Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
OPERATING ACTIVITIES:
Net income (loss)	$ 569	$ (13)
Adjustments to reconcile to net cash provided (used) by operating activities:
Depreciation and amortization	442	445
Provision (benefit) for deferred income taxes	28	2
Net (gain) loss on disposition of equity-method investments	(269)	0
Impairment of equity-method investments	0	112
Amortization of stock-based awards	21	21
Cash provided (used) by changes in current assets and liabilities:
Accounts and notes receivable	29	298
Inventories	(30)	(16)
Other current assets and deferred charges	18	16
Accounts payable	32	(23)
Accrued liabilities	(133)	(141)
Other, including changes in noncurrent assets and liabilities	(101)	82
Net cash provided (used) by operating activities	606	783
FINANCING ACTIVITIES:
Proceeds from (payments of) commercial paper – net	(93)	(365)
Proceeds from long-term debt	470	2,688
Payments of long-term debt	(2,000)	(1,991)
Proceeds from issuance of common stock	2,122	6
Dividends paid	(248)	(480)
Dividends and distributions paid to noncontrolling interests	(242)	(236)
Contributions from noncontrolling interests	4	16
Payments for debt issuance costs	0	(8)
Other – net	(28)	(3)
Net cash provided (used) by financing activities	(15)	(373)
INVESTING ACTIVITIES:
Capital expenditures (1)	(511)	(513)
Net proceeds from dispositions	(2)	24
Proceeds from dispositions of equity-method investments	200	0
Purchases of and contributions to equity-method investments	(52)	(63)
Distributions from unconsolidated affiliates in excess of cumulative earnings	121	109
Other – net	122	97
Net cash provided (used) by investing activities	(122)	(346)
Increase (decrease) in cash and cash equivalents	469	64
Cash and cash equivalents at beginning of year	170	100
Cash and cash equivalents at end of period	639	164
(1) Increases to property, plant, and equipment	(569)	(525)
Changes in related accounts payable and accrued liabilities	58	12
Capital expenditures (1)	$ (511)	$ (513)