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Commitments And Contingent Liabilities (Minimum Fuel Purchase Requirements) (Detail) - Jun. 30, 2015 - Power [Member] - USD ($) $ in Millions | Total
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Long-term Purchase Commitment [Line Items] |
Coverage percentage of nuclear fuel commitments of uranium, enrichment, and fabrication requirements | 100.00%
Commitments Through 2019 [Member] | Nuclear Fuel Uranium [Member] |
Long-term Purchase Commitment [Line Items] |
Total minimum purchase requirements | $ 443
Commitments Through 2019 [Member] | Nuclear Fuel Enrichment [Member] |
Long-term Purchase Commitment [Line Items] |
Total minimum purchase requirements | 342
Commitments Through 2019 [Member] | Nuclear Fuel Fabrication [Member] |
Long-term Purchase Commitment [Line Items] |
Total minimum purchase requirements | 185
Commitments Through 2019 [Member] | Natural Gas [Member] |
Long-term Purchase Commitment [Line Items] |
Total minimum purchase requirements | 1,072
Commitments Through 2019 [Member] | Coal [Member] |
Long-term Purchase Commitment [Line Items] |
Total minimum purchase requirements | $ 360

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- Definition Coverage percentage of nuclear fuel commitments of uranium, enrichment, and fabrication requirements. + References No definition available. + Details
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- Definition The minimum amount the entity agreed to spend under the long-term purchase commitment. + References No definition available. + Details
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