Severance (Narrative) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Restructuring Cost and Reserve [Line Items]
Regulatory assets	$ 18,130	$ 14,637
Duke Energy Carolinas
Restructuring Cost and Reserve [Line Items]
Regulatory assets	5,388	3,479
Duke Energy Carolinas | Employee Severance
Restructuring Cost and Reserve [Line Items]
Regulatory assets			$ 65
Duke Energy Progress
Restructuring Cost and Reserve [Line Items]
Regulatory assets	$ 5,414	$ 4,651
Duke Energy Progress | Employee Severance
Restructuring Cost and Reserve [Line Items]
Regulatory assets			$ 33