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=118932676&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, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2019 USD ($) segment	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Segment Reporting Information [Line Items]
Loss on sale									$ 4	$ 89	$ (28)
Operation, maintenance and other									6,066	6,463	5,944
Revenues	$ 6,103	$ 6,940	$ 5,873	$ 6,163	$ 6,115	$ 6,628	$ 5,643	$ 6,135	25,079	24,521	23,565
Duke Energy Progress
Segment Reporting Information [Line Items]
Loss on sale										(9)	(4)
Operation, maintenance and other									1,446	1,578	1,439
Revenues	1,398	1,688	1,387	1,484	1,366	1,582	1,291	1,460	$ 5,957	5,699	5,129
Number of reportable segments \| segment									1
Duke Energy Ohio
Segment Reporting Information [Line Items]
Loss on sale										106	(1)
Operation, maintenance and other									$ 520	480	530
Revenues	$ 487	$ 489	$ 433	$ 531	$ 505	$ 469	$ 459	$ 524	$ 1,940	1,957	1,923
Number of reportable segments \| segment									2
Revenues \| Duke Energy Progress \| Customer Concentration
Segment Reporting Information [Line Items]
Revenues									$ 635
Beckjord
Segment Reporting Information [Line Items]
Loss on sale										106
Operation, maintenance and other										1
Commercial Renewables
Segment Reporting Information [Line Items]
Revenues									$ 487	$ 477	$ 460