v3.3.0.814

Acquisitions and Dispositions Purchase Price Allocation (Details) - Duke Energy Progress [Member] - NCEMPA Generating Assets [Member] $ in Millions | Sep. 30, 2015 USD ($)
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Business Acquisition [Line Items] |
Inventory | $ 56
Net property, plant, and equipment | 845
Total assets | 901
Purchase acquisition adjustment | 350
Total purchase price | $ 1,251

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