Cash Flow Disclosures (Tables)

3 Months Ended

Mar. 31, 2014

Supplemental Cash Flow Elements [Abstract]

Cash Flow Activities

Additional disclosures regarding cash flow activities are provided below.

	Three Months
	Ended March 31,
(Thousands of dollars)	2014			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
Supplementary disclosures (including discontinued operations):
Cash income taxes paid	$	101,295			47,877
Interest paid less than amounts capitalized		(4,303	)		(10,519	)