Income Taxes (Deferred Income Taxes) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	$ 348	$ 347
Lease obligations	405	346
Deferred Tax Assets, Tax Deferred Expense (Benefits), Compensation and Benefits	192	207
Progress Energy merger purchase accounting adjustments	301	340
Tax credits and NOL carryforwards	4,426	3,784
Other	106	85
Valuation allowance	(519)	(518)
Total deferred income tax assets	5,259	4,591
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(1,671)	(2,428)
Accelerated depreciation rates	(11,478)	(10,391)
Regulatory assets and deferred debits, net	(2,074)	(1,151)
Total deferred income tax liabilities	(15,223)	(13,970)
Net deferred income tax liabilities	(9,964)	(9,379)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	4,426	3,784
Valuation allowance	519	518
General Business Credits
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	2,473
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	2,473
NOL Carryforwards | Federal
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	306
Valuation allowance	(4)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	306
Valuation allowance	4
NOL Carryforwards | State
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	394
Valuation allowance	(109)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	394
Valuation allowance	109
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
Charitable contribution carryforwards
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	18
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	18
Foreign Tax Credit
Deferred Tax Assets, Gross [Abstract]
Valuation allowance	(391)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Valuation allowance	391
Foreign Tax Credit | Foreign
Deferred Tax Assets, Gross [Abstract]
Tax credits and NOL carryforwards	1,223
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	1,223
Duke Energy Carolinas
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	170	121
Lease obligations	89	91
Deferred Tax Assets, Tax Deferred Expense (Benefits), Compensation and Benefits	(1)	(36)
Tax credits and NOL carryforwards	444	349
Regulatory liabilities and deferred credits		11
Other	18	12
Total deferred income tax assets	720	548
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(983)	(1,205)
Accelerated depreciation rates	(3,410)	(2,977)
Regulatory assets and deferred debits, net	(480)
Total deferred income tax liabilities	(4,873)	(4,182)
Net deferred income tax liabilities	(4,153)	(3,634)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	444	349
Progress Energy
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	117	101
Lease obligations	263	197
Deferred Tax Assets, Tax Deferred Expense (Benefits), Compensation and Benefits	12	30
Tax credits and NOL carryforwards	618	497
Other	22	12
Total deferred income tax assets	1,032	837
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(521)	(742)
Accelerated depreciation rates	(4,358)	(3,891)
Regulatory assets and deferred debits, net	(1,300)	(768)
Total deferred income tax liabilities	(6,179)	(5,401)
Net deferred income tax liabilities	(5,147)	(4,564)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	618	497
Duke Energy Progress
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	33	60
Lease obligations	197	121
Deferred Tax Assets, Tax Deferred Expense (Benefits), Compensation and Benefits	18	17
Tax credits and NOL carryforwards	167	160
Other	12	7
Total deferred income tax assets	427	365
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(432)	(610)
Accelerated depreciation rates	(1,844)	(1,546)
Regulatory assets and deferred debits, net	(628)	(417)
Total deferred income tax liabilities	(2,904)	(2,573)
Net deferred income tax liabilities	(2,477)	(2,208)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	167	160
Duke Energy Florida
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	83	40
Lease obligations	65	76
Deferred Tax Assets, Tax Deferred Expense (Benefits), Compensation and Benefits	(10)	7
Tax credits and NOL carryforwards	412	306
Other	10	4
Total deferred income tax assets	560	433
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(102)	(135)
Accelerated depreciation rates	(2,576)	(2,382)
Regulatory assets and deferred debits, net	(671)	(350)
Total deferred income tax liabilities	(3,349)	(2,867)
Net deferred income tax liabilities	(2,789)	(2,434)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	412	306
Duke Energy Ohio
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	12	19
Lease obligations	4	4
Deferred Tax Assets, Tax Deferred Expense (Benefits), Compensation and Benefits	9	11
Tax credits and NOL carryforwards	20	13
Regulatory liabilities and deferred credits	3	16
Investments and other assets	3	5
Other	5	7
Total deferred income tax assets	56	75
Deferred Tax Liabilities, Gross [Abstract]
Accelerated depreciation rates	(1,192)	(1,125)
Total deferred income tax liabilities	(1,192)	(1,125)
Net deferred income tax liabilities	(1,136)	(1,050)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	20	13
Duke Energy Indiana
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	23	7
Lease obligations	15	16
Deferred Tax Assets, Tax Deferred Expense (Benefits), Compensation and Benefits	10	20
Tax credits and NOL carryforwards	208	195
Regulatory liabilities and deferred credits	61
Investments and other assets		6
Other	2	2
Total deferred income tax assets	319	246
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(12)
Accelerated depreciation rates	(1,606)	(1,496)
Regulatory assets and deferred debits, net		(53)
Total deferred income tax liabilities	(1,618)	(1,549)
Net deferred income tax liabilities	(1,299)	(1,303)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	208	195
Piedmont
Deferred Tax Assets, Gross [Abstract]
Deferred credits and other liabilities	24	18
Lease obligations	3	4
Deferred Tax Assets, Tax Deferred Expense (Benefits), Compensation and Benefits	(2)	(8)
Tax credits and NOL carryforwards	37	29
Regulatory liabilities and deferred credits		6
Other	9	8
Total deferred income tax assets	71	57
Deferred Tax Liabilities, Gross [Abstract]
Investments and other assets	(28)	(39)
Accelerated depreciation rates	(892)	(833)
Regulatory assets and deferred debits, net	(21)
Total deferred income tax liabilities	(941)	(872)
Net deferred income tax liabilities	(870)	(815)
Components and Expiration Dates of Tax Credits and NOL Carryforwards [Abstract]
Tax credits and NOL carryforwards	$ 37	$ 29