Asset Retirement Obligations (Recorded on the Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	$ 9,156	$ 12,728	$ 12,600
Less: Current portion	596	773
Total noncurrent asset retirement obligation	8,560	11,955
Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	4,576
Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	4,313
Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	267
Duke Energy Carolinas
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	4,013	5,382	5,301
Less: Current portion	224	261
Total noncurrent asset retirement obligation	3,789	5,121
Duke Energy Carolinas | Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	1,949
Duke Energy Carolinas | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	2,010
Duke Energy Carolinas | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	54
Progress Energy
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	4,145	6,181	6,112
Less: Current portion	245	289
Total noncurrent asset retirement obligation	3,900	5,892
Progress Energy | Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	2,601
Progress Energy | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	1,449
Progress Energy | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	95
Duke Energy Progress
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	3,870	5,823	5,675
Less: Current portion	244	288
Total noncurrent asset retirement obligation	3,626	5,535
Duke Energy Progress | Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	2,410
Duke Energy Progress | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	1,427
Duke Energy Progress | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	33
Duke Energy Florida
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	275	358	437
Less: Current portion	1	1
Total noncurrent asset retirement obligation	274	357
Duke Energy Florida | Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	191
Duke Energy Florida | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	21
Duke Energy Florida | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	63
Duke Energy Ohio
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	136	154	136
Less: Current portion	6	17
Total noncurrent asset retirement obligation	130	137
Duke Energy Ohio | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	73
Duke Energy Ohio | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	63
Duke Energy Indiana
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	809	951	987
Less: Current portion	120	207
Total noncurrent asset retirement obligation	689	744
Duke Energy Indiana | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	781
Duke Energy Indiana | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	28
Piedmont
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	26	26	$ 22
Total noncurrent asset retirement obligation	26	$ 26
Piedmont | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	$ 26