Consolidated Statement of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
OPERATING ACTIVITIES:
Net income (loss)	$ 1,065	$ 661	$ (922)
Adjustments to reconcile to net cash provided (used) by operating activities:
Depreciation, depletion and amortization	756	1,614	1,507
Provision (benefit) for deferred income taxes	206	(179)	(155)
Provision for loss on goodwill, investments, property and other assets	0	882	1,735
Net (gain) loss on dispositions of assets	(52)	(1)	(82)
Gain on reconsolidation of Wilpro entities (Note 3)	(144)	0	0
Amortization of stock-based awards	36	52	48
Early debt retirement costs	0	271	606
Cash provided (used) by changes in current assets and liabilities:
Accounts and notes receivable	27	(197)	(36)
Inventories	5	60	(81)
Other current assets and deferred charges	29	(15)	43
Accounts payable	(110)	250	(14)
Accrued liabilities	0	51	(29)
Other, including changes in noncurrent assets and liabilities	17	(10)	31
Net cash provided (used) by operating activities	1,835	3,439	2,651
FINANCING ACTIVITIES:
Proceeds from long-term debt	3,486	3,172	5,129
Payments of long-term debt	(1,468)	(2,055)	(4,305)
Proceeds from issuance of common stock	2,550	49	12
Proceeds from sale of limited partner units of consolidated partnership	1,559	0	806
Dividends paid	(742)	(457)	(284)
Dividends and distributions paid to noncontrolling interests	(349)	(214)	(145)
Distributions paid to noncontrolling interests on sale of Wilpro assets (Note 3)	(38)	0	0
Cash of WPX Energy, Inc. at spin-off	0	(526)	0
Payments for debt issuance costs	(17)	(50)	(71)
Premiums paid on early debt retirements	0	(254)	(574)
Other - net	55	(7)	5
Net cash provided (used) by financing activities	5,036	(342)	573
INVESTING ACTIVITIES:
Capital expenditures	(2,529)	(2,796)	(2,788)
Purchases of and contributions to equity method investments	(2,651)	(211)	(488)
Purchases of businesses	(2,049)	(41)	(1,099)
Proceeds from dispositions of investments	79	16	46
Cash of Wilpro entities upon reconsolidation (Note 3)	121	0	0
Other - net	108	29	33
Net cash provided (used) by investing activities	(6,921)	(3,003)	(4,296)
Increase (decrease) in cash and cash equivalents	(50)	94	(1,072)
Cash and cash equivalents at beginning of year	889
Cash and cash equivalents at beginning of year		795	1,867
Cash and cash equivalents at end of year	839	889
Cash and cash equivalents at end of year			795
Increases to property, plant and equipment	(2,755)	(2,953)	(2,755)
Changes in related accounts payable and accrued liabilities	226	157	(33)
Capital expenditures	$ (2,529)	$ (2,796)	$ (2,788)