Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Nov. 30, 2015	Nov. 30, 2014
Cash flows provided from (used in) operating activities:
Net income attributable to AAR and noncontrolling interest	$ 30.9	$ 29.7
Less: Income from discontinued operations	(12.3)	(4.0)
Income from continuing operations attributable to AAR	18.6	25.7
Adjustments to reconcile net income to net cash provided from (used in) operating activities:
Depreciation and intangible amortization	25.0	27.3
Amortization of stock-based compensation	3.9	4.1
Amortization of debt discount	1.0	1.4
Amortization of overhaul costs	9.9	10.2
Deferred tax provision (benefit)	(2.0)	9.3
Loss on extinguishment of debt	0.4
Loss (Earnings) from joint ventures	0.4	(1.2)
Changes in certain assets and liabilities:
Accounts receivable	(25.0)	(30.0)
Inventories	(25.5)	(31.1)
Rotable spares and equipment on or available for short-term lease	(4.9)	(2.4)
Equipment on or available for long-term lease	(5.1)	(13.4)
Accounts and trade notes payable	12.1	38.5
Accrued and other liabilities	(15.9)	(0.6)
Other, primarily program and overhaul costs	(10.6)	4.5
Net cash provided from (used in) operating activities - continuing operations	(17.7)	42.3
Net cash provided from (used in) operating activities -discontinued operations	1.8	(11.3)
Net cash provided from (used in) operating activities	(15.9)	31.0
Cash flows provided from (used in) investing activities:
Property, plant and equipment expenditures	(30.6)	(14.5)
Proceeds from sale-leaseback	19.2
Payments for acquisitions		(1.0)
Proceeds from asset disposals	6.5	1.2
Investment in aircraft joint ventures	(1.4)
Proceeds from aircraft joint ventures	2.5
Other	(0.1)	(0.5)
Net cash used in investing activities - continuing operations	(3.9)	(14.8)
Net cash provided from (used in) investing activities - discontinued operations	27.1	(2.5)
Net cash provided from (used in) investing activities	23.2	(17.3)
Cash flows provided from (used in) financing activities:
Short-term borrowings (repayments), net	55.0	40.0
Reduction in long-term borrowings	(39.9)	(39.5)
Reduction in capital lease obligations		(1.5)
Cash dividends	(5.2)	(6.0)
Purchase of treasury stock	(10.1)	(1.7)
Stock option exercises	1.5	0.3
Other	(0.4)	0.4
Net cash provided from (used in) financing activities -continuing operations	0.9	(8.0)
Net cash used in financing activities - discontinued operations		(0.6)
Net cash provided from (used in) financing activities	0.9	(8.6)
Effect of exchange rate changes on cash	(0.1)	(1.7)
Increase in cash and cash equivalents	8.1	3.4
Cash and cash equivalents, beginning of period	54.7	89.2
Cash and cash equivalents, end of period	$ 62.8	$ 92.6