Commitments (Details 3) (USD $) In Millions, unless otherwise specified	Aug. 31, 2013
Schedule of Future Minimum Operating Lease Payments [Line Items]
2014 (remainder)	$ 973
2015	1,163
2016	1,032
2017	1,153
2018	780
Thereafter	4,769
Total	9,870
Aircraft and Related Equipment [Member]
Schedule of Future Minimum Operating Lease Payments [Line Items]
2014 (remainder)	416
2015	448
2016	453
2017	391
2018	326
Thereafter	824
Total	2,858
Facilities and Other [Member]
Schedule of Future Minimum Operating Lease Payments [Line Items]
2014 (remainder)	557
2015	715
2016	579
2017	762
2018	454
Thereafter	3,945
Total	$ 7,012