Commitments (Details 1) $ in Millions	Aug. 31, 2016 USD ($)
Unrecorded Unconditional Purchase Obligation [Line Items]
2017 (remainder)	$ 1,831
2018	2,230
2019	2,033
2020	2,147
2021	1,615
Thereafter	4,303
Total	14,159
Aircraft And Related Equipment Commitments [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2017 (remainder)	719
2018	1,767
2019	1,717
2020	1,925
2021	1,480
Thereafter	4,191
Total	11,799
Other Commitments [Member]
Unrecorded Unconditional Purchase Obligation [Line Items]
2017 (remainder)	1,112	[1]
2018	463	[1]
2019	316	[1]
2020	222	[1]
2021	135	[1]
Thereafter	112	[1]
Total	$ 2,360	[1]

[1] Primarily equipment, advertising contracts and, for the remainder of 2017, $616 million of estimated required quarterly contributions to our U.S. Pension Plans.