Earnings Per Share (Schedule Of Basic And Diluted Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Earnings Per Share [Abstract]
Net income attributable to common shares	$ 29.9	$ 17.8	$ 21.8	$ 37.8	$ 42.7	$ 47.9	$ 39.4	$ 24.9	$ 107.3	$ 154.9	$ 147.8
Weighted average number of shares outstanding, used in computing basic earnings per share									51.5	53.5	54.9
Dilutive common stock equivalents									0.7	0.7	0.9
Weighted average shares used in computing diluted earnings per share									52.2	54.2	55.8
Basic earnings per share									$ 2.08	$ 2.90	$ 2.69
Diluted earnings per share	$ 0.58	$ 0.35	$ 0.41	$ 0.70	$ 0.80	$ 0.89	$ 0.73	$ 0.45	$ 2.06	$ 2.86	$ 2.65
Anti-dilutive options and restricted stock (excluded from the calculation of diluted earnings per share)									0.7	0.7	0.8