Derivatives and Hedging (Location and Fair Value Amounts of Derivatives Reflected in the Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Derivatives, Fair Value [Line Items]
Gross amounts recognized	$ 836	$ 320
Location and fair value amounts of derivatives liabilities	437	328
Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	594	204
Noncurrent assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	242	116
Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	193	157
Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	244	171
Commodity Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	478	312
Location and fair value amounts of derivatives liabilities	377	204
Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	358	8
Location and fair value amounts of derivatives liabilities	2	124
Foreign Currency Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	58
Designated as Hedging Instruments | Interest Rate Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	101	3
Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized		3
Designated as Hedging Instruments | Interest Rate Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities		75
Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities		21
Designated as Hedging Instruments | Foreign Currency Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	18
Designated as Hedging Instruments | Foreign Currency Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	40
Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	265	199
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	213	113
Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	175	72
Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	202	132
Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	228	2
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	29
Not Designated as Hedging Instruments | Interest Rate Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities		10
Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	2	18
Duke Energy Carolinas
Derivatives, Fair Value [Line Items]
Gross amounts recognized	330	162
Location and fair value amounts of derivatives liabilities	127	35
Duke Energy Carolinas | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	226	99
Duke Energy Carolinas | Noncurrent assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	104	63
Duke Energy Carolinas | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	96	26
Duke Energy Carolinas | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	31	9
Duke Energy Carolinas | Commodity Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	236	162
Location and fair value amounts of derivatives liabilities	127	27
Duke Energy Carolinas | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	94
Location and fair value amounts of derivatives liabilities		8
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	132	99
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	104	63
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	96	18
Duke Energy Carolinas | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	31	9
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	94
Duke Energy Carolinas | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities		8
Progress Energy
Derivatives, Fair Value [Line Items]
Gross amounts recognized	248	124
Location and fair value amounts of derivatives liabilities	66	24
Progress Energy | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	140	74
Progress Energy | Noncurrent assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	108	50
Progress Energy | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	36	19
Progress Energy | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	30	5
Progress Energy | Commodity Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	207	122
Location and fair value amounts of derivatives liabilities	66	24
Progress Energy | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	41	2
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	99	72
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	108	50
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	36	19
Progress Energy | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	30	5
Progress Energy | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	41	2
Duke Energy Progress
Derivatives, Fair Value [Line Items]
Gross amounts recognized	230	124
Location and fair value amounts of derivatives liabilities	48	10
Duke Energy Progress | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	122	74
Duke Energy Progress | Noncurrent assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	108	50
Duke Energy Progress | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	18	5
Duke Energy Progress | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	30	5
Duke Energy Progress | Commodity Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	207	122
Location and fair value amounts of derivatives liabilities	48	10
Duke Energy Progress | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	23	2
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	99	72
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	108	50
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	18	5
Duke Energy Progress | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	30	5
Duke Energy Progress | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	23	2
Duke Energy Florida
Derivatives, Fair Value [Line Items]
Gross amounts recognized	17
Location and fair value amounts of derivatives liabilities	19	14
Duke Energy Florida | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	17
Duke Energy Florida | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	19	14
Duke Energy Florida | Commodity Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	19	14
Duke Energy Florida | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	17
Duke Energy Florida | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	19	14
Duke Energy Florida | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	17
Duke Energy Ohio
Derivatives, Fair Value [Line Items]
Gross amounts recognized	5	2
Location and fair value amounts of derivatives liabilities	2	5
Duke Energy Ohio | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	5	2
Duke Energy Ohio | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities		1
Duke Energy Ohio | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	2	4
Duke Energy Ohio | Commodity Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	5	2
Duke Energy Ohio | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	2	5
Duke Energy Ohio | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	5	2
Duke Energy Ohio | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities		1
Duke Energy Ohio | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	2	4
Duke Energy Indiana
Derivatives, Fair Value [Line Items]
Gross amounts recognized	110	23
Location and fair value amounts of derivatives liabilities	16	27
Duke Energy Indiana | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	110	23
Duke Energy Indiana | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	16	13
Duke Energy Indiana | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities		14
Duke Energy Indiana | Commodity Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	29	23
Location and fair value amounts of derivatives liabilities	16	13
Duke Energy Indiana | Interest Rate Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized	81
Location and fair value amounts of derivatives liabilities		14
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	29	23
Duke Energy Indiana | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	16	13
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized	81
Duke Energy Indiana | Not Designated as Hedging Instruments | Interest Rate Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities		14
Piedmont
Derivatives, Fair Value [Line Items]
Gross amounts recognized		3
Location and fair value amounts of derivatives liabilities	168	139
Piedmont | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized		3
Piedmont | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	27	21
Piedmont | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	141	118
Piedmont | Commodity Contracts
Derivatives, Fair Value [Line Items]
Gross amounts recognized		3
Location and fair value amounts of derivatives liabilities	168	139
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current Assets
Derivatives, Fair Value [Line Items]
Gross amounts recognized		3
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Current Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	27	21
Piedmont | Not Designated as Hedging Instruments | Commodity Contracts | Noncurrent Liabilities
Derivatives, Fair Value [Line Items]
Location and fair value amounts of derivatives liabilities	$ 141	$ 118