Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Allowance for doubtful accounts - receivables	$ 45	$ 40
Regulatory Assets: Current	3,502	3,485
Current Assets: Other	452	973
Other Noncurrent Assets: Regulatory assets	14,702	14,645
Other	3,426	3,400
Current maturities of long-term debt (includes amounts related to VIEs)	3,330	3,878
Long-term debt	$ 69,107	$ 65,873
Common stock, par value (in usd per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	2,000,000,000	2,000,000,000
Common stock, shares outstanding (in shares)	771,000,000	770,000,000
VIEs
Allowance for doubtful accounts - receivables of VIEs	$ 169	$ 176
Regulatory Assets: Current	106
Current Assets: Other	42	116
Other Noncurrent Assets: Regulatory assets	1,691	1,715
Other	50	52
Current maturities of long-term debt (includes amounts related to VIEs)	101	350
Long-term debt	$ 3,334	$ 3,108
Preferred stock, Series A
Preferred stock, par value (in usd per share)	$ 0.001	$ 0.001
Preferred stock, depositary shares authorized (in shares)	40,000,000	40,000,000
Preferred stock, depositary shares outstanding (in shares)	40,000,000	40,000,000
Preferred stock, Series B
Preferred stock, par value (in usd per share)	$ 0.001	$ 0.001
Preferred stock, depositary shares authorized (in shares)	1,000,000	1,000,000
Preferred stock, depositary shares outstanding (in shares)	1,000,000	1,000,000
Duke Energy Carolinas
Allowance for doubtful accounts - receivables	$ 5	$ 3
Allowance for doubtful accounts - receivables of VIEs	65
Regulatory Assets: Current	1,311	1,095
Current Assets: Other	62	216
Other Noncurrent Assets: Regulatory assets	4,309	4,293
Other	998	1,036
Current maturities of long-term debt (includes amounts related to VIEs)	18	1,018
Long-term debt	14,787	12,948
Duke Energy Carolinas | VIEs
Regulatory Assets: Current	12	12
Current Assets: Other	5	8
Other Noncurrent Assets: Regulatory assets	205	208
Current maturities of long-term debt (includes amounts related to VIEs)	10
Long-term debt	713	689
Progress Energy
Allowance for doubtful accounts - receivables	14	13
Regulatory Assets: Current	1,548	1,833
Current Assets: Other	166	342
Other Noncurrent Assets: Regulatory assets	7,422	7,146
Other	1,097	1,066
Current maturities of long-term debt (includes amounts related to VIEs)	699	697
Long-term debt	$ 22,522	$ 21,592
Common stock, par value (in usd per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	100	100
Common stock, shares outstanding (in shares)	100	100
Progress Energy | VIEs
Allowance for doubtful accounts - receivables of VIEs	$ 61	$ 68
Regulatory Assets: Current	94	94
Current Assets: Other	33	88
Other Noncurrent Assets: Regulatory assets	1,486	1,507
Current maturities of long-term debt (includes amounts related to VIEs)	341	340
Long-term debt	1,955	2,003
Duke Energy Progress
Allowance for doubtful accounts - receivables	5	4
Regulatory Assets: Current	764	690
Current Assets: Other	57	174
Other Noncurrent Assets: Regulatory assets	4,817	4,724
Other	659	650
Current maturities of long-term debt (includes amounts related to VIEs)	370	369
Long-term debt	11,527	10,568
Duke Energy Progress | VIEs
Allowance for doubtful accounts - receivables of VIEs	40
Regulatory Assets: Current	39	39
Current Assets: Other	15	42
Other Noncurrent Assets: Regulatory assets	672	681
Current maturities of long-term debt (includes amounts related to VIEs)	34
Long-term debt	1,096	1,114
Duke Energy Florida
Allowance for doubtful accounts - receivables	9	8
Regulatory Assets: Current	784	1,143
Current Assets: Other	67	108
Other Noncurrent Assets: Regulatory assets	2,605	2,422
Other	393	372
Current maturities of long-term debt (includes amounts related to VIEs)	330	328
Long-term debt	9,353	9,381
Duke Energy Florida | VIEs
Allowance for doubtful accounts - receivables of VIEs	21	28
Regulatory Assets: Current	55
Current Assets: Other	18	46
Other Noncurrent Assets: Regulatory assets	814	826
Current maturities of long-term debt (includes amounts related to VIEs)	307	306
Long-term debt	859	890
Duke Energy Ohio
Allowance for doubtful accounts - receivables	7	6
Regulatory Assets: Current	54	103
Current Assets: Other	33	86
Other Noncurrent Assets: Regulatory assets	623	581
Other	74	71
Current maturities of long-term debt (includes amounts related to VIEs)	475	475
Long-term debt	$ 3,491	$ 2,745
Common stock, par value (in usd per share)	$ 8.50	$ 8.50
Common stock, shares authorized (in shares)	120,000,000	120,000,000
Common stock, shares outstanding (in shares)	90,000,000	90,000,000
Duke Energy Indiana
Allowance for doubtful accounts - receivables	$ 4	$ 4
Regulatory Assets: Current	91	249
Current Assets: Other	64	197
Other Noncurrent Assets: Regulatory assets	903	875
Other	265	254
Current maturities of long-term debt (includes amounts related to VIEs)	3	303
Long-term debt	4,350	3,854
Piedmont
Allowance for doubtful accounts - receivables	14	14
Regulatory Assets: Current	121	119
Current Assets: Other	9	4
Other Noncurrent Assets: Regulatory assets	389	392
Other	278	272
Current maturities of long-term debt (includes amounts related to VIEs)	45	45
Long-term debt	$ 3,319	$ 3,318
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares outstanding (in shares)	100,000,000	100,000,000