Asset Retirement Obligations (ARO by Category) (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Asset Retirement Obligations [Line Items]
Total ARO	$ 10,354	$ 9,156
Less: Current portion	636	596
Total noncurrent ARO	9,718	8,560
Duke Energy Carolinas
Asset Retirement Obligations [Line Items]
Total ARO	4,112	4,013
Less: Current portion	252	224
Total noncurrent ARO	3,860	3,789
Progress Energy
Asset Retirement Obligations [Line Items]
Total ARO	4,791	4,145
Less: Current portion	215	245
Total noncurrent ARO	4,576	3,900
Duke Energy Progress
Asset Retirement Obligations [Line Items]
Total ARO	4,556	3,870
Less: Current portion	214	244
Total noncurrent ARO	4,342	3,626
Duke Energy Florida
Asset Retirement Obligations [Line Items]
Total ARO	235	275
Less: Current portion	1	1
Total noncurrent ARO	234	274
Duke Energy Ohio
Asset Retirement Obligations [Line Items]
Total ARO	136	136
Less: Current portion	7	6
Total noncurrent ARO	129	130
Duke Energy Indiana
Asset Retirement Obligations [Line Items]
Total ARO	1,282	809
Less: Current portion	162	120
Total noncurrent ARO	1,120	689
Piedmont
Asset Retirement Obligations [Line Items]
Total ARO	27	26
Less: Current portion	0
Total noncurrent ARO	27	$ 26
Decommissioning of nuclear power facilities
Asset Retirement Obligations [Line Items]
Total ARO	4,608
Decommissioning of nuclear power facilities | Duke Energy Carolinas
Asset Retirement Obligations [Line Items]
Total ARO	1,999
Decommissioning of nuclear power facilities | Progress Energy
Asset Retirement Obligations [Line Items]
Total ARO	2,603
Decommissioning of nuclear power facilities | Duke Energy Progress
Asset Retirement Obligations [Line Items]
Total ARO	2,455
Decommissioning of nuclear power facilities | Duke Energy Florida
Asset Retirement Obligations [Line Items]
Total ARO	148
Decommissioning of nuclear power facilities | Duke Energy Ohio
Asset Retirement Obligations [Line Items]
Total ARO	0
Decommissioning of nuclear power facilities | Duke Energy Indiana
Asset Retirement Obligations [Line Items]
Total ARO	0
Decommissioning of nuclear power facilities | Piedmont
Asset Retirement Obligations [Line Items]
Total ARO	0
Closure of ash impoundments
Asset Retirement Obligations [Line Items]
Total ARO	5,473
Closure of ash impoundments | Duke Energy Carolinas
Asset Retirement Obligations [Line Items]
Total ARO	2,058
Closure of ash impoundments | Progress Energy
Asset Retirement Obligations [Line Items]
Total ARO	2,091
Closure of ash impoundments | Duke Energy Progress
Asset Retirement Obligations [Line Items]
Total ARO	2,067
Closure of ash impoundments | Duke Energy Florida
Asset Retirement Obligations [Line Items]
Total ARO	24
Closure of ash impoundments | Duke Energy Ohio
Asset Retirement Obligations [Line Items]
Total ARO	71
Closure of ash impoundments | Duke Energy Indiana
Asset Retirement Obligations [Line Items]
Total ARO	1,253
Closure of ash impoundments | Piedmont
Asset Retirement Obligations [Line Items]
Total ARO	0
Other
Asset Retirement Obligations [Line Items]
Total ARO	273
Other | Duke Energy Carolinas
Asset Retirement Obligations [Line Items]
Total ARO	55
Other | Progress Energy
Asset Retirement Obligations [Line Items]
Total ARO	97
Other | Duke Energy Progress
Asset Retirement Obligations [Line Items]
Total ARO	34
Other | Duke Energy Florida
Asset Retirement Obligations [Line Items]
Total ARO	63
Other | Duke Energy Ohio
Asset Retirement Obligations [Line Items]
Total ARO	65
Other | Duke Energy Indiana
Asset Retirement Obligations [Line Items]
Total ARO	29
Other | Piedmont
Asset Retirement Obligations [Line Items]
Total ARO	$ 27