Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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- Definition

The total amount of operating revenues recognized during the period.

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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.

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- Definition

The amount of operating expenses for the period that are associated with the utility's normal revenue producing operation; including selling, general, and administrative expenses, costs incurred for routine plant repairs and maintenance, and operations.

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Business Segments (Narrative) (Details) $ in Millions	3 Months Ended								12 Months Ended
Business Segments (Narrative) (Details) $ in Millions	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2018 USD ($) segment	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Segment Reporting Information [Line Items]
Loss on sale									$ 89	$ (28)	$ (27)
Operation, maintenance and other									6,463	5,944	6,224
Revenues	$ 6,115	$ 6,628	$ 5,643	$ 6,135	$ 5,799	$ 6,482	$ 5,555	$ 5,729	$ 24,521	23,565	22,743
Duke Energy Progress [Member]
Segment Reporting Information [Line Items]
Number of Reportable Segments \| segment									1
Loss on sale									$ (9)	(4)	(3)
Operation, maintenance and other									1,578	1,439	1,565
Revenues	1,366	1,582	1,291	1,460	1,251	1,460	1,199	1,219	$ 5,699	5,129	5,277
Duke Energy Ohio [Member]
Segment Reporting Information [Line Items]
Number of Reportable Segments \| segment									2
Loss on sale									$ 106	(1)	(2)
Operation, maintenance and other									480	530	514
Revenues	$ 505	$ 469	$ 459	$ 524	$ 497	$ 471	$ 437	$ 518	1,957	$ 1,923	$ 1,944
Beckjord [Member]
Segment Reporting Information [Line Items]
Loss on sale									106
Operation, maintenance and other									1
Revenue [Member] \| Customer Concentration Risk [Member] \| Duke Energy Progress [Member]
Segment Reporting Information [Line Items]
Revenues									$ 633