CONSOLIDATED STATEMENTS OF INCOME - USD ($)	12 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2013
Sales:
Sales from products	$ 891,400,000	$ 901,300,000	$ 900,600,000
Sales from services	702,900,000	807,800,000	907,300,000
Total sales	1,594,300,000	1,709,100,000	1,807,900,000
Costs and operating expenses:
Cost of products	836,500,000	794,000,000	840,900,000
Cost of services	598,500,000	626,200,000	707,500,000
Selling, general and administrative	171,400,000	166,300,000	164,000,000
Total costs and operating expenses	1,606,400,000	1,586,500,000	1,712,400,000
Earnings from joint ventures	200,000	3,000,000	6,700,000
Operating income (loss)	(11,900,000)	125,600,000	102,200,000
Loss on extinguishment of debt	(44,900,000)		(300,000)
Interest expense	(26,500,000)	(28,300,000)	(29,100,000)
Interest income	300,000	1,500,000	1,400,000
Income (Loss) from continuing operations before provision for income taxes	(83,000,000)	98,800,000	74,200,000
Provision for income tax (benefit)	(28,500,000)	31,600,000	25,400,000
Income (Loss) from continuing operations attributable to AAR	(54,500,000)	67,200,000	48,800,000
Discontinued operations.
Operating income (loss)	(1,500,000)	6,500,000	8,100,000
Gain on disposal	198,600,000
Impairment charges	(57,500,000)
Provision for income taxes	74,700,000	500,000	1,400,000
Income from discontinued operations	64,900,000	6,000,000	6,700,000
Income attributable to noncontrolling interest from discontinued operations	(200,000)	(300,000)	(500,000)
Income from discontinued operations attributable to AAR	64,700,000	5,700,000	6,200,000
Net income attributable to AAR	$ 10,200,000	$ 72,900,000	$ 55,000,000
Earnings (Loss) per share - basic:
Earnings (Loss) from continuing operations	$ (1.40)	$ 1.70	$ 1.23
Earnings from discontinued operations	1.66	0.15	0.15
Earnings per share - basic	0.26	1.85	1.38
Earnings per share - diluted:
Earnings (Loss) from continuing operations	(1.40)	1.68	1.23
Earnings from discontinued operations	1.64	0.15	0.15
Earnings per share-diluted	$ 0.24	$ 1.83	$ 1.38