Commitments (Details 1) $ in Millions		May. 31, 2015 USD ($)
Schedule of Purchase Commitments [Line Items]
2016		$ 2,315
2017		1,259
2018		1,527
2019		1,086
2020		684
Thereafter		3,875
Total		10,746
Aircraft And Related Equipment Commitments [Member]
Schedule of Purchase Commitments [Line Items]
2016		1,255
2017		1,024
2018		1,399
2019		1,017
2020		662
Thereafter		3,786
Total		9,143
Other [Member]
Schedule of Purchase Commitments [Line Items]
2016	[1]	1,060
2017	[1]	235
2018	[1]	128
2019	[1]	69
2020	[1]	22
Thereafter	[1]	89
Total	[1]	$ 1,603

[1] Primarily equipment, advertising contracts and in 2016, approximately $500 million of estimated required quarterly contributions to our U.S. Pension Plans.