Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Feb. 28, 2018	Feb. 28, 2017
Cash flows provided from (used in) operating activities:
Net income	$ 3.6	$ 35.3
Loss from discontinued operations	52.0	0.4
Income from continuing operations	55.6	35.7
Adjustments to reconcile net income to net cash provided from (used in) operating activities:
Depreciation and intangible amortization	31.4	26.2
Stock-based compensation	8.7	7.6
Deferred tax benefit	(24.1)	(1.7)
Gain on asset disposal		(2.6)
Changes in certain assets and liabilities:
Accounts receivable	35.2	(26.7)
Inventories	(36.7)	(15.6)
Rotable spares and equipment on or available for short-term lease	2.5	(8.3)
Rotable assets supporting long-term programs	(35.7)	(75.7)
Accounts and trade notes payable	8.5	38.2
Accrued and other liabilities	(12.0)	(10.3)
Other	(17.8)	(4.6)
Net cash provided from (used in) operating activities - continuing operations	15.6	(37.8)
Net cash provided from operating activities - discontinued operations	17.3	26.6
Net cash provided from (used in) operating activities	32.9	(11.2)
Cash flows used in investing activities:
Property, plant and equipment expenditures	(18.4)	(20.1)
Payments for acquisitions	(22.9)
Proceeds from aircraft joint ventures	7.3
Proceeds from asset disposals	1.3	5.9
Other	0.4	(2.8)
Net cash used in investing activities - continuing operations	(32.3)	(17.0)
Net cash provided from (used in) investing activities -- discontinued operations	(4.7)	4.2
Net cash used in investing activities	(37.0)	(12.8)
Cash flows provided from financing activities:
Short-term borrowings, net	16.0	34.0
Reduction in long-term borrowings		(10.0)
Proceeds from long-term borrowings	24.8
Cash dividends	(7.7)	(7.7)
Purchase of treasury stock	(13.1)	(16.6)
Stock option exercises	10.0	5.3
Other	(0.3)	(0.4)
Net cash provided from financing activities - continuing operations	29.7	4.6
Net cash used in financing activities - discontinued operations	(1.3)	(1.2)
Net cash provided from financing activities	28.4	3.4
Effect of exchange rate changes on cash		(0.5)
Increase (Decrease) in cash, cash equivalents, and restricted cash	24.3	(21.1)
Cash, cash equivalents, and restricted cash at beginning of period	10.3	31.2
Cash, cash equivalents, and restricted cash at end of period	$ 34.6	$ 10.1