Cash Flow Activities (Detail) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Net (increase) decrease in operating working capital other than cash and cash equivalents:
(Increase) decrease in accounts receivable	$ (314,908)	$ 99,628
(Increase) decrease in inventories	(31,865)	(104,464)
(Increase) decrease in prepaid expenses	(28,693)	(2,045)
(Increase) decrease in deferred income tax assets	4,797	(59,254)
Increase (decrease) in accounts payable and accrued liabilities	185,618	412,015
Increase (decrease) in current income tax liabilities	(124,385)	71,357
Total	(309,436)	417,237	[1]
Supplementary disclosures:
Cash income taxes paid	608,065	419,313
Interest paid, net of amounts capitalized	$ 18,124	$ 17,162

[1] Reclassified to conform to current presentation