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Commitments (Details 1)
$ in Millions
Feb. 29, 2016
USD ($)
Unrecorded Unconditional Purchase Obligation [Line Items]  
2016 (remainder) $ 245
2017 1,574
2018 1,921
2019 1,647
2020 1,659
Thereafter 5,881
Total 12,927
Aircraft And Related Equipment Commitments [Member]  
Unrecorded Unconditional Purchase Obligation [Line Items]  
2016 (remainder) 94
2017 1,283
2018 1,748
2019 1,569
2020 1,633
Thereafter 5,779
Total 12,106
Other Commitments [Member]  
Unrecorded Unconditional Purchase Obligation [Line Items]  
2016 (remainder) 151 [1]
2017 291 [1]
2018 173 [1]
2019 78 [1]
2020 26 [1]
Thereafter 102 [1]
Total $ 821 [1]
[1] Primarily equipment and advertising contracts.