Condensed Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Feb. 29, 2016	Feb. 28, 2015	Feb. 29, 2016	Feb. 28, 2015
Sales:
Sales from products	$ 220.1	$ 213.9	$ 661.2	$ 656.9
Sales from services	182.7	166.2	543.2	521.6
Total sales	402.8	380.1	1,204.4	1,178.5
Costs and operating expenses:
Cost of products	183.0	184.5	553.8	568.6
Cost of services	161.5	145.5	477.9	430.2
Selling, general and administrative	42.6	41.7	124.5	120.3
Total costs and operating expenses	387.1	371.7	1,156.2	1,119.1
Earnings (Loss) from joint ventures		0.6	(0.4)	1.8
Operating income	15.7	9.0	47.8	61.2
Loss on extinguishment of debt			(0.4)
Interest expense	(1.7)	(6.4)	(5.2)	(19.4)
Interest income	0.1		0.2	0.2
Income from continuing operations before provision for income taxes	14.1	2.6	42.4	42.0
Provision for income taxes	3.4	0.7	13.1	14.4
Income from continuing operations attributable to AAR	10.7	1.9	29.3	27.6
Discontinued operations:
Operating income (loss)	(0.8)	(0.5)	(9.3)	4.1
Gain from contingent consideration			27.7
Impairment charge		(46.4)		(46.4)
Provision for income taxes (benefit)	5.1	(10.6)	12.0	(10.0)
Income (Loss) from discontinued operations	(5.9)	(36.3)	6.4	(32.3)
Income attributable to noncontrolling interest from discontinued operations		(0.1)		(0.2)
Income (Loss) from discontinued operations attributable to AAR	(5.9)	(36.4)	6.4	(32.5)
Net income attributable to AAR	$ 4.8	$ (34.5)	$ 35.7	$ (4.9)
Earnings (Loss) per share - basic:
Earnings from continuing operations	$ 0.31	$ 0.05	$ 0.84	$ 0.70
Earnings (Loss) from discontinued operations	(0.17)	(0.94)	0.19	(0.84)
Earnings (Loss) per share - basic	0.14	(0.89)	1.03	(0.14)
Earnings (Loss) per share - diluted:
Earnings from continuing operations	0.31	0.05	0.84	0.69
Earnings (Loss) from discontinued operations	(0.17)	(0.94)	0.19	(0.84)
Earnings (Loss) per share-diluted	$ 0.14	$ (0.89)	$ 1.03	$ (0.15)