Goodwill and Intangible Assets (Schedule of Intangible Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	$ 273	$ 264
Accumulated amortization	(8)	(28)
Total intangible assets, net	265	236
Emission allowances
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	8	8
Renewable energy certificates
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	210	204
Natural gas, coal and power contracts
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount		24
Accumulated amortization		(24)
Other
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	55	28
Accumulated amortization	(8)	(4)
Duke Energy Carolinas
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	84	73
Total intangible assets, net	84	73
Duke Energy Carolinas | Renewable energy certificates
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	84	73
Progress Energy
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	133	136
Accumulated amortization	(1)
Total intangible assets, net	132	136
Progress Energy | Emission allowances
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	5	5
Progress Energy | Renewable energy certificates
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	124	131
Progress Energy | Other
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	4
Accumulated amortization	(1)
Duke Energy Progress
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	127	133
Total intangible assets, net	127	133
Duke Energy Progress | Emission allowances
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	2	2
Duke Energy Progress | Renewable energy certificates
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	124	131
Duke Energy Progress | Other
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	1
Duke Energy Florida
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	6	3
Accumulated amortization	(1)
Total intangible assets, net	5	3
Duke Energy Florida | Emission allowances
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	3	3
Duke Energy Florida | Other
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	3
Accumulated amortization	(1)
Duke Energy Ohio
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	2
Total intangible assets, net	2
Duke Energy Ohio | Renewable energy certificates
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	2
Duke Energy Indiana
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	2	26
Accumulated amortization		(24)
Total intangible assets, net	2	2
Duke Energy Indiana | Emission allowances
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	2	2
Duke Energy Indiana | Natural gas, coal and power contracts
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount		24
Accumulated amortization		$ (24)
Piedmont
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	22
Accumulated amortization	(2)
Total intangible assets, net	20
Piedmont | Other
Finite-Lived Intangible Assets, Net [Abstract]
Gross carrying amount	22
Accumulated amortization	$ (2)