Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Allowance for doubtful accounts - receivables	$ 47	$ 40
Regulatory Assets: Current	3,760	3,485
Current Assets: Other	633	973
Other Noncurrent Assets: Regulatory assets	14,147	14,645
Other	3,444	3,400
Current maturities of long-term debt (includes amounts related to VIEs)	4,609	3,878
Long-term debt	$ 69,914	$ 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	$ 152	$ 176
Regulatory Assets: Current	107	106
Current Assets: Other	73	116
Other Noncurrent Assets: Regulatory assets	1,667	1,715
Other	45	52
Current maturities of long-term debt (includes amounts related to VIEs)	426	350
Long-term debt	$ 3,051	$ 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	$ 6	$ 3
Allowance for doubtful accounts - receivables of VIEs	51	65
Regulatory Assets: Current	1,483	1,095
Current Assets: Other	61	216
Other Noncurrent Assets: Regulatory assets	4,056	4,293
Other	1,005	1,036
Current maturities of long-term debt (includes amounts related to VIEs)	18	1,018
Long-term debt	15,648	12,948
Duke Energy Carolinas | VIEs
Regulatory Assets: Current	12	12
Current Assets: Other	8
Other Noncurrent Assets: Regulatory assets	202	208
Current maturities of long-term debt (includes amounts related to VIEs)	10	10
Long-term debt	701	689
Progress Energy
Allowance for doubtful accounts - receivables	15	13
Regulatory Assets: Current	1,927	1,833
Current Assets: Other	146	342
Other Noncurrent Assets: Regulatory assets	6,819	7,146
Other	1,105	1,066
Current maturities of long-term debt (includes amounts related to VIEs)	1,571	697
Long-term debt	$ 21,718	$ 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	$ 58	$ 68
Regulatory Assets: Current	95	95
Current Assets: Other	61	88
Other Noncurrent Assets: Regulatory assets	1,465	1,507
Current maturities of long-term debt (includes amounts related to VIEs)	416	340
Long-term debt	1,956	2,003
Duke Energy Progress
Allowance for doubtful accounts - receivables	6	4
Regulatory Assets: Current	888	690
Current Assets: Other	61	174
Other Noncurrent Assets: Regulatory assets	4,658	4,724
Other	651	650
Current maturities of long-term debt (includes amounts related to VIEs)	370	369
Long-term debt	11,521	10,568
Duke Energy Progress | VIEs
Allowance for doubtful accounts - receivables of VIEs	37	40
Regulatory Assets: Current	39	39
Current Assets: Other	25	42
Other Noncurrent Assets: Regulatory assets	662	681
Current maturities of long-term debt (includes amounts related to VIEs)	34	34
Long-term debt	1,096	1,114
Duke Energy Florida
Allowance for doubtful accounts - receivables	9	8
Regulatory Assets: Current	1,039	1,143
Current Assets: Other	100	108
Other Noncurrent Assets: Regulatory assets	2,161	2,422
Other	409	372
Current maturities of long-term debt (includes amounts related to VIEs)	1,201	328
Long-term debt	8,554	9,381
Duke Energy Florida | VIEs
Allowance for doubtful accounts - receivables of VIEs	21	28
Regulatory Assets: Current	56	55
Current Assets: Other	36	46
Other Noncurrent Assets: Regulatory assets	803	826
Current maturities of long-term debt (includes amounts related to VIEs)	382	306
Long-term debt	859	890
Duke Energy Ohio
Allowance for doubtful accounts - receivables	8	6
Regulatory Assets: Current	47	103
Current Assets: Other	44	86
Other Noncurrent Assets: Regulatory assets	651	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	97	249
Current Assets: Other	90	197
Other Noncurrent Assets: Regulatory assets	896	875
Other	278	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	13	14
Regulatory Assets: Current	121	119
Current Assets: Other	57	4
Other Noncurrent Assets: Regulatory assets	401	392
Other	280	272
Current maturities of long-term debt (includes amounts related to VIEs)	45	45
Long-term debt	$ 3,667	$ 3,318
Common stock, shares authorized (in shares)	100	100
Common stock, shares outstanding (in shares)	100	100