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, 2020	$ 1,445.7	$ 280.1	$ 321.4	$ 1,568.0	$ (325.8)	$ (398.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(172.5)			(172.5)
Pension and postretirement benefits gain, net of tax	105.3					105.3
Net gain on derivative instruments, net of tax	14.9					14.9
Foreign currency translation	10.8					10.8
Cash Dividends:
Common stock	(29.3)			(29.3)
Share-based compensation plans	6.1		(2.2)		8.3
Stock options exercised	0.2		0.2
Balances at the end of the period at Mar. 31, 2021	1,381.2	280.1	319.4	1,366.2	(317.5)	(267.0)
Balances at the beginning of the period at Dec. 31, 2020	1,332.9	280.1	317.0	1,416.5	(317.6)	(363.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(40.5)			(40.5)
Pension and postretirement benefits gain, net of tax	98.1					98.1
Net gain on derivative instruments, net of tax	1.7					1.7
Foreign currency translation	(3.7)					(3.7)
Cash Dividends:
Common stock	(9.8)			(9.8)
Share-based compensation plans	2.3		2.2		0.1
Stock options exercised	0.2		0.2
Balances at the end of the period at Mar. 31, 2021	1,381.2	280.1	319.4	1,366.2	(317.5)	(267.0)
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 loss	(51.7)			(51.7)
Pension and postretirement benefits gain, net of tax	3.0					3.0
Net gain on derivative instruments, net of tax	30.0					30.0
Foreign currency translation	(2.7)					(2.7)
Cash Dividends:
Common stock	(29.4)			(29.4)
Share-based compensation plans	5.6		(4.1)		9.7
Balances at the end of the period at Mar. 31, 2022	1,347.1	280.1	318.5	1,218.2	(307.7)	(162.0)
Balances at the beginning of the period at Dec. 31, 2021	1,333.1	280.1	315.9	1,235.5	(308.0)	(190.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(7.5)			(7.5)
Pension and postretirement benefits gain, net of tax	1.1					1.1
Net gain on derivative instruments, net of tax	27.2					27.2
Foreign currency translation	0.1					0.1
Cash Dividends:
Common stock	(9.8)			(9.8)
Share-based compensation plans	2.9		2.6		0.3
Balances at the end of the period at Mar. 31, 2022	$ 1,347.1	$ 280.1	$ 318.5	$ 1,218.2	$ (307.7)	$ (162.0)