Pension and Postretirement Benefit Plans (Schedule of Obligations and Funded Status) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Postretirement
Change in Benefit Obligation [Roll Forward]
Benefit obligation, beginning of year	$ 8.5	$ 8.3
Service cost	0.0	0.0	$ 0.0
Interest cost	0.2	0.3	0.3
Participant contributions	0.8	0.8
Plan amendments	0.0	0.0
Net actuarial loss (gain)	(0.6)	0.1
Benefits paid (including lump sums)	(0.9)	(1.0)
Settlements	0.0	0.0
Foreign currency exchange rate impact	0.0	0.0
Benefit obligation, end of year	8.0	8.5	8.3
Change in Plan Assets [Roll Forward]
Fair value of plan assets, beginning of year	0.0	0.0
Actual return on plan assets	0.0	0.0
Employer contributions	0.1	0.2
Participant contributions	0.8	0.8
Benefits paid (including lump sums)	(0.9)	(1.0)
Settlements	0.0	0.0
Foreign currency exchange rate impact	0.0	0.0
Fair value of plan assets, end of year	0.0	0.0	0.0
Over (under) funded status, end of year	(8.0)	(8.5)
United States | Pension
Change in Benefit Obligation [Roll Forward]
Benefit obligation, beginning of year	169.8	187.5
Service cost	9.3	9.7	11.5
Interest cost	3.3	5.1	6.5
Participant contributions	0.0	0.0
Plan amendments	0.1	0.0
Net actuarial loss (gain)	0.0	13.5
Benefits paid (including lump sums)	(1.1)	(0.2)
Settlements	(14.6)	(45.8)
Foreign currency exchange rate impact	0.0	0.0
Benefit obligation, end of year	166.8	169.8	187.5
Change in Plan Assets [Roll Forward]
Fair value of plan assets, beginning of year	125.8	135.4
Actual return on plan assets	34.5	6.9
Employer contributions	5.8	29.5
Participant contributions	0.0	0.0
Benefits paid (including lump sums)	(1.1)	(0.2)
Settlements	(14.6)	(45.8)
Foreign currency exchange rate impact	0.0	0.0
Fair value of plan assets, end of year	150.4	125.8	135.4
Over (under) funded status, end of year	(16.4)	(44.0)
International | Pension
Change in Benefit Obligation [Roll Forward]
Benefit obligation, beginning of year	815.1	725.3
Service cost	0.0	0.0	0.1
Interest cost	10.0	14.4	16.9
Participant contributions	0.0	0.0
Plan amendments	1.5	0.0
Net actuarial loss (gain)	(22.2)	124.3
Benefits paid (including lump sums)	(19.8)	(22.0)
Settlements	0.0	(4.0)
Foreign currency exchange rate impact	101.9	(22.9)
Benefit obligation, end of year	886.5	815.1	725.3
Change in Plan Assets [Roll Forward]
Fair value of plan assets, beginning of year	948.9	872.1
Actual return on plan assets	(40.4)	112.7
Employer contributions	14.9	18.2
Participant contributions	0.0	0.0
Benefits paid (including lump sums)	(19.8)	(22.0)
Settlements	0.0	(4.0)
Foreign currency exchange rate impact	119.3	(28.1)
Fair value of plan assets, end of year	1,022.9	948.9	$ 872.1
Over (under) funded status, end of year	$ 136.4	$ 133.8