Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
OPERATING ACTIVITIES:
Net income (loss)	$ 270	$ 569
Adjustments to reconcile to net cash provided (used) by operating activities:
Depreciation and amortization	431	442
Provision (benefit) for deferred income taxes	73	28
Equity (earnings) losses	(82)	(107)
Distributions from unconsolidated affiliates	140	190
Net (gain) loss on disposition of equity-method investments	0	(269)
Amortization of stock-based awards	14	21
Cash provided (used) by changes in current assets and liabilities:
Accounts and notes receivable	238	29
Inventories	(40)	(30)
Other current assets and deferred charges	(4)	18
Accounts payable	(197)	32
Accrued liabilities	(166)	(133)
Other, including changes in noncurrent assets and liabilities	17	(63)
Net cash provided (used) by operating activities	694	727
FINANCING ACTIVITIES:
Proceeds from (payments of) commercial paper – net	0	(93)
Proceeds from long-term debt	2,048	470
Payments of long-term debt	(1,060)	(2,000)
Proceeds from issuance of common stock	10	2,122
Dividends paid	(281)	(248)
Dividends and distributions paid to noncontrolling interests	(165)	(242)
Contributions from noncontrolling interests	3	4
Payments for debt issuance costs	(18)	0
Other – net	(40)	(28)
Net cash provided (used) by financing activities	497	(15)
INVESTING ACTIVITIES:
Capital expenditures (1)	(957)	(511)
Dispositions – net	(1)	(2)
Contributions in aid of construction	190	131
Proceeds from dispositions of equity-method investments	0	200
Purchases of and contributions to equity-method investments	(21)	(52)
Other – net	(9)	(9)
Net cash provided (used) by investing activities	(798)	(243)
Increase (decrease) in cash and cash equivalents	393	469
Cash and cash equivalents at beginning of year	899	170
Cash and cash equivalents at end of period	1,292	639
(1) Increases to property, plant, and equipment	(934)	(569)
Changes in related accounts payable and accrued liabilities	(23)	58
Capital expenditures (1)	$ (957)	$ (511)