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Pension and Other Postretirement Benefits (Details 9) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Pension Plans
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	$ 1,024.4	$ 930.2	$ 770.9
Pension Plans | Short-term investments
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	15.3	13.7
Pension Plans | Domestic and international equities
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	142.1	281.8
Pension Plans | Commingled funds
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	406.1	216.5
Pension Plans | Limited partnerships
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	52.0	137.9
Pension Plans | Government agency bonds
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	134.6	109.8
Pension Plans | Corporate bonds
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	248.1	149.8
Pension Plans | Mutual funds
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	2.9	2.5
Pension Plans | Mortgage/ asset backed securities and other
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	23.3	18.2
Pension Plans | Level 1
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	214.5	344.3
Pension Plans | Level 1 | Domestic and international equities
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	142.1	281.8
Pension Plans | Level 1 | Commingled funds
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	64.7	52.1
Pension Plans | Level 1 | Government agency bonds
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	4.8	7.9
Pension Plans | Level 1 | Mutual funds
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	2.9	2.5
Pension Plans | Level 2
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	809.9	585.9
Pension Plans | Level 2 | Short-term investments
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	15.3	13.7
Pension Plans | Level 2 | Commingled funds
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	341.4	164.4
Pension Plans | Level 2 | Limited partnerships
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	52.0	137.9
Pension Plans | Level 2 | Government agency bonds
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	129.8	101.9
Pension Plans | Level 2 | Corporate bonds
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	248.1	149.8
Pension Plans | Level 2 | Mortgage/ asset backed securities and other
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	23.3	18.2
Other Postretirement Plans
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	106.5	93.2	85.3
Other Postretirement Plans | Short-term investments
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	17.2	14.2
Other Postretirement Plans | Commingled funds
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	61.2	51.4
Other Postretirement Plans | Government agency bonds
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	18.6	15.9
Other Postretirement Plans | Corporate bonds
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	6.8	7.5
Other Postretirement Plans | Mortgage/ asset backed securities and other
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	2.7	4.2
Other Postretirement Plans | Level 2
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	106.5	93.2
Other Postretirement Plans | Level 2 | Short-term investments
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	17.2	14.2
Other Postretirement Plans | Level 2 | Commingled funds
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	61.2	51.4
Other Postretirement Plans | Level 2 | Government agency bonds
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	18.6	15.9
Other Postretirement Plans | Level 2 | Corporate bonds
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	6.8	7.5
Other Postretirement Plans | Level 2 | Mortgage/ asset backed securities and other
Pension and Other Postretirement Benefit Disclosures
Fair value of pension plan assets	$ 2.7	$ 4.2

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- Definition

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Section 35

-Paragraph 50

-URI http://asc.fasb.org/extlink&oid=29635418&loc=d3e12355-114930

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