Condensed Consolidated Statements of Income (USD $) In Millions, except Per Share data	3 Months Ended
	Aug. 31, 2011	Aug. 31, 2010
Condensed Consolidated Statements of Income
REVENUES	$ 10,521	$ 9,457
OPERATING EXPENSES:
Salaries and employee benefits	4,004	3,803
Purchased transportation	1,518	1,327
Rentals and landing fees	620	601
Depreciation and amortization	509	479
Fuel	1,244	887
Maintenance and repairs	551	517
Other	1,338	1,215
OPERATING EXPENSES	9,784	8,829
OPERATING INCOME	737	628
OTHER INCOME (EXPENSE):
Interest, net	(11)	(18)
Other, net	(2)	(7)
OTHER INCOME (EXPENSE)	(13)	(25)
INCOME BEFORE INCOME TAXES	724	603
PROVISION FOR INCOME TAXES	260	223
NET INCOME	$ 464	$ 380
EARNINGS PER COMMON SHARE:
Basic	$ 1.46	$ 1.21
Diluted	$ 1.46	$ 1.20
DIVIDENDS DECLARED PER COMMON SHARE	$ 0.26	$ 0.24