Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Feb. 28, 2017	Feb. 29, 2016
Cash flows provided from (used in) operating activities:
Net income	$ 35.3	$ 35.7
Less: (Income) Loss from discontinued operations	(0.2)	(9.2)
Income from continuing operations	35.1	26.5
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and intangible amortization	39.0	37.8
Amortization of stock-based compensation	7.6	6.2
Amortization of overhaul costs	14.5	16.3
Deferred tax provision (benefit)	(1.7)	7.5
Gain on sale of product line	(2.6)
Changes in certain assets and liabilities:
Accounts receivable	(17.8)	(24.0)
Inventories	(12.0)	(38.5)
Rotable spares and equipment on or available for short-term lease	(4.9)	(8.3)
Equipment on or available for long-term lease	(75.7)	(7.7)
Accounts and trade notes payable	31.8	19.8
Accrued and other liabilities	(13.3)	(32.9)
Other, primarily program and overhaul costs	(9.6)	(15.5)
Net cash used in operating activities - continuing operations	(9.6)	(12.8)
Net cash used in operating activities -discontinued operations	(1.6)	(1.1)
Net cash used in operating activities	(11.2)	(13.9)
Cash flows provided from (used in) investing activities:
Property, plant and equipment expenditures	(28.0)	(74.6)
Proceeds from asset disposals	18.0	6.5
Proceeds from sale-leaseback		38.5
Payments for acquisition		(4.8)
Other	(2.8)	1.1
Net cash used in investing activities - continuing operations	(12.8)	(33.3)
Net cash provided from investing activities - discontinued operations		27.3
Net cash provided from (used in) investing activities	(12.8)	(6.0)
Cash flows provided from (used in) financing activities:
Short-term borrowings (repayments), net	34.0	85.0
Reduction in long-term borrowings	(10.0)	(44.9)
Cash dividends	(7.7)	(7.8)
Purchase of treasury stock	(16.6)	(17.4)
Stock option exercises	5.3	1.5
Other	(1.6)	(0.4)
Net cash provided from (used in) financing activities - continuing operations	3.4	16.0
Effect of exchange rate changes on cash	(0.5)	(0.4)
Increase (Decrease) in cash and cash equivalents	(21.1)	(4.3)
Cash and cash equivalents, beginning of period	31.2	54.7
Cash and cash equivalents, end of period	$ 10.1	$ 50.4