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Employee Benefit Plans - Additional Information (Detail) $ in Millions | Jun. 30, 2015 USD ($)
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Defined Benefit Pension Plans |
Defined Benefit Plan Disclosure [Line Items] |
Expected contribution during 2015 | $ 19.6
OPEB |
Defined Benefit Plan Disclosure [Line Items] |
Expected contribution during 2015 | $ 1.3

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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