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Commitments And Contingent Liabilities (Minimum Fuel Purchase Requirements) (Detail) - Power [Member] $ in Millions | 9 Months Ended
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Sep. 30, 2016 USD ($)
Long-term Purchase Commitment [Line Items] |
Coverage percentage of nuclear fuel commitments of uranium, enrichment, and fabrication requirements | 100.00%
Commitments Through 2020 [Member] | Nuclear Fuel Uranium [Member] |
Long-term Purchase Commitment [Line Items] |
Total minimum purchase requirements | $ 338
Commitments Through 2020 [Member] | Nuclear Fuel Enrichment [Member] |
Long-term Purchase Commitment [Line Items] |
Total minimum purchase requirements | 307
Commitments Through 2020 [Member] | Nuclear Fuel Fabrication [Member] |
Long-term Purchase Commitment [Line Items] |
Total minimum purchase requirements | 179
Commitments Through 2020 [Member] | Natural Gas [Member] |
Long-term Purchase Commitment [Line Items] |
Total minimum purchase requirements | 904
Commitments Through 2020 [Member] | Coal [Member] |
Long-term Purchase Commitment [Line Items] |
Total minimum purchase requirements | $ 235

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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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- 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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