Pension and Postretirement Benefit Plans (Schedule of obligations and funded status) (Details) - USD ($) $ in Millions	12 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Pension
Change in Benefit Obligation [Roll Forward]
Foreign currency exchange rate impact	$ 0.0	$ 0.0
Change in Plan Assets [Roll Forward]
Foreign currency exchange rate impact	0.0	0.0
Postretirement
Change in Benefit Obligation [Roll Forward]
Benefit obligation, beginning of year	9.3	9.7
Acquisitions	0.0	0.0
Service cost	0.1	0.1	$ 0.1
Interest cost	0.3	0.3	0.4
Participant contributions	0.8	0.8
Plan amendments	0.0	0.0
Net actuarial loss (gain)	(0.8)	(0.2)
Benefits paid (including lump sums)	(1.3)	(1.4)
Curtailments	0.0	0.0
Foreign currency exchange rate impact	0.0	0.0
Benefit obligation, end of year	8.4	9.3	9.7
Change in Plan Assets [Roll Forward]
Fair value of plan assets, beginning of year	0.0	0.0
Acquisitions	0.0	0.0
Actual return on plan assets	0.0	0.0
Employer contributions	0.5	0.6
Participant contributions	0.8	0.8
Benefits paid (including lump sums)	(1.3)	(1.4)
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	(8.4)	(9.3)
Domestic \| Pension
Change in Benefit Obligation [Roll Forward]
Benefit obligation, beginning of year	170.9	161.9
Acquisitions	0.0	0.0
Service cost	13.0	12.5	11.9
Interest cost	5.9	4.9	5.9
Participant contributions	0.0	0.0
Plan amendments	1.2	0.5
Net actuarial loss (gain)	2.4	3.6
Benefits paid (including lump sums)	(12.9)	(12.5)
Curtailments	(1.1)	0.0
Benefit obligation, end of year	179.4	170.9	161.9
Change in Plan Assets [Roll Forward]
Fair value of plan assets, beginning of year	139.2	122.6
Acquisitions	0.0	0.0
Actual return on plan assets	12.0	18.5
Employer contributions	0.7	10.6
Participant contributions	0.0	0.0
Benefits paid (including lump sums)	(12.9)	(12.5)
Fair value of plan assets, end of year	139.0	139.2	$ 122.6
Over (under) funded status, end of year	(40.4)	(31.7)
International \| Pension
Change in Benefit Obligation [Roll Forward]
Benefit obligation, beginning of year	0.0
Acquisitions	836.6
Service cost	0.0
Interest cost	8.0
Participant contributions	0.0
Plan amendments	0.0
Net actuarial loss (gain)	(21.0)
Benefits paid (including lump sums)	(44.1)
Curtailments	0.0
Foreign currency exchange rate impact	(58.0)
Benefit obligation, end of year	721.5	0.0
Change in Plan Assets [Roll Forward]
Fair value of plan assets, beginning of year	0.0
Acquisitions	867.7
Actual return on plan assets	(6.7)
Employer contributions	88.9
Participant contributions	0.0
Benefits paid (including lump sums)	(44.1)
Foreign currency exchange rate impact	(64.3)
Fair value of plan assets, end of year	841.5	$ 0.0
Over (under) funded status, end of year	$ 120.0

Amount of increase (decrease) in plan assets of defined benefit plan from actual return (loss) determined by change in fair value of plan assets adjusted for contributions, benefit payments, and other expenses.

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- Definition

Amount of gain (loss) from change in actuarial assumptions which (increases) decreases benefit obligation of defined benefit plan. Assumptions include, but are not limited to, interest, mortality, employee turnover, salary, and temporary deviation from substantive plan.

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- Definition

Amount of actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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Amount of payment to participant of defined benefit plan which decreases benefit obligation. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 60
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Amount of contributions received by defined benefit plan from participant which increase benefit obligation.

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- Definition

Amount of increase in benefit obligation of defined benefit plan from business combination.

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Amount of increase in plan assets of defined benefit plan from business combination.

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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- Definition

Amount of contribution received by defined benefit plan from employer which increases plan assets.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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- Definition

Amount of (increase) decrease in benefit obligation of defined benefit plan from event reducing expected years of future service of present employees or eliminating accrual of benefits for some or all future services of present employees.

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- Definition

Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees.

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- Definition

Amount of foreign currency translation gain (loss) which (increases) decreases benefit obligation of defined benefit plan.

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- Definition

Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status.

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Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of increase (decrease) in benefit obligation of defined benefit plan from change in terms of existing plan or initiation of new plan.

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Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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Amount of contributions received by defined benefit plan from participant which increases plan assets.

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Amount of foreign currency translation gain (loss) which increases (decreases) plan assets of defined benefit plan.

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- Definition

Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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