Condensed Consolidated Statements of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Aug. 31, 2012	Aug. 31, 2011
Sales:
Sales from products	$ 327.5	$ 331.4
Sales from services	223.0	154.1
Total sales	550.5	485.5
Cost and operating expenses:
Cost of products	284.1	290.4
Cost of services	176.1	119.4
Selling, general and administrative	53.3	43.1
Total costs and operating expenses	513.5	452.9
Earnings from joint ventures	1.4	0.2
Operating income	38.4	32.8
(Loss) on extinguishment of debt	(0.2)
Interest expense	(10.6)	(7.5)
Interest income	0.4	0.1
Income before provision for income taxes	28.0	25.4
Provision for income taxes	9.7	8.8
Net income attributable to AAR and noncontrolling interest	18.3	16.6
(Income) loss attributable to noncontrolling interest	(0.1)
Net income attributable to AAR	$ 18.2	$ 16.6
Earnings per share - basic (in dollars per share)	$ 0.46	$ 0.41
Earnings per share - diluted (in dollars per share)	$ 0.45	$ 0.41