Equity and Accumulated Other Comprehensive Income (Loss) - Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	$ (329.0)		$ (317.0)
Other comprehensive income/(loss) before reclassifications	(16.0)		(29.0)
Amounts reclassified from accumulated other comprehensive income/(loss)	0.0		1.0
Total foreign currency translation adjustment, net of tax	(18.0)	$ 39.0	(32.0)	$ 55.0
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	0.0	1.0	1.0	1.0
Net change in derivatives and hedges, net of tax	3.0	0.0	4.0	1.0
Available for sale investments	(1.0)	0.0	(1.0)	0.0
Other comprehensive income/(loss), net of tax	(16.0)	40.0	(28.0)	57.0
Ending Balance	(345.0)		(345.0)
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(282.0)		(268.0)
Other comprehensive income/(loss) before reclassifications	(18.0)		(32.0)
Amounts reclassified from accumulated other comprehensive income/(loss)	0.0		0.0
Total foreign currency translation adjustment, net of tax	(18.0)		(32.0)
Ending Balance	(300.0)		(300.0)
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(46.0)		(47.0)
Other comprehensive income/(loss) before reclassifications	0.0		0.0
Amounts reclassified from accumulated other comprehensive income/(loss)	0.0		1.0
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax	0.0		1.0
Ending Balance	(46.0)		(46.0)
AOCI, Derivative Qualifying as Hedge, Parent [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	1.0		0.0
Other comprehensive income/(loss) before reclassifications	3.0		4.0
Amounts reclassified from accumulated other comprehensive income/(loss)	0.0		0.0
Net change in derivatives and hedges, net of tax	3.0		4.0
Ending Balance	4.0		4.0
ACOI, Accumulated Gain (Loss), Marketable Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(1.0)		(1.0)
Other comprehensive income/(loss) before reclassifications	(1.0)		(1.0)
Amounts reclassified from accumulated other comprehensive income/(loss)	0.0		0.0
Available for sale investments	(1.0)	$ 0.0	(1.0)	$ 0.0
Ending Balance	(2.0)		(2.0)
Available-for-sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning Balance	(1.0)		(1.0)
Other comprehensive income/(loss) before reclassifications	0.0		0.0
Amounts reclassified from accumulated other comprehensive income/(loss)	0.0		0.0
Other Comprehensive Income, Other, Net of Tax	0.0		0.0
Ending Balance	$ (1.0)		$ (1.0)