Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 1,462	$ 563
Receivables, less reserve of $11 and $12	1,079	1,082
Notes receivable	0	748
Inventories	96	126
Other current assets	257	36
Current assets held for sale	27	11
Total current assets	2,921	2,566
Equity method investments	745	847
Property, plant and equipment, less accumulated depreciation, depletion and amortization of $21,830 and $21,564	16,804	17,665
Goodwill	97	115
Other noncurrent assets	723	764
Noncurrent assets held for sale	31	55
Total assets	21,321	22,012
Current liabilities:
Accounts payable	1,320	1,395
Payroll and benefits payable	154	108
Accrued taxes	181	177
Other current liabilities	170	288
Current liabilities held for sale	7	0
Total current liabilities	1,832	1,968
Long-term debt	5,499	5,494
Deferred tax liabilities	199	833
Defined benefit postretirement plan obligations	195	362
Asset retirement obligations	1,081	1,428
Deferred credits and other liabilities	279	217
Noncurrent liabilities held for sale	108	2
Total liabilities	9,193	10,304
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, 1.925 billion shares authorized at December 31, 2018 and 1.1 billion shares authorized at December 31, 2017)	937	937
Held in treasury, at cost – 118 million shares and 87 million shares	(3,816)	(3,325)
Additional paid-in capital	7,238	7,379
Retained earnings	7,706	6,779
Accumulated other comprehensive loss	63	(62)
Total stockholders equity	12,128	11,708
Total liabilities and stockholders equity	$ 21,321	$ 22,012