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Consolidated Statements of Income (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012
Revenues | $ 4,288 | $ 4,475 | $ 8,871 | $ 9,080
Cost of sales: |  |  |  |
Production and delivery | 2,853 | 2,622 | 5,572 | 5,050
Depreciation, depletion and amortization | 530 | 291 | 859 | 558
Total cost of sales | 3,383 | 2,913 | 6,431 | 5,608
Selling, general and administrative expenses | 186 | 97 | 299 | 201
Mining exploration and research expenses | 64 | 73 | 116 | 135
Environmental obligations and shutdown costs | 16 | 81 | 31 | 91
Total costs and expenses | 3,649 | 3,164 | 6,877 | 6,035
Operating income | 639 | 1,311 | 1,994 | 3,045
Interest expense, net | (132) | (43) | (189) | (106)
Losses on early extinguishment of debt | 0 | 0 | (45) | (168)
Gain on investment in McMoRan Exploration Co. | 128 | 0 | 128 | 0
Other income, net | 13 | 51 | 10 | 38
Income before income taxes and equity in affiliated companies' net earnings | 648 | 1,319 | 1,898 | 2,809
Provision for income taxes | (40) | (422) | (468) | (913)
Equity in affiliated companies' net earnings (losses) | 2 | (3) | 4 | (1)
Net income | 610 | 894 | 1,434 | 1,895
Net income attributable to noncontrolling interests | (128) | (184) | (304) | (421)
Net income attributable to FCX common stockholders | $ 482 | $ 710 | $ 1,130 | $ 1,474
Net income per share attributable to FCX common stockholders: |  |  |  |
Basic | $ 0.49 | $ 0.75 | $ 1.17 | $ 1.55
Diluted | $ 0.49 | $ 0.74 | $ 1.17 | $ 1.55
Weighted-average common shares outstanding: |  |  |  |
Basic | 980 | 949 | 965 | 949
Diluted | 984 | 953 | 968 | 954
Dividends declared per share of common stock | $ 1.3125 | $ 0.3125 | $ 1.625 | $ 0.625

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- Definition Exploration expenses (including prospecting) related to the mining industry would be included in operating expenses. Exploration costs include costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of mineral reserves. Research and development costs are the aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References No definition available. + Details
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