Derivatives and Hedging (Location and Fair Value Amounts of Derivatives Reflected in the Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Derivatives, Fair Value [Line Items]
Total Derivative Assets	$ 189	$ 795
Total Derivative Liabilities	729	437
Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	61	582
Noncurrent assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	128	213
Current Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	409	193
Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	320	244
Commodity Contracts
Derivatives, Fair Value [Line Items]
Total Derivative Assets	82	478
Total Derivative Liabilities	609	377
Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Total Derivative Assets	63	317
Total Derivative Liabilities	103	2
Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	17	58
Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Total Derivative Assets	44
Foreign Currency Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	44
Designated as Hedging Instruments | Interest Rate Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	31	101
Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	17
Designated as Hedging Instruments | Interest Rate Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	25
Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	26
Designated as Hedging Instruments | Foreign Currency Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	17
Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities		40
Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	25	265
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	57	213
Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	354	175
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	255	202
Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	5	216
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	10
Not Designated as Hedging Instruments | Interest Rate Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	13
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	39	2
Not Designated as Hedging Instruments | Foreign Currency Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities		18
Duke Energy Carolinas
Derivatives, Fair Value [Line Items]
Total Derivative Assets	35	330
Total Derivative Liabilities	260	127
Duke Energy Carolinas | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	6	226
Duke Energy Carolinas | Noncurrent assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	29	104
Duke Energy Carolinas | Current Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	179	96
Duke Energy Carolinas | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	81	31
Duke Energy Carolinas | Commodity Contracts
Derivatives, Fair Value [Line Items]
Total Derivative Assets	27	236
Total Derivative Liabilities	244	127
Duke Energy Carolinas | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Total Derivative Assets	8	94
Total Derivative Liabilities	16
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	1	132
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	26	104
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	177	96
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	67	31
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	5	94
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	3
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	2
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	14
Progress Energy
Derivatives, Fair Value [Line Items]
Total Derivative Assets	34	248
Total Derivative Liabilities	234	66
Progress Energy | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	3	140
Progress Energy | Noncurrent assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	31	108
Progress Energy | Current Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	149	36
Progress Energy | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	85	30
Progress Energy | Commodity Contracts
Derivatives, Fair Value [Line Items]
Total Derivative Assets	34	207
Total Derivative Liabilities	199	66
Progress Energy | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Total Derivative Assets		41
Total Derivative Liabilities	35
Progress Energy | Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities		0
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	3	99
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	31	108
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	138	36
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	61	30
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets		41
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	11
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	24
Duke Energy Progress
Derivatives, Fair Value [Line Items]
Total Derivative Assets	32	230
Total Derivative Liabilities	219	48
Duke Energy Progress | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	1	122
Duke Energy Progress | Noncurrent assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	31	108
Duke Energy Progress | Current Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	149	18
Duke Energy Progress | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	70	30
Duke Energy Progress | Commodity Contracts
Derivatives, Fair Value [Line Items]
Total Derivative Assets	32	207
Total Derivative Liabilities	199	48
Duke Energy Progress | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Total Derivative Assets		23
Total Derivative Liabilities	20
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	1	99
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	31	108
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	138	18
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	61	30
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets		23
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	11
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	9
Duke Energy Florida
Derivatives, Fair Value [Line Items]
Total Derivative Assets	2	17
Total Derivative Liabilities	15	19
Duke Energy Florida | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	2	17
Duke Energy Florida | Current Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities		19
Duke Energy Florida | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	15
Duke Energy Florida | Commodity Contracts
Derivatives, Fair Value [Line Items]
Total Derivative Assets	2
Total Derivative Liabilities		19
Duke Energy Florida | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Total Derivative Assets		17
Total Derivative Liabilities	15
Duke Energy Florida | Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities		0
Duke Energy Florida | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	2
Duke Energy Florida | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities		19
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets		17
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	15
Duke Energy Ohio
Derivatives, Fair Value [Line Items]
Total Derivative Assets	1	5
Total Derivative Liabilities	1	2
Duke Energy Ohio | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	1	5
Duke Energy Ohio | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	1	2
Duke Energy Ohio | Commodity Contracts
Derivatives, Fair Value [Line Items]
Total Derivative Assets	1	5
Duke Energy Ohio | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	1	2
Duke Energy Ohio | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	1	5
Duke Energy Ohio | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	1	2
Duke Energy Indiana
Derivatives, Fair Value [Line Items]
Total Derivative Assets	25	110
Total Derivative Liabilities	18	16
Duke Energy Indiana | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	18	110
Duke Energy Indiana | Noncurrent assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	7
Duke Energy Indiana | Current Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	18	16
Duke Energy Indiana | Commodity Contracts
Derivatives, Fair Value [Line Items]
Total Derivative Assets	18	29
Total Derivative Liabilities	18	16
Duke Energy Indiana | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Total Derivative Assets	7	81
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	18	29
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	18	16
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets		81
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	7
Piedmont
Derivatives, Fair Value [Line Items]
Total Derivative Assets	1
Total Derivative Liabilities	147	168
Piedmont | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	1
Piedmont | Current Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	20	27
Piedmont | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	127	141
Piedmont | Commodity Contracts
Derivatives, Fair Value [Line Items]
Total Derivative Assets	1
Total Derivative Liabilities	147	168
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Total Derivative Assets	1
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	20	27
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Total Derivative Liabilities	$ 127	$ 141