Asset Retirement Obligations (NDTF Information) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
NDTF Information [Abstract]
Annual funding requirement	$ 10
Decommissioning costs	9,105
Legally restricted NDTF investments, fair value	7,466	$ 8,933
Duke Energy Carolinas
NDTF Information [Abstract]
Decommissioning costs	4,365
Legally restricted NDTF investments, fair value	4,208	5,068
Duke Energy Progress
NDTF Information [Abstract]
Annual funding requirement	10
Decommissioning costs	4,181
Legally restricted NDTF investments, fair value	3,258	$ 3,865
Duke Energy Florida
NDTF Information [Abstract]
Decommissioning costs	$ 559