CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (Unaudited) - USD ($) $ in Millions	Total	Common Stock	Capital in Excess of Par Value	Reinvested Earnings	Common Stock in Treasury	Accumulated Other Comprehensive (Loss) Income
Balances, period start at Jun. 30, 2017	$ 1,198.6	$ 276.7	$ 284.8	$ 1,321.8	$ (341.6)	$ (343.1)
Increase (Decrease) in Stockholders' Equity
Net income	23.4			23.4
Pension and postretirement benefits gain, net of tax	2.1					2.1
Marketable securities gain, net of tax	0.0
Net (loss) gain on derivative instruments, net of tax	8.1					8.1
Foreign currency translation	1.8					1.8
Cash Dividends:
Common	(8.6)			(8.6)
Share-based compensation plans	4.2		4.0		0.2
Stock options exercised	1.4	0.3	1.1
Balances, period end at Sep. 30, 2017	1,231.0	277.0	289.9	1,336.6	(341.4)	(331.1)
Increase (Decrease) in Stockholders' Equity
Cumulative adjustment upon adoption of ASU 2017-12	0.0			1.0		(1.0)
Balances, period start at Jun. 30, 2018	1,485.9	278.6	310.0	1,475.9	(338.8)	(239.8)
Increase (Decrease) in Stockholders' Equity
Net income	31.5			31.5
Pension and postretirement benefits gain, net of tax	1.7					1.7
Marketable securities gain, net of tax	0.3					0.3
Net (loss) gain on derivative instruments, net of tax	(23.0)					(23.0)
Foreign currency translation	0.7					0.7
Cash Dividends:
Common	(9.6)			(9.6)
Share-based compensation plans	0.0		(2.9)		2.9
Stock options exercised	3.2	0.3	2.9
Balances, period end at Sep. 30, 2018	$ 1,490.7	$ 278.9	$ 310.0	$ 1,498.8	$ (335.9)	$ (261.1)