Comprehensive Income (Loss) (Schedule Of Comprehensive Income (Loss)) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011		Jun. 30, 2012	Jun. 30, 2011
Income (loss) from continuing operations	$ 248	$ (125)	[1]	$ 496	$ (226)	[1]
Income (loss) from continuing operations	(87)	(51)	[1]	(139)	(80)	[1]
Income (loss) from continuing operations	331	68	[1]	630	(3)	[1]
Income (loss) from discontinued operations		(3)	[1]	(1)	5	[1]
Income (loss) from discontinued operations	4	(139)	[1]	6	(148)	[1]
Net income (loss)	335	(71)	[1]	636	(151)	[1]
Reclassification to earnings of settlement and curtailment losses and prior service benefit and actuarial loss amortization	12	12		18	21
Retirement benefit plans funded status adjustment				38
Net hedging gains (losses)	18	10		(16)	(5)
Reclassification of net hedging (gains) losses to earnings	(21)	(6)		10	7
Net increase in unrealized gain on available-for-sale securities				1
Comprehensive income (loss)	257	(109)	[1]	549	(203)	[1]
Comprehensive income (loss)	(87)	(54)	[1]	(138)	(75)	[1]
Comprehensive income (loss)	344	(55)	[1]	687	(128)	[1]
Sunoco, Inc. [Member]
Income (loss) from continuing operations	244	17		491	(83)
Income (loss) from discontinued operations	4	(142)		5	(143)
Net income (loss)	248	(125)		496	(226)
Reclassification to earnings of settlement and curtailment losses and prior service benefit and actuarial loss amortization	12	12		18	21
Retirement benefit plans funded status adjustment				38
Net hedging gains (losses)	18	10		(13)	(5)
Reclassification of net hedging (gains) losses to earnings	(21)	(6)		9	7
Net increase in unrealized gain on available-for-sale securities				1
Comprehensive income (loss)	257	(109)		549	(203)
Noncontrolling Interest [Member]
Income (loss) from continuing operations	87	51		139	80
Income (loss) from discontinued operations		3		1	(5)
Net income (loss)	87	54		140	75
Net hedging gains (losses)				(3)
Reclassification of net hedging (gains) losses to earnings				1
Comprehensive income (loss)	$ 87	$ 54		$ 138	$ 75

[1] Reclassified to conform to 2012 presentation (Note 2).