Derivative And Financial Instruments (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Derivative And Financial Instruments
Number of barrels of jet fuel derivative contracts outstanding			27
Fuel derivative maturity in months			18
Decrease and increase in fuel expense	$ (136)	$ 64	$ (237)	$ 114
Derivative instruments hedging agreements fair value	314		314		257
Cash collateral received			126
Derivative charges recognized in other comprehensive income (loss)	$ (566)	$ (50)	$ (580)	$ (466)

Derivative Cash Received On Hedge

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- Definition

Derivative Contract Maturity Term

+ Details

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- Definition

Derivative Instruments And Hedging Activities Disclosure [Abstract]

+ Details

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- Definition

Fuel Derivative Contract Non-Monetary Notional Amount

+ Details

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- Definition

Increase Decrease In Fuel Expense

+ Details

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- Definition

The effective portion of losses on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 205G

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 44C
-Subparagraph b
-Clause 2

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- Definition

Fair value as of the balance sheet date of all price risk derivatives designated as fair value hedging instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 17

+ Details

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