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Commitments (Details 1) (USD $)
In Millions
Aug. 31, 2011
Schedule of Purchase Commitments [Line Items]  
2012 (remainder) $ 1,713
2013 1,283
2014 836
2015 586
2016 595
Thereafter 1,596
Aircraft And Related Equipment Commitments [Member]
 
Schedule of Purchase Commitments [Line Items]  
2012 (remainder) 874
2013 1,162
2014 781
2015 555
2016 580
Thereafter 1,464
Other Commitments [Member]
 
Schedule of Purchase Commitments [Line Items]  
2012 (remainder) 839 [1]
2013 121 [1]
2014 55 [1]
2015 31 [1]
2016 15 [1]
Thereafter $ 132 [1]
[1] Primarily vehicles, facilities, advertising and promotions contracts, and for the remainder of 2012, a total of $418 million of quarterly contributions to our U.S. Pension Plans.