Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flow from operating activities:
Net income	$ 4,881	$ 3,580
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	756	788
Stock-based compensation	92	93
Charges for reclamation and environmental obligations, including accretion	144	117
Payments of reclamation and environmental obligations	(131)	(139)
Losses on early extinguishment of debt	68	77
Deferred income taxes	419	252
Increase in long-term mill and leach stockpiles	(174)	(73)
Changes in other assets and liabilities	(34)	16
Other, net	(21)	36
(Increases) decreases in working capital:
Accounts receivable	1,034	(391)
Inventories	(266)	(189)
Other current assets	(152)	(13)
Accounts payable and accrued liabilities	(101)	156
Accrued income and other taxes	(641)	(92)
Net cash provided by operating activities	5,874	4,218
Capital expenditures:
North America copper mines	(342)	(140)
South America	(431)	(283)
Indonesia	(463)	(311)
Africa	(89)	(59)
Molybdenum	(317)	(34)
Other	(107)	(50)
Other, net	24	20
Net cash used in investing activities	(1,725)	(857)
Cash flow from financing activities:
Proceeds from debt	37	52
Repayments of debt	(1,303)	(1,678)
Cash dividends and distributions paid:
Common stock	(1,186)	(272)
Preferred stock	0	(95)
Noncontrolling interests	(350)	(330)
Contributions from noncontrolling interests	27	24
Net proceeds from (payments for) stock-based awards	2	(3)
Excess tax benefit from stock-based awards	23	5
Other, net	(9)	0
Net cash used in financing activities	(2,759)	(2,297)
Net increase in cash and cash equivalents	1,390	1,064
Cash and cash equivalents at beginning of year	3,738	2,656
Cash and cash equivalents at end of period	$ 5,128	$ 3,720