Consolidated Statement of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
OPERATING ACTIVITIES:
Net income (loss)	$ 422	$ 660
Adjustments to reconcile to net cash provided (used) by operating activities:
Depreciation and amortization	399	349
Provision (benefit) for deferred income taxes	261	117
Net (gain) loss on dispositions of assets	(1)	(61)
Gain on reconsolidation of Wilpro entities (Note 3)	0	(144)
Amortization of stock-based awards	20	18
Cash provided (used) by changes in current assets and liabilities:
Accounts and notes receivable	(10)	88
Inventories	2	10
Other current assets and deferred charges	(8)	39
Accounts payable	(22)	(174)
Accrued liabilities	42	(41)
Other, including changes in noncurrent assets and liabilities	58	(3)
Net cash provided (used) by operating activities	1,163	858
FINANCING ACTIVITIES:
Proceeds from (payments of) commercial paper - net	710	0
Proceeds from long-term debt	1,705	500
Payments of long-term debt	(2,081)	(180)
Proceeds from issuance of common stock	9	928
Proceeds from sale of limited partner units of consolidated partnership	617	1,071
Dividends paid	(472)	(342)
Dividends and distributions paid to noncontrolling interests	(224)	(152)
Distributions paid to noncontrolling interests on sale of Wilpro assets (Note 3)	0	(38)
Contributions from noncontrolling interests	272	2
Other - net	12	33
Net cash provided (used) by financing activities	548	1,822
INVESTING ACTIVITIES:
Capital expenditures	(1,530)	(922)
Purchases of and contributions to equity method investments	(188)	(184)
Purchases of businesses	0	(2,049)
Proceeds from dispositions of investments	0	78
Cash of Wilpro entities upon reconsolidation (Note 3)	0	121
Other - net	(8)	66
Net cash provided (used) by investing activities	(1,726)	(2,890)
Increase (decrease) in cash and cash equivalents	(15)	(210)
Cash and cash equivalents at beginning of period	839	889
Cash and cash equivalents at end of period	824	679
Increases to property, plant and equipment	(1,605)	(999)
Changes in related accounts payable and accrued liabilities	75	77
Capital expenditures	$ (1,530)	$ (922)