Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash flow from operating activities:
Net income	$ 1,895	$ 3,587
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, depletion and amortization	558	499
Stock-based compensation	54	69
Pension plans contributions	(75)	0
Charges for reclamation and environmental obligations, including accretion	112	79
Payments of reclamation and environmental obligations	(98)	(88)
Losses on early extinguishment of debt	168	68
Deferred income taxes	288	337
(Increase) decrease in long-term mill and leach stockpiles	(162)	(98)
Other, net	17	(32)
(Increases) decreases in working capital and other tax payments:
Accounts receivable	(182)	577
Inventories	(160)	(346)
Other current assets	(11)	0
Accounts payable and accrued liabilities	(117)	(184)
Accrued income and other tax payments	(304)	(429)
Net cash provided by operating activities	1,983	4,039
Capital expenditures:
North America copper mines	(297)	(204)
South America	(392)	(257)
Indonesia	(387)	(301)
Africa	(297)	(40)
Molybdenum	(153)	(162)
Other	(21)	(68)
Other, net	(4)	19
Net cash used in investing activities	(1,551)	(1,013)
Cash flow from financing activities:
Proceeds from debt	3,016	23
Repayments of debt	(3,171)	(1,288)
Cash dividends paid:
Common stock	(535)	(949)
Noncontrolling interests	(38)	(195)
Contributions from noncontrolling interests	0	13
Net payments for stock-based awards	(3)	(3)
Excess tax benefit from stock-based awards	7	22
Other, net	(22)	(9)
Net cash used in financing activities	(746)	(2,386)
Net (decrease) increase in cash and cash equivalents	(314)	640
Cash and cash equivalents at beginning of year	4,822	3,738
Cash and cash equivalents at end of period	$ 4,508	$ 4,378