Pension and Other Postretirement Benefits - Schedule of Amounts Recognized in the Accumulated other Comprehensive Loss (Details) - USD ($) $ in Millions	Jun. 30, 2023	Jun. 30, 2022
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	$ 848.2	$ 959.4
Fair value of plan assets	654.8	759.4
Other Benefits
Defined Benefit Plan Disclosure [Line Items]
Projected benefit obligation	182.3	206.1
Fair value of plan assets	$ 120.4	$ 114.7

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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/2003/role/exampleRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480482/715-20-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480506/715-20-50-3

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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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