CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013
OPERATING ACTIVITIES
Net income	$ 284,665		$ 763,243	[1]
Adjustments to reconcile net income to net cash provided by operating activities
Loss (income) from discontinued operations	27,289		(320,671)	[1]
Depreciation, depletion and amortization	855,242		744,526	[1]
Impairment of assets	0		21,587	[1]
Amortization of deferred major repair costs	4,313		4,415	[1]
Dry hole costs	127,827		81,305	[1]
Amortization of undeveloped leases	37,764		32,052	[1]
Accretion of asset retirement obligations	24,392		23,857	[1]
Deferred and noncurrent income tax charges	18,122		72,745	[1]
Pretax loss from disposition of assets	4,997		224	[1]
Net (increase) decrease in noncash operating working capital	48,449		(131,812)	[1]
Other operating activities, net	22,106		(22,487)	[1]
Net cash provided by continuing operations	1,455,166		1,268,984	[1]
Net cash provided by discontinued operations	4,517		400,026	[1]
Net cash provided by operating activities	1,459,683		1,669,010	[1]
INVESTING ACTIVITIES
Property additions and dry hole costs	(1,840,544)	[2]	(1,853,902)	[1],[2]
Proceeds from sales of assets	3,089		130	[1]
Purchase of investment securities	(372,861)	[3]	(373,196)	[1],[3]
Proceeds from maturity of investment securities	320,331	[3]	358,915	[1],[3]
Investing activities of discontinued operations
Sales proceeds	0		282,202	[1]
Property additions and other	(9,092)		(122,807)	[1]
Other - net	(13,007)		1,718	[1]
Net cash required by investing activities	(1,912,084)		(1,706,940)	[1]
FINANCING ACTIVITIES
Borrowings of long-term debt	850,000	[2]	461,978	[1],[2]
Purchase of treasury stock	(375,000)		(250,000)	[1]
Proceeds from exercise of stock options and employee stock purchase plans	0		2,628	[1]
Withholding tax on stock-based incentive awards	(6,784)		(8,966)	[1]
Cash dividends paid	(112,126)		(119,376)	[1]
Other - net	(1,224)		(2,724)	[1]
Net cash provided by financing activities	354,866		83,540	[1]
Effect of exchange rate changes on cash and cash equivalents	8,466		(18,500)	[1]
Net increase (decrease) in cash and cash equivalents	(89,069)		27,110	[1]
Cash and cash equivalents, beginning	750,155		947,316	[1]
Cash and cash equivalents, ending	$ 661,086		$ 974,426	[1]

[1] Reclassified to conform to current presentation.

[2] Excludes non-cash asset and long-term obligation of $356,170 in 2013 associated with lease commencement for production equipment at the Kakap field offshore Malaysia.

[3] Investments are Canadian government securities with maturities greater than 90 days at the date of acquisition.