Cash Flow Activities (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net (increase) decrease in operating working capital other than cash and cash equivalents (from continuing operations):
Decrease (increase) in accounts receivable	$ (7,251)	$ 49,060
Decrease in inventories	958	17,089
Increase in prepaid expenses	(42,128)	(53,970)
Decrease in deferred income tax assets	6,845	27,427
Decrease in accounts payable and accrued liabilities	(4,923)	(66,680)
Increase in current income tax liabilities	65,172	128,023
Total	18,673	100,949	[1]
Supplementary disclosures (including discontinued operations):
Cash income taxes paid	101,295	47,877
Interest paid less than amounts capitalized	$ (4,303)	$ (10,519)

[1] Reclassified to conform to current presentation.