Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Common Stock - $1 par value	Class B Stock - $1 par value	Series A Preferred Stock	Common Stock - $1 par value Common Stock - $1 par value	Common Stock - $1 par value Class B Stock - $1 par value	Additional Paid-in Capital	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings Common Stock - $1 par value	Retained Earnings Class B Stock - $1 par value	Retained Earnings Series A Preferred Stock	Accumulated Other Comprehensive Loss
Beginning balance at Jun. 30, 2018	$ 1,097.5	$ 2.4				$ 39.8	$ 5.1	$ 199.5	$ 889.8	$ 2.4				$ (36.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	46.3								46.3
Other comprehensive income (loss), net of taxes	(9.6)													(9.6)
Shares issued under various incentive plans, net of forfeitures	4.6					0.5		4.1
Purchases of Company stock	(10.0)					(0.2)		(9.8)
Share-based compensation	22.9							22.9
Dividends paid			$ (94.6)	$ (11.4)	$ (55.9)						$ (94.6)	$ (11.4)	$ (55.9)
Accretion of Series A preferred stock	$ (17.6)								(17.6)
Accounting Standards Update [Extensible Enumeration]	us-gaap:AccountingStandardsUpdate201602Member
Ending balance at Jun. 30, 2019	$ 974.6	(5.8)				40.1	5.1	216.7	759.0	(5.8)				(46.3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	(234.3)								(234.3)
Other comprehensive income (loss), net of taxes	(36.1)													(36.1)
Shares issued under various incentive plans, net of forfeitures	1.9					0.3		1.6
Purchases of Company stock	(4.7)					(0.1)		(4.6)
Share-based compensation	13.9							13.9
Dividends paid			$ (74.1)	$ (8.9)	$ (56.5)						$ (74.1)	$ (8.9)	$ (56.5)
Accretion of Series A preferred stock	(18.2)								(18.2)
Redemption of Series A preferred stock	$ (163.6)								(163.6)
Accounting Standards Update [Extensible Enumeration]	us-gaap:AccountingStandardsUpdate201613Member
Ending balance at Jun. 30, 2020	$ 388.2	$ 2.1				40.3	5.1	227.6	197.6	$ 2.1				(82.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings (loss)	306.6								306.6
Other comprehensive income (loss), net of taxes	4.0													4.0
Shares issued under various incentive plans, net of forfeitures	3.6					0.4		3.2
Purchases of Company stock	(2.9)					(0.1)		(2.8)
Share-based compensation	17.5							17.5
Redemption of warrants	(67.0)							(67.0)
Ending balance at Jun. 30, 2021	$ 652.1					$ 40.6	$ 5.1	$ 178.5	$ 506.3					$ (78.4)