Asset Retirement Obligations (Recorded on the Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	$ 12,728	$ 12,600	$ 12,854
Less: Current portion	773	647
Total noncurrent asset retirement obligation	11,955	11,953
Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	7,261
Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	5,176
Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	291
Duke Energy Carolinas
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	5,382	5,301	5,350
Less: Current portion	261	249
Total noncurrent asset retirement obligation	5,121	5,052
Duke Energy Carolinas | Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	3,009
Duke Energy Carolinas | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	2,309
Duke Energy Carolinas | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	64
Progress Energy
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	6,181	6,112	6,149
Less: Current portion	289	275
Total noncurrent asset retirement obligation	5,892	5,837
Progress Energy | Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	4,217
Progress Energy | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	1,862
Progress Energy | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	102
Duke Energy Progress
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	5,823	5,675	5,635
Less: Current portion	288	274
Total noncurrent asset retirement obligation	5,535	5,401
Duke Energy Progress | Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	3,948
Duke Energy Progress | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	1,833
Duke Energy Progress | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	42
Duke Energy Florida
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	358	437	514
Less: Current portion	1	1
Total noncurrent asset retirement obligation	357	436
Duke Energy Florida | Decommissioning of nuclear power facilities
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	270
Duke Energy Florida | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	29
Duke Energy Florida | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	59
Duke Energy Ohio
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	154	136	111
Less: Current portion	17	13
Total noncurrent asset retirement obligation	137	123
Duke Energy Ohio | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	95
Duke Energy Ohio | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	59
Duke Energy Indiana
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	951	987	1,176
Less: Current portion	207	110
Total noncurrent asset retirement obligation	744	877
Duke Energy Indiana | Closure of ash impoundments
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	911
Duke Energy Indiana | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	40
Piedmont
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	26	22	$ 20
Total noncurrent asset retirement obligation	26	$ 22
Piedmont | Other
Asset Retirement Obligation [Line Items]
Total asset retirement obligation	$ 26