Income Taxes (Deferred Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	$ 284	$ 327
Lease obligations	430	418
Pension, post-retirement and other employee benefits	89	65
Progress Energy merger purchase accounting adjustments	227	260
Tax credits and NOL carryforwards	3,845	4,489
Other	35	102
Valuation allowance	(517)	(544)
Total deferred income tax assets	4,393	5,117
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(2,114)	(1,812)
Accelerated depreciation rates	(11,942)	(11,969)
Regulatory assets and deferred debits, net	(1,761)	(1,892)
Total deferred income tax liabilities	(15,817)	(15,673)
Net deferred income tax liabilities	(11,424)	(10,556)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	3,845	4,489
Valuation allowance	517	544
Net operating loss carry forward	523	214	$ 550
General Business Credits
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	2,186
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	2,186
Foreign Tax Credit
Deferred Tax Assets, Gross [Abstract]
Valuation allowance	(404)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Valuation allowance	404
Foreign Tax Credit | Federal
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	615
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	615
State Carryforward And Credits | State
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	316
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	316
Corporate AMT Credit Cards
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	717
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	717
NOL Carryforwards | State
Deferred Tax Assets, Gross [Abstract]
Valuation allowance	(102)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Valuation allowance	102
NOL Carryforwards | Foreign
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	11
Valuation allowance	(11)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	11
Valuation allowance	11
Duke Energy Carolinas
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	217	194
Lease obligations	88	86
Pension, post-retirement and other employee benefits	(33)	(41)
Tax credits and NOL carryforwards	522	445
Other	11	29
Total deferred income tax assets	805	713
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(1,350)	(1,213)
Accelerated depreciation rates	(3,203)	(3,411)
Regulatory assets and deferred debits, net	(304)	(468)
Total deferred income tax liabilities	(4,857)	(5,092)
Net deferred income tax liabilities	(4,052)	(4,379)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	522	445
Net operating loss carry forward	47	2	97
Progress Energy
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	84	77
Lease obligations	265	256
Pension, post-retirement and other employee benefits	(23)	(22)
Tax credits and NOL carryforwards	783	686
Other	5	22
Total deferred income tax assets	1,114	1,019
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(724)	(596)
Accelerated depreciation rates	(4,608)	(4,557)
Regulatory assets and deferred debits, net	(1,045)	(1,063)
Total deferred income tax liabilities	(6,377)	(6,216)
Net deferred income tax liabilities	(5,263)	(5,197)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	783	686
Net operating loss carry forward	85	116	128
Duke Energy Progress
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	43	21
Lease obligations	179	179
Pension, post-retirement and other employee benefits	(1)	(1)
Tax credits and NOL carryforwards	312	230
Other	3	12
Total deferred income tax assets	536	441
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(671)	(520)
Accelerated depreciation rates	(1,624)	(1,823)
Regulatory assets and deferred debits, net	(585)	(658)
Total deferred income tax liabilities	(2,880)	(3,001)
Net deferred income tax liabilities	(2,344)	(2,560)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	312	230
Net operating loss carry forward	66	59	9
Duke Energy Florida
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	41	56
Lease obligations	86	77
Pension, post-retirement and other employee benefits	(26)	(25)
Tax credits and NOL carryforwards	449	425
Other	2	8
Total deferred income tax assets	552	541
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(69)	(91)
Accelerated depreciation rates	(3,047)	(2,778)
Regulatory assets and deferred debits, net	(460)	(405)
Total deferred income tax liabilities	(3,576)	(3,274)
Net deferred income tax liabilities	(3,024)	(2,733)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	449	425
Net operating loss carry forward	30	5	111
Duke Energy Ohio
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	17	13
Lease obligations	2	4
Pension, post-retirement and other employee benefits	6	5
Tax credits and NOL carryforwards	70	44
Other	4	5
Total deferred income tax assets	99	71
Deferred Tax Liabilities, Gross [Abstract]
Accelerated depreciation rates	(1,361)	(1,314)
Regulatory assets and deferred debits, net	(52)	(29)
Total deferred income tax liabilities	(1,413)	(1,343)
Net deferred income tax liabilities	(1,314)	(1,272)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	70	44
Net operating loss carry forward	26	22	7
Duke Energy Indiana
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	15	18
Lease obligations	12	15
Pension, post-retirement and other employee benefits	1	2
Tax credits and NOL carryforwards	145	154
Regulatory liabilities and deferred credits	10	47
Investments and other assets		1
Other		5
Total deferred income tax assets	183	242
Deferred Tax Liabilities, Gross [Abstract]
Accelerated depreciation rates	(1,677)	(1,678)
Total deferred income tax liabilities	(1,677)	(1,678)
Net deferred income tax liabilities	(1,494)	(1,436)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	145	154
Net operating loss carry forward	8	54	13
Piedmont
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	40	42
Lease obligations	2	3
Pension, post-retirement and other employee benefits	(2)	(5)
Tax credits and NOL carryforwards	57	50
Other	8	9
Total deferred income tax assets	105	99
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(48)	(37)
Accelerated depreciation rates	(1,019)	(944)
Regulatory assets and deferred debits, net	(56)	(51)
Total deferred income tax liabilities	(1,123)	(1,032)
Net deferred income tax liabilities	(1,018)	(933)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	57	50
Net operating loss carry forward	$ 8	$ 15	$ 12