Business Segments (Tables)

12 Months Ended

Dec. 31, 2011

Segment Information

Segment Information

	Exploration and Production
(Millions of dollars)	United States			Canada			Malaysia		United Kingdom			Republic of the Congo			Other			Total
Year ended December 31, 2011
Segment income (loss)	$	152.7			328.0			812.7		11.5			(385.3	)		(293.9	)		625.7
Revenues from external customers		737.7			1,145.8			2,045.6		107.3			148.8			24.6			4,209.8
Intersegment revenues		0.0			142.8			0.0		0.0			0.0			0.0			142.8
Interest income		0.0			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			0.0
Income tax expense (benefit)		86.5			135.5			434.9		46.8			16.4			7.5			727.6
Significant noncash charges (credits)
Depreciation, depletion, amortization		183.0			326.0			357.3		13.7			87.8			1.9			969.7
Accretion of asset retirement obligations		9.9			12.5			10.6		3.0			0.5			0.3			36.8
Amortization of undeveloped leases		62.2			28.8			0.0		0.0			0.0			27.2			118.2
Impairment of long-lived assets		0.0			0.0			0.0		0.0			368.6			0.0			368.6
Deferred and noncurrent income taxes		54.2			39.6			84.6		14.6			(0.9	)		(0.1	)		192.0
Additions to property, plant, equipment		696.6			885.2			694.8		19.7			79.6			20.6			2,396.5
Total assets at year-end		2,227.6			3,746.8			3,826.9		214.1			257.5			74.1			10,347.0
Year ended December 31, 2010
Segment income (loss)	$	72.7			213.8			659.4		30.5			(77.2	)		(92.3	)		806.9
Revenues from external customers		659.9			780.2			1,837.9		133.6			155.7			3.9			3,571.2
Intersegment revenues		0.0			118.9			0.0		0.0			0.0			0.0			118.9
Interest income		0.0			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			0.0
Income tax expense (benefit)		30.0			79.1			414.1		32.6			20.6			0.5			576.9
Significant noncash charges (credits)
Depreciation, depletion, amortization		281.1			225.5			379.0		22.4			95.5			1.5			1,005.0
Accretion of asset retirement obligations		6.9			11.2			9.8		2.3			0.4			0.5			31.1
Amortization of undeveloped leases		68.5			33.7			0.0		0.0			0.0			5.8			108.0
Deferred and noncurrent income taxes		(48.6	)		34.5			145.5		(11.4	)		(0.9	)		0.0			119.1
Additions to property, plant, equipment		369.4			804.4			467.9		(4.7	)		163.6			49.8			1,850.4
Total assets at year-end		1,651.3			3,242.6			3,333.1		187.9			678.9			88.9			9,182.7
Year ended December 31, 2009
Segment income (loss)	$	178.0			64.8			561.9		12.6			(20.6	)		(104.9	)		691.8
Revenues from external customers		708.6			635.2			1,526.4		61.6			16.5			2.4			2,950.7
Intersegment revenues		0.0			85.3			0.0		0.0			0.0			0.0			85.3
Interest income		0.0			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			0.0
Income tax expense (benefit)		88.4			21.0			354.1		11.9			1.3			(0.6	)		476.1
Significant noncash charges (credits)
Depreciation, depletion, amortization		246.5			199.9			304.1		12.4			11.5			1.4			775.8
Accretion of asset retirement obligations		6.8			8.6			7.8		1.6			0.1			0.6			25.5
Amortization of undeveloped leases		34.7			44.1			0.0		0.0			0.0			4.4			83.2
Impairment of long-lived assets		5.2			0.0			0.0		0.0			0.0			0.0			5.2
Deferred and noncurrent income taxes		(4.6	)		(7.2	)		77.6		(0.9	)		0.0			(0.1	)		64.8
Additions to property, plant, equipment		336.8			330.1			739.0		17.2			194.9			7.6			1,625.6
Total assets at year-end		1,679.7			2,507.8			3,249.6		209.0			516.7			33.5			8,196.3

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
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
2009		2,907.2		2,324.6		2,714.9		704.7		399.9		20.5		9,071.8

Segment Information

Segment Information (Continued)

	Refining and Marketing							Corporate and Other			Discontinued Operations		Consolidated
(Millions of dollars)	United States		United Kingdom			Total
Year ended December 31, 2011
Segment income (loss)	$	223.6		(33.3	)		190.3		(75.1	)		131.8		872.7
Revenues from external customers		17,471.9		6,030.3			23,502.2		33.5			0.0		27,745.5
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		(52.0	)		0.0		810.1
Significant noncash charges (credits)
Depreciation, depletion, amortization		68.3		46.7			115.0		8.7			0.0		1,093.4
Accretion of asset retirement obligations		0.9		0.0			0.9		0.0			0.0		37.7
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		171.6
Additions to property, plant, equipment		100.1		22.2			122.3		5.3			48.1		2,572.2
Total assets at year-end		1,806.5		1,193.8			3,000.3		790.8			0.0		14,138.1
Year ended December 31, 2010
Segment income (loss)	$	165.3		(34.7	)		130.6		(157.9	)		18.5		798.1
Revenues from external customers		13,750.4		2,905.0			16,655.4		(56.9	)		0.0		20,169.7
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		609.2
Significant noncash charges (credits)
Depreciation, depletion, amortization		60.1		41.4			101.5		8.0			0.0		1,114.5
Accretion of asset retirement obligations		0.8		0.0			0.8		0.0			0.0		31.9
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		135.2
Additions to property, plant, equipment		221.0		69.1			290.1		5.9			117.3		2,263.7
Total assets at year-end		2,996.6		1,113.6			4,110.2		940.3			0.0		14,233.2
Year ended December 31, 2009
Segment income (loss)	$	65.5		(20.5	)		45.0		(23.0	)		123.8		837.6
Revenues from external customers		11,116.4		2,725.9			13,842.3		102.2			0.0		16,895.2
Intersegment revenues		0.0		0.0			0.0		0.0			0.0		85.3
Interest income		0.0		0.0			0.0		51.7			0.0		51.7
Interest expense, net of capitalization		0.0		0.0			0.0		24.4			0.0		24.4
Income tax expense (benefit)		42.3		(1.0	)		41.3		4.2			0.0		521.6
Significant noncash charges (credits)
Depreciation, depletion, amortization		55.4		33.8			89.2		6.0			0.0		871.0
Accretion of asset retirement obligations		0.7		0.0			0.7		0.0			0.0		26.2
Amortization of undeveloped leases		0.0		0.0			0.0		0.0			0.0		83.2
Impairment of long-lived assets		0.0		0.0			0.0		0.0			0.0		5.2
Deferred and noncurrent income taxes		9.5		15.9			25.4		5.0			0.0		95.2
Additions to property, plant, equipment		161.6		101.8			263.4		23.0			113.3		2,025.3
Total assets at year-end		2,490.6		939.8			3,430.4		1,129.7			0.0		12,756.4

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
2011	$	18,184.0		1,180.3		2,063.0		6,144.8		148.8		24.6		27,745.5
2010		14,386.6		809.3		1,793.8		3,018.7		156.5		4.8		20,169.7
2009		11,855.9		652.5		1,526.4		2,838.7		16.5		5.2		16,895.2