CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Statement of Cash Flows [Abstract]
Net income	$ 1.5	$ 167.0	$ 188.5
Adjustments to reconcile net income to net cash provided from operating activities:
Depreciation and amortization	123.9	121.5	116.6
Goodwill impairment charge	34.6	0.0	0.0
Non-cash inventory write-downs from restructuring	29.3	0.0	0.0
Non-cash restructuring and asset impairment charges	56.4	0.0	0.0
Deferred income taxes	(0.4)	16.5	(61.1)
Net pension expense	15.3	11.6	14.2
Share-based compensation expense	10.9	17.6	17.6
Net loss on disposal of property, plant, and equipment and assets held for sale	0.2	1.2	2.5
Gain on insurance recovery	0.0	(11.4)	0.0
Changes in working capital and other:
Accounts receivable	90.3	(5.3)	(86.8)
Inventories	31.3	(94.0)	0.4
Other current assets	(20.5)	6.8	(9.6)
Accounts payable	(109.9)	20.1	10.7
Accrued liabilities	(18.1)	(4.9)	28.7
Pension plan contributions	(6.5)	(5.5)	(6.7)
Other postretirement plan contributions	(3.5)	(3.1)	(3.4)
Other, net	(3.0)	(5.7)	(2.4)
Net cash provided from operating activities	231.8	232.4	209.2
INVESTING ACTIVITIES
Purchases of property, plant, equipment and software	(171.4)	(180.3)	(135.0)
Acquisition of businesses, net of cash acquired	0.0	(79.0)	(13.3)
Proceeds from disposals of property, plant and equipment and assets held for sale	0.2	0.4	1.9
Proceeds from insurance recovery	0.0	11.4	0.0
Proceeds from note receivable from sale of equity method investment	0.0	0.0	6.3
Proceeds from sales and maturities of marketable securities	0.0	2.9	0.7
Net cash used for investing activities	(171.2)	(244.6)	(139.4)
FINANCING ACTIVITIES
Credit agreement borrowings	351.1	163.9	0.0
Credit agreement repayments	(181.1)	(163.9)	0.0
Net change in short-term credit agreement borrowings	(19.7)	19.7	0.0
Dividends paid	(38.8)	(38.6)	(34.4)
Payments on long-term debt	0.0	0.0	(55.0)
Proceeds from stock options exercised	4.3	3.9	12.9
Withholding tax payments on share-based compensation awards	(8.0)	(4.4)	(2.4)
Net cash provided from (used for) financing activities	107.8	(19.4)	(78.9)
Effect of exchange rate changes on cash and cash equivalents	(2.3)	2.4	(1.0)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	166.1	(29.2)	(10.1)
Cash and cash equivalents at beginning of year	27.0	56.2	66.3
Cash and cash equivalents at end of year	$ 193.1	$ 27.0	$ 56.2