CONSOLIDATED CONDENSED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
CASH FLOW FROM OPERATING ACTIVITIES
Net income	$ 117	$ 78
Adjustments to reconcile net income to net cash provided by operating activities:
Discontinued operations, net		(438)
Depreciation, depletion and amortization of assets	942	1,102
Deferred income tax (benefit) provision	(108)	77
Other noncash charges to income	85	63
Asset impairments and related items	13	78
Gain on sale of assets, net		(138)
Changes in operating assets and liabilities, net	(389)	(316)
Other operating, net	(8)	(367)
Operating cash flow from continuing operations	652	139
Operating cash flow from discontinued operations		550
Net cash provided by operating activities	652	689
CASH FLOW FROM INVESTING ACTIVITIES
Capital expenditures	(722)	(646)
Change in capital accrual	(41)	(208)
Proceeds from sale of assets and equity investments, net		285
Payments for purchases of assets and businesses	(19)	(24)
Other investing, net	(37)	(44)
Net cash used by investing activities	(819)	(637)
CASH FLOW FROM FINANCING ACTIVITIES
Change in restricted cash		1,193
Payment of long-term debt, net		(700)
Proceeds from issuance of common stock	12	11
Purchases of treasury stock		(7)
Cash dividends paid	(584)	(574)
Net cash used by financing activities	(572)	(77)
Decrease in cash and cash equivalents	(739)	(25)
Cash and cash equivalents - beginning of period	2,233	3,201
Cash and cash equivalents - end of period	$ 1,494	$ 3,176