Condensed Consolidated Statements of Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Feb. 28, 2014	Feb. 28, 2013	Feb. 28, 2014	Feb. 28, 2013
Sales:
Sales from products	$ 279.8	$ 289.7	$ 914.2	$ 909.0
Sales from services	194.6	230.5	615.4	674.5
Total sales	474.4	520.2	1,529.6	1,583.5
Cost and operating expenses:
Cost of products	241.8	262.3	796.8	801.8
Cost of services	153.9	181.7	478.4	527.8
Selling, general and administrative	45.6	41.8	144.4	145.9
Total costs and operating expenses	441.3	485.8	1,419.6	1,475.5
Earnings from joint ventures	0.6	3.2	2.6	5.8
Operating income	33.7	37.6	112.6	113.8
Loss on extinguishment of debt				(0.3)
Interest expense	(10.7)	(10.2)	(32.2)	(31.6)
Interest income	0.3	0.4	0.9	1.1
Income before provision for income taxes	23.3	27.8	81.3	83.0
Provision for income taxes	5.3	9.3	25.3	28.3
Net income attributable to AAR and noncontrolling interest	18.0	18.5	56.0	54.7
Income attributable to noncontrolling interest	(0.1)	(0.1)	(0.2)	(0.3)
Net income attributable to AAR	$ 17.9	$ 18.4	$ 55.8	$ 54.4
Earnings per share - basic (in dollars per share)	$ 0.45	$ 0.47	$ 1.41	$ 1.37
Earnings per share - diluted (in dollars per share)	$ 0.45	$ 0.46	$ 1.40	$ 1.35