Business Segments (Tables)

12 Months Ended

Dec. 31, 2012

Segment Information

Segment Information	Exploration and Production
(Millions of dollars)	United States			Canada		Malaysia		Republic of the Congo			Other			Total
Year ended December 31, 2012
Segment income (loss)	$	168.0			208.1		894.2		(241.1	)		(124.2	)		905.0
Revenues from external customers		1,038.0			1,084.3		2,428.1		57.6			0.1			4,608.1
Intersegment revenues		0.0			0.0		0.0		0.0			0.0			0.0
Interest income		0.0			0.0		0.0		0.0			0.0			0.0
Interest expense, net of capitalization		0.0			0.0		0.0		0.0			0.0			0.0
Income tax expense (benefit)		99.8			65.1		544.7		(64.5	)		(40.1	)		605.0
Significant noncash charges (credits)
Depreciation, depletion, amortization		330.2			345.8		532.1		33.9			2.4			1,244.4
Accretion of asset retirement obligations		11.4			13.6		12.5		0.9			0.0			38.4
Amortization of undeveloped leases		71.6			29.3		0.0		0.0			28.9			129.8
Impairment of long-lived assets		0.0			0.0		0.0		200.0			0.0			200.0
Deferred and noncurrent income taxes		231.0			72.3		73.3		(0.3	)		(1.2	)		375.1
Additions to property, plant, equipment		1,615.9			887.2		1,426.7		(20.7	)		24.7			3,933.8
Total assets at year-end		3,625.9			4,477.7		4,811.5		112.2			75.6			13,102.9
Year ended December 31, 2011
Segment income (loss)	$	152.7			328.0		812.7		(385.3	)		(293.9	)		614.2
Revenues from external customers		737.7			1,145.8		2,045.6		148.8			24.6			4,102.5
Intersegment revenues		0.0			142.8		0.0		0.0			0.0			142.8
Interest income		0.0			0.0		0.0		0.0			0.0			0.0
Interest expense, net of capitalization		0.0			0.0		0.0		0.0			0.0			0.0
Income tax expense (benefit)		86.5			135.5		434.9		16.4			7.5			680.8
Significant noncash charges (credits)
Depreciation, depletion, amortization		183.0			326.0		357.3		87.8			1.9			956.0
Accretion of asset retirement obligations		9.9			12.5		10.6		0.5			0.3			33.8
Amortization of undeveloped leases		62.2			28.8		0.0		0.0			27.2			118.2
Impairment of long-lived assets		0.0			0.0		0.0		368.6			0.0			368.6
Deferred and noncurrent income taxes		54.2			39.6		84.6		(0.9	)		(0.1	)		177.4
Additions to property, plant, equipment		696.6			885.2		694.8		79.6			20.6			2,376.8
Total assets at year-end		2,227.6			3,746.8		3,826.9		257.5			74.1			10,132.9
Year ended December 31, 2010
Segment income (loss)	$	72.7			213.8		659.4		(77.2	)		(92.3	)		776.4
Revenues from external customers		659.9			780.2		1,837.9		155.7			3.9			3,437.6
Intersegment revenues		0.0			118.9		0.0		0.0			0.0			118.9
Interest income		0.0			0.0		0.0		0.0			0.0			0.0
Interest expense, net of capitalization		0.0			0.0		0.0		0.0			0.0			0.0
Income tax expense (benefit)		30.0			79.1		414.1		20.6			0.5			544.3
Significant noncash charges (credits)
Depreciation, depletion, amortization		281.1			225.5		379.0		95.5			1.5			982.6
Accretion of asset retirement obligations		6.9			11.2		9.8		0.4			0.5			28.8
Amortization of undeveloped leases		68.5			33.7		0.0		0.0			5.8			108.0
Deferred and noncurrent income taxes		(48.6	)		34.5		145.5		(0.9	)		0.0			130.5
Additions to property, plant, equipment		369.4			804.4		467.9		163.6			49.8			1,855.1
Total assets at year-end		1,651.3			3,242.6		3,333.1		678.9			88.9			8,994.8

Segment Information (Continued)	Refining and Marketing
(Millions of dollars)	United States			United Kingdom			Total			Corporate and Other			Discontinued Operations		Consolidated
Year ended December 31, 2012
Segment income (loss)	$	105.4			52.2			157.6			(98.5	)		6.8		970.9
Revenues from external customers		17,723.4			6,283.0			24,006.4			11.5			0.0		28,626.0
Intersegment revenues		0.0			0.0			0.0			0.0			0.0		0.0
Interest income		0.0			0.0			0.0			6.5			0.0		6.5
Interest expense, net of capitalization		0.0			0.0			0.0			14.9			0.0		14.9
Income tax expense (benefit)		72.7			24.7			97.4			(43.5	)		0.0		658.9
Significant noncash charges (credits)
Depreciation, depletion, amortization		75.2			47.3			122.5			8.7			0.0		1,375.6
Accretion of asset retirement obligations		0.9			0.0			0.9			0.0			0.0		39.3
Amortization of undeveloped leases		0.0			0.0			0.0			0.0			0.0		129.8
Impairment of long-lived assets		61.0			0.0			61.0			0.0			0.0		261.0
Deferred and noncurrent income taxes		(20.0	)		(6.2	)		(26.2	)		(32.3	)		0.0		316.6
Additions to property, plant, equipment		111.5			22.2			133.7			8.2			58.1		4,133.8
Total assets at year-end		2,026.5			1,160.3			3,186.8			1,009.6			223.3		17,522.6
Year ended December 31, 2011
Segment income (loss)	$	223.6			(33.3	)		190.3			(75.0	)		143.2		872.7
Revenues from external customers		17,471.9			6,030.3			23,502.2			33.4			0.0		27,638.1
Intersegment revenues		0.0			0.0			0.0			0.0			0.0		142.8
Interest income		0.0			0.0			0.0			10.1			0.0		10.1
Interest expense, net of capitalization		0.0			0.0			0.0			40.7			0.0		40.7
Income tax expense (benefit)		146.6			(12.1	)		134.5			(52.1	)		0.0		763.2
Significant noncash charges (credits)
Depreciation, depletion, amortization		68.3			46.7			115.0			8.7			0.0		1,079.7
Accretion of asset retirement obligations		0.9			0.0			0.9			0.0			0.0		34.7
Amortization of undeveloped leases		0.0			0.0			0.0			0.0			0.0		118.2
Impairment of long-lived assets		0.0			0.0			0.0			0.0			0.0		368.6
Deferred and noncurrent income taxes		28.5			(5.3	)		23.2			(43.6	)		0.0		157.0
Additions to property, plant, equipment		100.1			22.2			122.3			5.3			67.8		2,572.2
Total assets at year-end		1,806.5			1,193.8			3,000.3			790.8			214.1		14,138.1
Year ended December 31, 2010
Segment income (loss)	$	165.3			(34.7	)		130.6			(157.9	)		49.0		798.1
Revenues from external customers		13,750.4			2,905.0			16,655.4			(56.9	)		0.0		20,036.1
Intersegment revenues		0.0			0.0			0.0			0.0			0.0		118.9
Interest income		0.0			0.0			0.0			6.9			0.0		6.9
Interest expense, net of capitalization		0.0			0.0			0.0			34.7			0.0		34.7
Income tax expense (benefit)		101.8			(22.3	)		79.5			(47.2	)		0.0		576.6
Significant noncash charges (credits)
Depreciation, depletion, amortization		60.1			41.4			101.5			8.0			0.0		1,092.1
Accretion of asset retirement obligations		0.8			0.0			0.8			0.0			0.0		29.6
Amortization of undeveloped leases		0.0			0.0			0.0			0.0			0.0		108.0
Deferred and noncurrent income taxes		5.1			3.2			8.3			7.8			0.0		146.6
Additions to property, plant, equipment		221.0			69.1			290.1			5.9			112.6		2,263.7
Total assets at year-end		2,996.6			1,113.6			4,110.2			940.3			187.9		14,233.2

Geographic Information on Certain Long-Lived Assets

Geographic Information	Certain Long-Lived Assets at December 31
(Millions of dollars)	United States		Canada		Malaysia		United Kingdom		Republic of the Congo		Other		Total
2012	$	4,177.4		4,190.5		4,101.2		703.2		5.9		39.2		13,217.4
2011		2,953.1		3,493.4		3,154.8		694.7		133.7		52.2		10,481.9
2010		3,178.8		3,028.8		2,807.0		706.3		579.4		74.3		10,374.6

Geographic Information on Revenues from External Customers

Geographic Information	Revenues from External Customers for the Year
(Millions of dollars)	United States		Canada		Malaysia		United Kingdom		Republic of the Congo		Other		Total
2012	$	18,729.9		1,119.9		2,415.6		6,302.7		57.6		0.3		28,626.0
2011		18,184.0		1,180.3		2,063.0		6,037.4		148.8		24.6		27,638.1
2010		14,386.6		809.3		1,793.8		2,885.1		156.5		4.8		20,036.1