CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
CASH FLOW FROM OPERATING ACTIVITIES
Net income	$ 1,266	$ 1,556
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization of assets	2,004	1,868
Deferred income tax provision	47	171
Other noncash charges to income	351	96
Asset impairments and related items	0	42
Gain on sale of assets, net	(22)	(43)
Undistributed earnings from equity investments	(64)	(20)
Dry hole expenses	21	15
Changes in operating assets and liabilities, net	(642)	(920)
Net cash provided by operating activities	2,961	2,765
CASH FLOW FROM INVESTING ACTIVITIES
Capital expenditures	(2,470)	(2,319)
Change in capital accrual	(108)	(6)
Payments for purchases of assets and businesses	(76)	(242)
Sales of assets, net	32	330
Equity investments and other, net	(81)	(49)
Net cash used by investing activities	(2,703)	(2,286)
CASH FLOW FROM FINANCING ACTIVITIES
Proceeds from long-term debt, net of issuance costs	(108)	978
Payments of long-term debt	0	(500)
Preferred stock issuance costs	(50)	0
Proceeds from issuance of common stock	37	13
Purchase of treasury stock	(237)	(97)
Cash dividends paid	(1,178)	(1,185)
Other financing, net	(4)	2
Net cash used by financing activities	(1,540)	(789)
Decrease in cash and cash equivalents	(1,282)	(310)
Cash and cash equivalents — beginning of period	3,033	1,672
Cash and cash equivalents — end of period	$ 1,751	$ 1,362