462
Receivables, less reserve of $12 and $11	1,144	1,079
Inventories	72	96
Other current assets	101	257
Current assets held for sale	410	27
Total current assets	2,688	2,921
Equity method investments	684	745
Property, plant and equipment, less accumulated depreciation, depletion and amortization of $17,260 and $21,830	16,730	16,804
Goodwill	95	97
Other noncurrent assets	420	723
Noncurrent assets held for sale	665	31
Total assets	21,282	21,321
Current liabilities:
Accounts payable	1,401	1,320
Payroll and benefits payable	88	154
Accrued taxes	77	181
Other current liabilities	216	170
Long-term debt due within one year	600	0
Current liabilities held for sale	89	7
Total current liabilities	2,471	1,832
Long-term debt	4,902	5,499
Deferred tax liabilities	184	199
Defined benefit postretirement plan obligations	179	195
Asset retirement obligations	189	1,081
Deferred credits and other liabilities	292	279
Noncurrent liabilities held for sale	964	108
Total liabilities	9,181	9,193
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 shares (par value $1 per share, 1.925 billion shares authorized at June 30, 2019 and December 31, 2018)	937	937
Held in treasury, at cost – 133 million shares and 118 million shares	(3,984)	(3,816)
Additional paid-in capital	7,170	7,238
Retained earnings	7,928	7,706
Accumulated other comprehensive income	50	63
Total stockholders’ equity	12,101	12,128
Total liabilities and stockholders’ equity	$ 21,282	$ 21,321