DMC Pension Plan (Expected Benefit Payments) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Jun. 30, 2013
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Estimated future employer contributions in next fiscal year	$ 1.1
Estimated future employer contributions, year two	5.0
Estimated future pension credit in next fiscal year	7.9
Expected future benefit payments, fiscal year maturity [Abstract]
Total	603.1
2013	48.7
2014	51.5
2015	54.1
2016	56.8
2017	60.0
Five years thereafter	$ 332.0
Expected long-term of return on plan assets, next fiscal year (percent)	7.00%
Interest cost rate (percent)	4.93%

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- Definition

The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions.

+ 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 (g)

-URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 5

-Subparagraph g

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

Amount of benefits expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year from a defined benefit plan.

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- Definition

Amount of benefits expected to be paid in the next fiscal year following the latest fiscal year from a defined benefit plan.

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- Definition

Amount of benefits expected to be paid in the fifth fiscal year following the latest fiscal year from a defined benefit plan.

+ References

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- Definition

Amount of benefits expected to be paid in the fourth fiscal year following the latest fiscal year from a defined benefit plan.

+ References

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- Definition

Amount of benefits expected to be paid in the third fiscal year following the latest fiscal year from a defined benefit plan.

+ References

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- Definition

Amount of benefits expected to be paid in the second fiscal year following the latest fiscal year from a defined benefit plan.

+ References

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- Definition

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets, Next Fiscal Year

+ References

No definition available.

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- Definition

Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Interest Cost Rate

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- Definition

Defined Benefit Plan, Estimated Future Employer Contributions in Year Two

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- Definition

Estimated pension credits for the next fiscal year based upon the excess of expected return on plan assets over the interest cost on the projected benefit obligation

+ References

No definition available.

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- Definition

Total amount of benefits expected to be paid in the future from a defined benefit plan.

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No definition available.

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