Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Common stock par value $1 per share	Class B stock $1 par value	Series A Preferred Stock	Common stock par value $1 per share Common stock par value $1 per share	Common stock par value $1 per share Class B stock $1 par value	Additional Paid-in Capital	Retained Earnings	Retained Earnings Common stock par value $1 per share	Retained Earnings Class B stock $1 par value	Retained Earnings Series A Preferred Stock	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Jun. 30, 2015	$ 951.9				$ 37.7	$ 6.9	$ 49.0	$ 870.9				$ (12.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	33.9							33.9
Other comprehensive loss, net of tax	(15.9)											(15.9)
Stock issued under various incentive plans, net of forfeitures	20.9				0.6		20.3
Purchases of Company stock	(31.1)				(0.7)		(30.4)
Share-based compensation	12.8						12.8
Conversion of class B to common stock	0.0				1.7	(1.7)
Dividends paid		$ (72.9)	$ (13.2)						$ (72.9)	$ (13.2)
Tax benefit from incentive plans	2.6						2.6
Ending balance at Jun. 30, 2016	889.0				39.3	5.2	54.3	818.7				(28.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	188.9							188.9
Other comprehensive loss, net of tax	9.5											9.5
Stock issued under various incentive plans, net of forfeitures	38.0				0.9		37.1
Purchases of Company stock	(53.3)				(0.9)		(52.4)
Share-based compensation	12.8						12.8
Conversion of class B to common stock	0.0				0.1	(0.1)
Dividends paid		(81.4)	(10.5)						(81.4)	(10.5)
Tax benefit from incentive plans	3.0						3.0
Ending balance at Jun. 30, 2017	996.0				39.4	5.1	54.8	915.7				(19.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	99.4							99.4
Other comprehensive loss, net of tax	(13.7)											(13.7)
Stock issued under various incentive plans, net of forfeitures	19.3				0.9		18.4
Issuance of replacement Time share-based compensation awards	9.8						9.8
Purchases of Company stock	(31.1)				(0.5)		(30.6)
Share-based compensation	30.4						30.4
Issuance of warrants and options	115.6						115.6
Dividends paid		$ (87.8)	$ (10.8)	$ (22.9)					$ (87.8)	$ (10.8)	$ (22.9)
Accretion of Series A preferred stock				$ 7.2							$ 7.2
Reclassification adjustment for adoption of Accounting Standards Update 2018-02	0.0							4.0				(4.0)
Ending balance at Jun. 30, 2018	1,097.5				$ 39.8	$ 5.1	199.5	889.8				$ (36.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect adjustment for adoption of Accounting Standards Update 2016-09	$ 0.5						$ 1.1	$ (0.6)