Commitments (Details 1) (USD $) In Millions, unless otherwise specified	May 31, 2013
Schedule of Purchase Commitments [Line Items]
2014	$ 2,151
2015	1,238
2016	1,263
2017	1,060
2018	1,426
Thereafter	4,601
Total	11,739
Aircraft And Related Equipment Commitments [Member]
Schedule of Purchase Commitments [Line Items]
2014	968
2015	1,054
2016	1,140
2017	959
2018	1,382
Thereafter	4,492
Total	9,995
Facilities And Other Commitments [Member]
Schedule of Purchase Commitments [Line Items]
2014	1,183	[1]
2015	184	[1]
2016	123	[1]
2017	101	[1]
2018	44	[1]
Thereafter	109	[1]
Total	$ 1,744	[1]

[1] Primarily vehicles, facilities, advertising contracts and in 2014, approximately $650 million of quarterly contributions to our U.S. Pension Plans.