CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY - USD ($) $ in Millions	Total	Common Stock, Par Value of $5	Common Stock, Capital in Excess of Par Value	Reinvested Earnings	Common Stock in Treasury	Accumulated Other Comprehensive (Loss) Income
Balances at the beginning of the period at Jun. 30, 2021	$ 1,392.3	$ 280.1	$ 322.6	$ 1,299.3	$ (317.4)	$ (192.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(44.1)			(44.1)
Pension and postretirement benefits, net of tax	1.9					1.9
Net gain on derivative instruments, net of tax	2.8					2.8
Foreign currency translation	(2.8)					(2.8)
Share-based compensation plans	2.7		(6.7)		9.4
Balances at the end of the period at Dec. 31, 2021	1,333.1	280.1	315.9	1,235.5	(308.0)	(190.4)
Cash Dividends:
Common stock	(19.7)			(19.7)
Balances at the beginning of the period at Sep. 30, 2021	1,367.6	280.1	316.3	1,274.7	(311.3)	(192.2)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(29.4)			(29.4)
Pension and postretirement benefits, net of tax	0.8					0.8
Net gain on derivative instruments, net of tax	1.7					1.7
Foreign currency translation	(0.7)					(0.7)
Share-based compensation plans	2.9		(0.4)		3.3
Balances at the end of the period at Dec. 31, 2021	1,333.1	280.1	315.9	1,235.5	(308.0)	(190.4)
Cash Dividends:
Common stock	(9.8)			(9.8)
Balances at the beginning of the period at Jun. 30, 2022	1,330.5	280.1	320.3	1,211.0	(307.4)	(173.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(0.6)			(0.6)
Pension and postretirement benefits, net of tax	2.1					2.1
Net gain on derivative instruments, net of tax	1.2					1.2
Foreign currency translation	3.6					3.6
Share-based compensation plans	4.0		(5.0)		9.0
Balances at the end of the period at Dec. 31, 2022	1,321.1	280.1	315.3	1,190.7	(298.4)	(166.6)
Cash Dividends:
Common stock	(19.7)			(19.7)
Balances at the beginning of the period at Sep. 30, 2022	1,306.8	280.1	314.3	1,194.3	(300.8)	(181.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	6.2			6.2
Pension and postretirement benefits, net of tax	1.1					1.1
Net gain on derivative instruments, net of tax	6.5					6.5
Foreign currency translation	6.9					6.9
Share-based compensation plans	3.4		1.0		2.4
Balances at the end of the period at Dec. 31, 2022	1,321.1	$ 280.1	$ 315.3	1,190.7	$ (298.4)	$ (166.6)
Cash Dividends:
Common stock	$ (9.8)			$ (9.8)