Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Aug. 31, 2023	Aug. 31, 2022
Cash flows provided by (used in) operating activities:
Net income (loss)	$ (0.6)	$ 22.7
Less: Income from discontinued operations		(0.4)
Income (Loss) from continuing operations	(0.6)	22.3
Adjustments to reconcile income (loss) from continuing operations to net cash provided by (used in) operating activities:
Depreciation and amortization	8.4	6.8
Stock-based compensation	4.3	4.1
Pension settlement charge	26.7
Loss from joint ventures	0.9	0.6
Provision for credit losses	0.4
Deferred tax benefit	(4.6)
Changes in certain assets and liabilities:
Accounts receivable	(40.5)	(7.7)
Contract assets	(12.3)	(14.2)
Inventories	(39.8)	(26.0)
Prepaid expenses and other current assets	(8.8)	6.6
Rotable assets supporting long-term programs	(1.0)	(3.1)
Accounts payable	64.2	38.4
Accrued and other liabilities	(10.0)	(27.2)
Deferred revenue on long-term programs	(4.3)	6.5
Other	(1.5)	(0.1)
Net cash provided by (used in) operating activities - continuing operations	(18.5)	7.0
Net cash used in operating activities - discontinued operations	(0.2)	(0.2)
Net cash provided by (used in) operating activities	(18.7)	6.8
Cash flows used in investing activities:
Property, plant, and equipment expenditures	(9.1)	(6.7)
Other	(2.5)	(4.0)
Net cash used in investing activities - continuing operations	(11.6)	(10.7)
Cash flows provided by (used in) financing activities:
Short-term borrowings on Revolving Credit Facility, net	35.0	15.0
Purchase of treasury stock		(21.9)
Stock compensation activity	3.7	0.4
Net cash provided by (used in) financing activities - continuing operations	38.7	(6.5)
Effect of exchange rate changes on cash		(0.1)
Increase (Decrease) in cash, cash equivalents, and restricted cash	8.4	(10.5)
Cash, cash equivalents, and restricted cash at beginning of period	81.8	58.9
Cash, cash equivalents, and restricted cash at end of period	$ 90.2	$ 48.4