Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Aug. 31, 2014	Aug. 31, 2013
Cash flows provided from operating activities:
Net income attributable to AAR and noncontrolling interest	$ 14.5	$ 18.0
Adjustments to reconcile net income attributable to AAR and noncontrolling interest to net cash provided from operating activities:
Depreciation and amortization	17.1	19.3
Amortization of stock-based compensation	2.0	1.6
Amortization of debt discount	0.7	1.5
Amortization of overhaul costs	6.2	8.7
Deferred tax provision	0.8	4.1
Earnings from joint ventures	(0.6)	(1.2)
Changes in certain assets and liabilities:
Accounts receivable	(13.4)	12.0
Inventories	(15.1)	(15.3)
Rotable spares and equipment on or available for short-term lease	0.2	6.6
Equipment on or available for long-term lease	(7.0)	(1.9)
Accounts and trade notes payable	26.2	(1.4)
Accrued and other liabilities	(18.1)	(29.0)
Other, primarily program and overhaul costs	1.5	4.5
Net cash provided from operating activities	15.0	27.5
Cash flows from investing activities:
Property, plant and equipment expenditures	(9.0)	(7.2)
Other	(1.1)	(0.1)
Net cash used in investing activities	(10.1)	(7.3)
Cash flows from financing activities:
Reduction in borrowings	(7.3)	(7.7)
Reduction in capital lease obligations	(1.5)
Cash dividends	(3.6)	(3.0)
Stock option exercises	0.2	5.2
Tax benefits from exercise of stock options	0.6	0.8
Net cash used in financing activities	(11.6)	(4.7)
Effect of exchange rate changes on cash	(0.7)	0.1
(Decrease) Increase in cash and cash equivalents	(7.4)	15.6
Cash and cash equivalents, beginning of period	89.2	75.3
Cash and cash equivalents, end of period	$ 81.8	$ 90.9