Pension and Other Postretirement Benefits - Schedule of Amounts Recognized in the Accumulated other Comprehensive Loss (Details) - USD ($) $ in Millions	Jun. 30, 2018	Jun. 30, 2017
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 1,264.4	$ 1,369.0
Fair value of plan assets	972.4	987.4
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	241.5	255.1
Fair value of plan assets	$ 117.9	$ 117.0

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- Definition

Amount of plan asset for defined benefit pension plan with projected benefit obligation in excess of plan assets.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2417-114920

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- Definition

Amount of projected benefit obligation for defined benefit pension plan with projected benefit obligation in excess of plan assets.

+ References

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