CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2013
Cash flows provided from operating activities:
Net income attributable to AAR and noncontrolling interest	$ 10.4	$ 73.2	$ 55.5
Adjustments to reconcile net income attributable to AAR and noncontrolling interest to net cash provided from operating activities:
Depreciation and intangible amortization	69.1	80.4	79.7
Impairment Charges	84.6
Amortization of program development costs	31.6	6.3
Amortization of stock-based compensation	7.8	8.7	11.1
Amortization of debt discount	2.7	5.3	9.6
Amortization of overhaul costs	23.2	33.0	28.9
Deferred tax provision (benefit)	(79.8)	9.6	29.5
Gain on sale of business	(198.6)
Loss on extinguishment of debt	44.9		0.3
Earnings from joint ventures	(0.4)	(3.1)	(6.8)
Changes in certain assets and liabilities:
Accounts receivable	(28.3)	16.7	6.0
Inventories	(43.2)	(47.9)	16.1
Rotable spares and equipment on or available for short-term lease	6.6	11.3	10.4
Equipment on or available for long-term lease	6.2	(41.7)	0.8
Accounts and trade notes payable	(4.0)	20.1	(50.7)
Accrued and other liabilities	28.1	4.3	11.8
Other, primarily program and overhaul costs	(3.9)	(36.4)	(39.3)
Net cash provided from (used in) operating activities	(43.0)	139.8	162.9
Cash flows used in investing activities:
Property, plant and equipment expenditures	(46.3)	(26.5)	(37.6)
Proceeds from sale of assets	6.6	2.0	11.8
Proceeds from sale of business	686.1
Proceeds from sale-leaseback advance	40.3
Payments for acquisitions	(1.0)	(15.3)	(21.3)
Proceeds from aircraft joint ventures	4.0	(0.2)	15.4
Other	(0.5)	(0.9)	(1.1)
Net cash provided by (used in) investing activities	689.2	(40.9)	(32.8)
Cash flows (used in) provided from financing activities:
Short-term borrowings (repayments), net	(80.0)	10.0	(160.0)
Proceeds from borrowings			181.8
Reduction in long-term borrowings	(394.8)	(88.9)	(114.3)
Cash dividends	(12.5)	(11.8)	(12.8)
Premium paid on early retirement of debt	(45.6)
Purchase of treasury stock	(151.5)	(1.0)	(14.6)
Stock option exercises	6.5	5.1	1.1
Other	(0.2)	0.7	(4.9)
Net cash used in financing activities	(678.1)	(85.9)	(123.7)
Effect of exchange rate changes on cash	(2.6)	0.9	1.2
Increase (Decrease) in cash and cash equivalents	(34.5)	13.9	7.6
Cash and cash equivalents, beginning of year	89.2	75.3	67.7
Cash and cash equivalents, end of year	$ 54.7	$ 89.2	$ 75.3