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Commitments (Details 1)
$ in Millions
Aug. 31, 2015
USD ($)
Schedule of Purchase Commitments [Line Items]  
2016 (remainder) $ 1,472
2017 1,504
2018 1,888
2019 1,655
2020 1,661
Thereafter 6,060
Total 14,240
Aircraft And Related Equipment Commitments [Member]  
Schedule of Purchase Commitments [Line Items]  
2016 (remainder) 657
2017 1,240
2018 1,739
2019 1,584
2020 1,638
Thereafter 5,962
Total 12,820
Other Commitments [Member]  
Schedule of Purchase Commitments [Line Items]  
2016 (remainder) [1] 815
2017 [1] 264
2018 [1] 149
2019 [1] 71
2020 [1] 23
Thereafter [1] 98
Total [1] $ 1,420
[1] Primarily equipment, advertising contracts and, for the remainder of 2016, $495 million of estimated required quarterly contributions to our U.S. Pension Plans.