Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Debt (Other Debt) (Details)

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Debt (Other Debt) (Details) (USD $)
In Billions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Debt Instrument [Line Items]  
Number of aircraft owned 251
Other Debt [Member]
 
Debt Instrument [Line Items]  
Aggregate principal outstanding other debt $ 1.6
Debt, Maturity 2023
Book value of aircraft pledged as collateral for debt $ 1.7
Number of aircraft owned 51
Number of engines 7
Minimum [Member] | Other Debt [Member]
 
Debt Instrument [Line Items]  
Debt, floating interest rate 0.24%
Debt, fixed interest rate 1.38%
Maximum [Member] | Other Debt [Member]
 
Debt Instrument [Line Items]  
Debt, floating interest rate 5.50%
Debt, fixed interest rate 12.00%