Revenue (Aging of Trade Receivables) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Feb. 29, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	$ 1,066		$ 1,273
Current	2,301		2,306
Deferred Payment Arrangements	115		104
Trade and Other Receivables	4,103		4,336
CRC | VIE primary beneficiary
Financing Receivable, Past Due [Line Items]
Accounts receivable from securitization	0	$ 682	663
30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	95		78
60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	46		47
Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	265		275
Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	215		253
Duke Energy Carolinas
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	361		399
Current	706		680
Deferred Payment Arrangements	40		34
Trade and Other Receivables	1,304		1,312
Duke Energy Carolinas | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	33		20
Duke Energy Carolinas | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	18		15
Duke Energy Carolinas | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	82		97
Duke Energy Carolinas | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	64		67
Progress Energy
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	361		401
Current	967		1,009
Deferred Payment Arrangements	39		43
Trade and Other Receivables	1,553		1,664
Progress Energy | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	33		34
Progress Energy | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	11		17
Progress Energy | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	85		91
Progress Energy | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	57		69
Duke Energy Progress
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	250		280
Current	586		612
Deferred Payment Arrangements	29		26
Trade and Other Receivables	968		1,016
Duke Energy Progress | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	24		23
Duke Energy Progress | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	8		10
Duke Energy Progress | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	50		41
Duke Energy Progress | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	21		24
Duke Energy Florida
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	111		121
Current	380		395
Deferred Payment Arrangements	10		17
Trade and Other Receivables	584		646
Duke Energy Florida | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	9		11
Duke Energy Florida | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	3		7
Duke Energy Florida | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	35		50
Duke Energy Florida | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	36		45
Duke Energy Ohio
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	113		4
Current	215		48
Deferred Payment Arrangements	28		6
Trade and Other Receivables	478		121
Duke Energy Ohio | CRC
Financing Receivable, Past Due [Line Items]
Unbilled Receivables			141
Duke Energy Ohio | CRC | VIE primary beneficiary
Financing Receivable, Past Due [Line Items]
Accounts receivable from securitization		366
Duke Energy Ohio | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	15		3
Duke Energy Ohio | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	7		2
Duke Energy Ohio | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	33		12
Duke Energy Ohio | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	67		46
Duke Energy Indiana
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	174		22
Current	192		87
Deferred Payment Arrangements	7		0
Trade and Other Receivables	445		161
Duke Energy Indiana | CRC
Financing Receivable, Past Due [Line Items]
Unbilled Receivables			197
Duke Energy Indiana | CRC | VIE primary beneficiary
Financing Receivable, Past Due [Line Items]
Accounts receivable from securitization		$ 316
Duke Energy Indiana | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	7		7
Duke Energy Indiana | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	3		4
Duke Energy Indiana | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	39		14
Duke Energy Indiana | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	23		27
Piedmont
Financing Receivable, Past Due [Line Items]
Unbilled Receivables	57		108
Current	208		199
Deferred Payment Arrangements	1		0
Trade and Other Receivables	309		322
Piedmont | 30-60 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	7		2
Piedmont | 60-90 days
Financing Receivable, Past Due [Line Items]
Trade and other receivables	7		1
Piedmont | Financial Asset, 1 to 29 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	25		9
Piedmont | Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Trade and other receivables	$ 4		$ 3