CONDENSED CONSOLIDATED STATEMENT OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
OPERATING ACTIVITIES
Net income	$ 374,105	$ 565,336	$ 871,138	$ 1,188,898
Adjustments to reconcile net earnings to net cash provided from operating activities:
Depreciation, amortization and depletion	93,516	78,428	184,088	155,372
Equity earnings of affiliate, net of dividends received	2,654	(14,285)	(5,509)	(16,939)
Loss (income) on currency translation effect	(2,831)	(14,191)	11,063	(6,660)
Provision for deferred income taxes	16,426	31,817	10,681	19,308
Gain on sale of investment		(18,200)		(18,200)
Cash provided from (used for) operating assets and liabilities:
Accounts receivable	101,299	4,013	180,963	63,060
Inventories	(32,512)	(44,712)	(63,627)	(32,900)
Accounts payable and accrued liabilities	(252,402)	(199,645)	(187,892)	(234,500)
Other operating assets and liabilities	5,684	(11,494)	(100,494)	(19,965)
Net cash provided from operating activities	305,939	377,067	900,411	1,097,474
INVESTING ACTIVITIES
Capital expenditures	(385,454)	(230,303)	(702,252)	(407,720)
Proceeds from (purchase of) short-term investments, net	(188,445)	(146,495)	(258,635)	148,199
Sale of investment		18,200		18,200
Loan repayment from affiliate, net	2,679		13,252
Sale of property	(2,697)	5,182	(2,473)	5,280
Net cash used for investing activities	(573,917)	(353,416)	(950,108)	(236,041)
FINANCING ACTIVITIES
Debt repaid	(5,000)	(5,000)	(5,000)	(5,000)
Dividends paid to common stockholders	(169,102)	(450,349)	(372,034)	(610,160)
Distributions to non-controlling interest	(394)	(1,248)	(866)	(1,720)
Repurchase of common shares	(64,560)	(33,184)	(64,560)	(33,184)
Other	532	451	790	604
Net cash used for financing activities	(238,524)	(489,330)	(441,670)	(649,460)
Effect of exchange rate changes on cash and cash equivalents	(16,166)	26,869	(28,439)	19,280
Increase (decrease) in cash and cash equivalents	(522,668)	(438,810)	(519,806)	231,253
Cash and cash equivalents, at beginning of period	2,462,350	1,518,181	2,459,488	848,118
Cash and cash equivalents, at end of period	$ 1,939,682	$ 1,079,371	$ 1,939,682	$ 1,079,371