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Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Comprehensive Income (Loss), Net of Tax, Attributable to Parent | $ 2,653 | $ 3,085 | $ 2,865
Duke Energy Progress [Member] |  |  |
Comprehensive Income (Loss), Net of Tax, Attributable to Parent | 667 | 715 | 599
Duke Energy Ohio [Member] |  |  |
Comprehensive Income (Loss), Net of Tax, Attributable to Parent | $ 176 | $ 192 | $ 228

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