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Fair Values by Asset Category of Defined Benefit Pension Plan (Parenthetical) (Detail)	Jun. 30, 2013	Jun. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocation	100.00%	100.00%
Large Cap Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocation	76.00%
Emerging Markets Equity Fund
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocation	7.00%
International Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocation	17.00%
Short Term Fixed Income Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocation	12.00%
High Yield Fixed Income Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocation	9.00%
Intermediate Fixed Income Funds
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocation	44.00%
REITs and MLPs Funds
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocation	27.00%
Hedge Funds
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocation	8.00%

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- Definition

Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e2446-114920



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (d)(1)

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

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