Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Feb. 29, 2016	Feb. 28, 2015
Cash flows provided from (used in) operating activities:
Net income (loss) attributable to AAR and noncontrolling interest	$ 35.7	$ (4.7)
Less: Loss (Income) from discontinued operations	(6.4)	32.3
Income from continuing operations attributable to AAR	29.3	27.6
Adjustments to reconcile net income to net cash provided from (used in) operating activities:
Depreciation and intangible amortization	37.0	41.4
Impairment Charges		4.7
Amortization of stock-based compensation	6.2	6.5
Amortization of debt discount	1.3	2.0
Amortization of overhaul costs	16.3	14.7
Deferred tax provision (benefit)	7.5	(7.1)
Loss on extinguishment of debt	0.4
Loss (Earnings) from joint ventures	0.4	(1.7)
Changes in certain assets and liabilities:
Accounts receivable	(24.1)	(25.2)
Inventories	(40.4)	(58.3)
Rotable spares and equipment on or available for short-term lease	(8.3)	(4.6)
Equipment on or available for long-term lease	(7.7)	(21.3)
Accounts and trade notes payable	20.5	26.5
Accrued and other liabilities	(34.4)	6.4
Other, primarily program and overhaul costs	(18.1)	(7.2)
Net cash provided from (used in) operating activities - continuing operations	(14.1)	4.4
Net cash provided from (used in) operating activities -discontinued operations	0.2	4.6
Net cash provided from (used in) operating activities	(13.9)	9.0
Cash flows provided from (used in) investing activities:
Property, plant and equipment expenditures	(74.2)	(19.9)
Proceeds from sale-leaseback	38.5
Payments for acquisitions	(4.8)	(1.0)
Proceeds from asset disposals	6.5	1.2
Other	1.1	(0.5)
Net cash used in investing activities - continuing operations	(32.9)	(20.2)
Net cash provided from used in investing activities - discontinued operations	26.9	(3.7)
Net cash used in investing activities	(6.0)	(23.9)
Cash flows provided from (used in) financing activities:
Short-term borrowings (repayments), net	85.0	55.0
Reduction in long-term borrowings	(44.9)	(46.8)
Cash dividends	(7.8)	(8.9)
Purchase of treasury stock	(17.4)	(1.7)
Other	1.1	(0.3)
Net cash provided from (used in) financing activities -continuing operations	16.0	(2.7)
Net cash used in financing activities - discontinued operations		(0.6)
Net cash provided from (used in) financing activities	16.0	(3.3)
Effect of exchange rate changes on cash	(0.4)	(4.0)
Decrease in cash and cash equivalents	(4.3)	(22.2)
Cash and cash equivalents, beginning of period	54.7	89.2
Cash and cash equivalents, end of period	$ 50.4	$ 67.0