Oil Refinery (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012	Jun. 30, 2013		Jun. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Operating Revenue	$ 9,707		$ 9,732	$ 18,207		$ 18,145
Operating Income (Loss)	914		134	1,136		516
Interest Expense, Net	172			350
Depreciation and amortization	415		388	820		774
Total assets	45,772			45,772			44,550
Capital Expenditures	338			985
Airline [Member]
Segment Reporting Information [Line Items]
Operating Revenue	9,707			18,207
Operating Income (Loss)	965			1,209
Interest Expense, Net	172			350
Depreciation and amortization	411			812
Total assets	44,567			44,567
Capital Expenditures	332			973
Refinery [Member]
Segment Reporting Information [Line Items]
Operating Revenue	1,864			3,595
Operating Income (Loss)	(51)			(73)
Interest Expense, Net	0			0
Depreciation and amortization	4			8
Total assets	1,205			1,205
Capital Expenditures	6			12
Segment Allocations [Member]
Segment Reporting Information [Line Items]
Derivative, Gain (Loss) on Derivative, Net	25			44
Sales to airline segment [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenue	(315)	[1]		(607)	[1]
Exchanged products [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenue	(1,347)	[1]		(2,668)	[1]
Sales of refined products to third parties [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Operating Revenue	$ (202)	[1]		$ (320)	[1]

[1] Represents transfers, valued on a market price basis, from the refinery to the airline segment for use in airline operations. We determine market price by reference to the market index for the primary delivery location for jet fuel from the refinery, which is New York harbor.