Condensed Consolidated Statements of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Aug. 31, 2013	Aug. 31, 2012
Sales:
Sales from products	$ 305.5	$ 327.5
Sales from services	209.0	223.0
Total sales	514.5	550.5
Cost and operating expenses:
Cost of products	269.0	284.1
Cost of services	160.8	176.1
Selling, general and administrative	47.7	53.3
Total costs and operating expenses	477.5	513.5
Earnings from joint ventures	1.2	1.4
Operating income	38.2	38.4
Loss on extinguishment of debt		(0.2)
Interest expense	(11.0)	(10.6)
Interest income	0.3	0.4
Income before provision for income taxes	27.5	28.0
Provision for income taxes	9.5	9.7
Net income attributable to AAR and noncontrolling interest	18.0	18.3
Income attributable to noncontrolling interest	(0.1)	(0.1)
Net income attributable to AAR	$ 17.9	$ 18.2
Earnings per share - basic (in dollars per share)	$ 0.45	$ 0.46
Earnings per share - diluted (in dollars per share)	$ 0.45	$ 0.45