CONSOLIDATED STATEMENTS OF INCOME (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	May 31, 2013	May 31, 2012	May 31, 2011
Sales:
Sales from products	$ 1,228.5	$ 1,384.2	$ 1,250.1
Sales from services	908.8	680.8	555.0
Total sales	2,137.3	2,065.0	1,805.1
Costs and operating expenses
Cost of products	1,115.5	1,208.6	1,067.2
Cost of services	707.6	534.1	425.5
Cost of sales - restructuring and impairment		3.7	5.3
Selling, general and administrative	198.4	189.4	182.7
Total costs and operating expenses	2,021.5	1,935.8	1,680.7
Gain on sale of product line			5.9
Earnings from joint ventures	6.8	1.5	3.3
Operating income	122.6	130.7	133.6
(Loss) gain on extinguishment of debt	(0.3)	(0.7)	0.1
Interest expense	(41.6)	(37.7)	(30.7)
Interest income	1.5	1.2	0.4
Income before provision for income taxes	82.2	93.5	103.4
Provision for income taxes	26.7	25.5	33.6
Net income attributable to AAR and noncontrolling interest	55.5	68.0	69.8
Income attributable to noncontrolling interest	(0.5)	(0.3)
Net income attributable to AAR	$ 55.0	$ 67.7	$ 69.8
Earnings per share - basic (in dollars per share)	$ 1.38	$ 1.68	$ 1.76
Earnings per share - diluted (in dollars per share)	$ 1.38	$ 1.65	$ 1.73