Equity and Accumulated Other Comprehensive Income (Loss) - Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019
Foreign currency translation adjustments:
Net investment hedge	$ 3.7	$ 5.9	$ 17.5	$ 17.3
Long-term intercompany loans	(26.9)	17.1	(15.3)	3.0
Translation adjustments	(20.5)	0.9	(42.5)	(20.9)
Total foreign currency translation adjustment, pretax	(43.7)	23.9	(40.3)	(0.6)
Tax expense/(benefit)	(0.6)	2.4	2.5	4.3
Total foreign currency translation adjustment, net of tax	(43.1)	21.5	(42.8)	(4.9)
Net change in minimum pension liability
Net gain/(loss) recognized during the period	(1.2)	(0.6)	(4.1)	(1.9)
Total pension liability, pretax	1.2	0.6	4.1	1.9
Tax expense/(benefit)	1.1	0.2	1.0	0.5
Net change in minimum pension liability, net of tax	$ 0.1	$ 0.4	$ 3.1	$ 1.4