Income Taxes (Deferred Income Taxes) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	$ 327	$ 348
Lease obligations	418	405
Pension, post-retirement and other employee benefits	65	192
Progress Energy merger purchase accounting adjustments	260	301
Tax credits and NOL carryforwards	4,489	4,426
Other	102	106
Valuation allowance	(544)	(519)
Total deferred income tax assets	5,117	5,259
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(1,812)	(1,671)
Accelerated depreciation rates	(11,969)	(11,478)
Regulatory assets and deferred debits, net	(1,892)	(2,074)
Total deferred income tax liabilities	(15,673)	(15,223)
Net deferred income tax liabilities	(10,556)	(9,964)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	4,489	4,426
Valuation allowance	544	519
General Business Credits
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	2,388
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	2,388
Foreign Tax Credit
Deferred Tax Assets, Gross [Abstract]
Valuation allowance	(389)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Valuation allowance	389
Foreign Tax Credit | Federal
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	1,155
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	1,155
State Carryforward And Credits | State
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	390
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	390
Corporate AMT Credit Cards
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	278
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	278
Federal Capital Loss
Deferred Tax Assets, Gross [Abstract]
Valuation allowance	(29)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Valuation allowance	29
Federal Capital Loss | Federal
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	73
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	73
NOL Carryforwards | Federal
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	193
Valuation allowance	(4)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	193
Valuation allowance	4
NOL Carryforwards | State
Deferred Tax Assets, Gross [Abstract]
Valuation allowance	(110)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Valuation allowance	110
NOL Carryforwards | Foreign
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	12
Valuation allowance	(12)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	12
Valuation allowance	12
Duke Energy Carolinas
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	194	170
Lease obligations	86	89
Pension, post-retirement and other employee benefits	(41)	(1)
Tax credits and NOL carryforwards	445	444
Other	29	18
Total deferred income tax assets	713	720
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(1,213)	(983)
Accelerated depreciation rates	(3,411)	(3,410)
Regulatory assets and deferred debits, net	(468)	(480)
Total deferred income tax liabilities	(5,092)	(4,873)
Net deferred income tax liabilities	(4,379)	(4,153)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	445	444
Progress Energy
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	77	117
Lease obligations	256	263
Pension, post-retirement and other employee benefits	(22)	12
Tax credits and NOL carryforwards	686	618
Other	22	22
Total deferred income tax assets	1,019	1,032
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(596)	(521)
Accelerated depreciation rates	(4,557)	(4,358)
Regulatory assets and deferred debits, net	(1,063)	(1,300)
Total deferred income tax liabilities	(6,216)	(6,179)
Net deferred income tax liabilities	(5,197)	(5,147)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	686	618
Duke Energy Progress
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	21	33
Lease obligations	179	197
Pension, post-retirement and other employee benefits	(1)	18
Tax credits and NOL carryforwards	230	167
Other	12	12
Total deferred income tax assets	441	427
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(520)	(432)
Accelerated depreciation rates	(1,823)	(1,844)
Regulatory assets and deferred debits, net	(658)	(628)
Total deferred income tax liabilities	(3,001)	(2,904)
Net deferred income tax liabilities	(2,560)	(2,477)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	230	167
Duke Energy Florida
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	56	83
Lease obligations	77	65
Pension, post-retirement and other employee benefits	(25)	(10)
Tax credits and NOL carryforwards	425	412
Other	8	10
Total deferred income tax assets	541	560
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(91)	(102)
Accelerated depreciation rates	(2,778)	(2,576)
Regulatory assets and deferred debits, net	(405)	(671)
Total deferred income tax liabilities	(3,274)	(3,349)
Net deferred income tax liabilities	(2,733)	(2,789)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	425	412
Duke Energy Ohio
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	13	12
Lease obligations	4	4
Pension, post-retirement and other employee benefits	5	9
Tax credits and NOL carryforwards	44	20
Regulatory liabilities and deferred credits		3
Investments and other assets		3
Other	5	5
Total deferred income tax assets	71	56
Deferred Tax Liabilities, Gross [Abstract]
Accelerated depreciation rates	(1,314)	(1,192)
Regulatory assets and deferred debits, net	(29)
Total deferred income tax liabilities	(1,343)	(1,192)
Net deferred income tax liabilities	(1,272)	(1,136)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	44	20
Duke Energy Indiana
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	18	23
Lease obligations	15	15
Pension, post-retirement and other employee benefits	2	10
Tax credits and NOL carryforwards	154	208
Regulatory liabilities and deferred credits	47	61
Investments and other assets	1
Other	5	2
Total deferred income tax assets	242	319
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets		(12)
Accelerated depreciation rates	(1,678)	(1,606)
Total deferred income tax liabilities	(1,678)	(1,618)
Net deferred income tax liabilities	(1,436)	(1,299)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	154	208
Piedmont
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	42	24
Lease obligations	3	3
Pension, post-retirement and other employee benefits	(5)	(2)
Tax credits and NOL carryforwards	50	37
Other	9	9
Total deferred income tax assets	99	71
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(37)	(28)
Accelerated depreciation rates	(944)	(892)
Regulatory assets and deferred debits, net	(51)	(21)
Total deferred income tax liabilities	(1,032)	(941)
Net deferred income tax liabilities	(933)	(870)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	$ 50	$ 37