CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Statement of Cash Flows [Abstract]
Net (loss) income	$ (49.1)	$ (229.6)	$ 1.5
Adjustments to reconcile net (loss) income to net cash provided from operating activities:
Depreciation and amortization	131.4	123.6	123.9
LIFO decrement	0.0	52.2	1.8
Goodwill impairment charge	0.0	52.8	34.6
Non-cash inventory write-downs from restructuring	0.0	4.2	29.3
Acquisition-related contingent liability release	(4.7)	0.0	0.0
Non-cash restructuring and asset impairment charges	0.0	16.2	56.4
Debt extinguishment losses, net	6.0	8.2	0.0
Deferred income taxes	(3.1)	(33.6)	(0.4)
Net pension (income) expense	(7.3)	24.6	15.3
Share-based compensation expense	10.8	10.4	10.9
Net loss on disposal of property, plant, and equipment and assets held for sale	2.0	0.3	0.2
Changes in working capital and other:
Accounts receivable	(79.0)	(14.9)	90.3
Inventories	(71.9)	238.5	29.5
Other current assets	8.3	(33.9)	(20.5)
Accounts payable	95.7	22.4	(109.9)
Accrued liabilities	(24.5)	33.8	(18.1)
Pension plan contributions	(0.7)	(19.9)	(6.5)
Other postretirement plan contributions	(1.7)	(2.7)	(3.5)
Other, net	(6.2)	(2.6)	(3.0)
Net cash provided from operating activities	6.0	250.0	231.8
INVESTING ACTIVITIES
Purchases of property, plant, equipment and software	(91.3)	(100.5)	(171.4)
Proceeds from disposals of property, plant and equipment and assets held for sale	2.2	1.6	0.2
Proceeds from divestiture of business	0.0	20.0	0.0
Net cash used for investing activities	(89.1)	(78.9)	(171.2)
FINANCING ACTIVITIES
Credit agreement borrowings	0.0	0.0	351.1
Credit agreement repayments	0.0	0.0	(181.1)
Net change in short-term credit agreement borrowings	0.0	(170.0)	(19.7)
Proceeds from issuance of long-term debt, net of offering costs	296.6	395.5	0.0
Payments on long-term debt	(300.0)	(250.0)	0.0
Payments for debt extinguishment costs, net	(6.0)	(8.2)	0.0
Payments for debt issue costs	(0.8)	(2.5)	0.0
Dividends paid	(39.2)	(39.1)	(38.8)
Proceeds from stock options exercised	0.0	0.5	4.3
Withholding tax payments on share-based compensation awards	(3.4)	(2.3)	(8.0)
Net cash (used for) provided from financing activities	(52.8)	(76.1)	107.8
Effect of exchange rate changes on cash and cash equivalents	2.7	(0.7)	(2.3)
(DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(133.2)	94.3	166.1
Cash and cash equivalents at beginning of year	287.4	193.1	27.0
Cash and cash equivalents at end of year	$ 154.2	$ 287.4	$ 193.1