Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Current Assets
Cash and cash equivalents	$ 548	$ 259
Receivables of VIEs (net of allowance for doubtful accounts)	998	1,009
Receivables (net of allowance for doubtful accounts)	2,431	2,144
Inventory	2,900	3,167
Regulatory assets (includes amounts related to VIEs)	1,791	1,641
Other (includes amounts related to VIEs)	768	462
Total current assets	9,436	8,682
Property, Plant and Equipment
Cost	160,652	155,580
Accumulated depreciation and amortization	(50,543)	(48,827)
Facilities to be retired, net	127	29
Net property, plant and equipment	110,236	106,782
Other Noncurrent Assets
Goodwill	19,303	19,303
Regulatory assets (includes amounts related to VIEs)	12,247	12,421
Nuclear decommissioning trust funds	9,861	9,114
Operating lease right-of-use assets, net	1,287	1,524
Investments in equity method unconsolidated affiliates	951	961
Other (includes amounts related to VIEs)	3,686	3,601
Total other noncurrent assets	47,335	46,924
Total Assets	167,007	162,388
Current Liabilities
Accounts payable	2,888	3,144
Notes payable and commercial paper	2,098	2,873
Taxes accrued	908	482
Interest accrued	558	537
Current maturities of long-term debt (includes amounts related to VIEs)	4,873	4,238
Asset retirement obligations	673	718
Regulatory liabilities	1,319	1,377
Other	2,239	2,936
Total current liabilities	15,556	16,305
Long-Term Debt (includes amounts related to VIEs)	57,929	55,625
Other Noncurrent Liabilities
Deferred income taxes	9,875	9,244
Asset retirement obligations	12,278	12,286
Regulatory liabilities	15,530	15,029
Operating lease liabilities	1,093	1,340
Accrued pension and other post-retirement benefit costs	988	969
Investment tax credits	804	687
Other (includes amounts related to VIEs)	1,714	1,719
Total other noncurrent liabilities	42,282	41,274
Commitments and Contingencies
Equity
Common stock	1	1
Additional paid-in capital	44,348	43,767
Retained earnings	3,293	2,471
Accumulated other comprehensive loss	(297)	(237)
Total Duke Energy Corporation stockholders' equity	49,307	47,964
Noncontrolling interests	1,933	1,220
Total equity	51,240	49,184
Total Liabilities and Equity	167,007	162,388
Variable Interest Entity
Current Assets
Regulatory assets (includes amounts related to VIEs)	54	53
Other (includes amounts related to VIEs)	347	296
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	896	937
Other (includes amounts related to VIEs)	134	81
Current Liabilities
Current maturities of long-term debt (includes amounts related to VIEs)	221	472
Long-Term Debt (includes amounts related to VIEs)	3,923	3,535
Other Noncurrent Liabilities
Other (includes amounts related to VIEs)	341	316
Duke Energy Carolinas
Current Assets
Cash and cash equivalents	21	21
Receivables of VIEs (net of allowance for doubtful accounts)	915	696
Receivables (net of allowance for doubtful accounts)	278	247
Receivables from affiliated companies	85	124
Inventory	969	1,010
Regulatory assets (includes amounts related to VIEs)	460	473
Other (includes amounts related to VIEs)	104	20
Total current assets	2,832	2,591
Property, Plant and Equipment
Cost	51,790	50,640
Accumulated depreciation and amortization	(17,959)	(17,453)
Facilities to be retired, net	89
Net property, plant and equipment	33,920	33,187
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	2,743	2,996
Nuclear decommissioning trust funds	5,434	4,977
Operating lease right-of-use assets, net	95	110
Other (includes amounts related to VIEs)	1,197	1,187
Total other noncurrent assets	9,469	9,270
Total Assets	46,221	45,048
Current Liabilities
Accounts payable	673	1,000
Accounts payable to affiliated companies	184	199
Notes payable to affiliated companies	86	506
Taxes accrued	391	76
Interest accrued	137	117
Current maturities of long-term debt (includes amounts related to VIEs)	357	506
Asset retirement obligations	245	264
Regulatory liabilities	503	473
Other	516	546
Total current liabilities	3,092	3,687
Long-Term Debt (includes amounts related to VIEs)	12,318	11,412
Long-Term Debt Payable to Affiliated Companies	300	300
Other Noncurrent Liabilities
Deferred income taxes	3,893	3,842
Asset retirement obligations	5,134	5,086
Regulatory liabilities	6,867	6,535
Operating lease liabilities	83	97
Accrued pension and other post-retirement benefit costs	64	73
Investment tax credits	288	236
Other (includes amounts related to VIEs)	558	626
Total other noncurrent liabilities	16,887	16,495
Commitments and Contingencies
Equity
Member's equity	13,631	13,161
Accumulated other comprehensive loss	(7)	(7)
Member's Equity	13,624	13,154
Total Liabilities and Equity	46,221	45,048
Progress Energy
Current Assets
Cash and cash equivalents	102	59
Receivables of VIEs (net of allowance for doubtful accounts)	981	901
Receivables (net of allowance for doubtful accounts)	268	228
Receivables from affiliated companies	61	157
Inventory	1,255	1,375
Regulatory assets (includes amounts related to VIEs)	864	758
Other (includes amounts related to VIEs)	178	109
Total current assets	3,709	3,587
Property, Plant and Equipment
Cost	59,976	57,892
Accumulated depreciation and amortization	(19,211)	(18,368)
Facilities to be retired, net	27	29
Net property, plant and equipment	40,792	39,553
Other Noncurrent Assets
Goodwill	3,655	3,655
Regulatory assets (includes amounts related to VIEs)	5,785	5,775
Nuclear decommissioning trust funds	4,427	4,137
Operating lease right-of-use assets, net	714	690
Other (includes amounts related to VIEs)	1,175	1,227
Total other noncurrent assets	15,756	15,484
Total Assets	60,257	58,624
Current Liabilities
Accounts payable	898	919
Accounts payable to affiliated companies	221	289
Notes payable to affiliated companies	3,123	2,969
Taxes accrued	284	121
Interest accrued	175	202
Current maturities of long-term debt (includes amounts related to VIEs)	1,932	1,426
Asset retirement obligations	234	283
Regulatory liabilities	541	640
Other	856	793
Total current liabilities	8,264	7,642
Long-Term Debt (includes amounts related to VIEs)	17,406	17,688
Long-Term Debt Payable to Affiliated Companies	150	150
Other Noncurrent Liabilities
Deferred income taxes	4,784	4,396
Asset retirement obligations	5,850	5,866
Regulatory liabilities	5,335	5,051
Operating lease liabilities	623	623
Accrued pension and other post-retirement benefit costs	490	505
Other (includes amounts related to VIEs)	473	462
Total other noncurrent liabilities	17,555	16,903
Commitments and Contingencies
Equity
Additional paid-in capital	9,149	9,143
Retained earnings	7,743	7,109
Accumulated other comprehensive loss	(13)	(15)
Total Duke Energy Corporation stockholders' equity	16,879	16,237
Noncontrolling interests	3	4
Total equity	16,882	16,241
Total Liabilities and Equity	60,257	58,624
Progress Energy \| Variable Interest Entity
Current Assets
Regulatory assets (includes amounts related to VIEs)	54	53
Other (includes amounts related to VIEs)	17	39
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	896	937
Current Liabilities
Current maturities of long-term debt (includes amounts related to VIEs)	56	305
Long-Term Debt (includes amounts related to VIEs)	1,546	1,252
Duke Energy Progress
Current Assets
Cash and cash equivalents	51	39
Receivables of VIEs (net of allowance for doubtful accounts)	532	500
Receivables (net of allowance for doubtful accounts)	162	132
Receivables from affiliated companies	68	50
Inventory	815	911
Regulatory assets (includes amounts related to VIEs)	499	492
Other (includes amounts related to VIEs)	116	60
Total current assets	2,243	2,184
Property, Plant and Equipment
Cost	36,666	35,759
Accumulated depreciation and amortization	(13,365)	(12,801)
Facilities to be retired, net	27	29
Net property, plant and equipment	23,328	22,987
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	3,955	3,976
Nuclear decommissioning trust funds	3,857	3,500
Operating lease right-of-use assets, net	402	346
Other (includes amounts related to VIEs)	772	740
Total other noncurrent assets	8,986	8,562
Total Assets	34,557	33,733
Current Liabilities
Accounts payable	392	454
Accounts payable to affiliated companies	113	215
Notes payable to affiliated companies	117	295
Taxes accrued	163	85
Interest accrued	68	99
Current maturities of long-term debt (includes amounts related to VIEs)	1,207	603
Asset retirement obligations	234	283
Regulatory liabilities	439	530
Other	442	411
Total current liabilities	3,175	2,975
Long-Term Debt (includes amounts related to VIEs)	8,491	8,505
Long-Term Debt Payable to Affiliated Companies	150	150
Other Noncurrent Liabilities
Deferred income taxes	2,488	2,298
Asset retirement obligations	5,407	5,352
Regulatory liabilities	4,685	4,394
Operating lease liabilities	359	323
Accrued pension and other post-retirement benefit costs	234	242
Investment tax credits	129	132
Other (includes amounts related to VIEs)	79	102
Total other noncurrent liabilities	13,381	12,843
Commitments and Contingencies
Equity
Member's Equity	9,360	9,260
Total Liabilities and Equity	34,557	33,733
Duke Energy Florida
Current Assets
Cash and cash equivalents	40	11
Receivables of VIEs (net of allowance for doubtful accounts)	449	401
Receivables (net of allowance for doubtful accounts)	104	94
Receivables from affiliated companies	3	3
Inventory	439	464
Regulatory assets (includes amounts related to VIEs)	365	265
Other (includes amounts related to VIEs)	35	41
Total current assets	1,435	1,279
Property, Plant and Equipment
Cost	23,300	22,123
Accumulated depreciation and amortization	(5,839)	(5,560)
Net property, plant and equipment	17,461	16,563
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	1,829	1,799
Nuclear decommissioning trust funds	570	637
Operating lease right-of-use assets, net	312	344
Other (includes amounts related to VIEs)	351	335
Total other noncurrent assets	3,062	3,115
Total Assets	21,958	20,957
Current Liabilities
Accounts payable	506	465
Accounts payable to affiliated companies	129	85
Notes payable to affiliated companies	603	196
Taxes accrued	177	82
Interest accrued	72	69
Current maturities of long-term debt (includes amounts related to VIEs)	276	823
Regulatory liabilities	102	110
Other	403	374
Total current liabilities	2,268	2,204
Long-Term Debt (includes amounts related to VIEs)	7,273	7,092
Other Noncurrent Liabilities
Deferred income taxes	2,382	2,191
Asset retirement obligations	443	514
Regulatory liabilities	649	658
Operating lease liabilities	265	300
Accrued pension and other post-retirement benefit costs	225	231
Other (includes amounts related to VIEs)	265	209
Total other noncurrent liabilities	4,229	4,103
Commitments and Contingencies
Equity
Member's equity	8,190	7,560
Accumulated other comprehensive loss	(2)	(2)
Member's Equity	8,188	7,558
Total Liabilities and Equity	21,958	20,957
Duke Energy Florida \| Variable Interest Entity
Current Assets
Regulatory assets (includes amounts related to VIEs)	54	53
Other (includes amounts related to VIEs)	17	39
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	896	937
Current Liabilities
Current maturities of long-term debt (includes amounts related to VIEs)	56	305
Long-Term Debt (includes amounts related to VIEs)	1,196	1,002
Duke Energy Ohio
Current Assets
Cash and cash equivalents	16	14
Receivables (net of allowance for doubtful accounts)	107	98
Receivables from affiliated companies	77	102
Inventory	114	110
Regulatory assets (includes amounts related to VIEs)	61	39
Other (includes amounts related to VIEs)	45	31
Total current assets	420	394
Property, Plant and Equipment
Cost	11,531	11,022
Accumulated depreciation and amortization	(3,102)	(3,013)
Net property, plant and equipment	8,429	8,009
Other Noncurrent Assets
Goodwill	920	920
Regulatory assets (includes amounts related to VIEs)	634	610
Operating lease right-of-use assets, net	19	20
Other (includes amounts related to VIEs)	83	72
Total other noncurrent assets	1,656	1,622
Total Assets	10,505	10,025
Current Liabilities
Accounts payable	304	279
Accounts payable to affiliated companies	59	68
Notes payable to affiliated companies	451	169
Taxes accrued	210	247
Interest accrued	32	31
Current maturities of long-term debt (includes amounts related to VIEs)	50	50
Asset retirement obligations	17	3
Regulatory liabilities	63	65
Other	68	70
Total current liabilities	1,254	982
Long-Term Debt (includes amounts related to VIEs)	3,017	3,014
Long-Term Debt Payable to Affiliated Companies	25	25
Other Noncurrent Liabilities
Deferred income taxes	1,032	981
Asset retirement obligations	95	108
Regulatory liabilities	734	748
Operating lease liabilities	19	20
Accrued pension and other post-retirement benefit costs	114	113
Other (includes amounts related to VIEs)	92	99
Total other noncurrent liabilities	2,086	2,069
Commitments and Contingencies
Equity
Common stock	762	762
Additional paid-in capital	2,776	2,776
Retained earnings	585	397
Total Duke Energy Corporation stockholders' equity	4,123	3,935
Total Liabilities and Equity	10,505	10,025
Duke Energy Indiana
Current Assets
Cash and cash equivalents	14	7
Receivables (net of allowance for doubtful accounts)	81	55
Receivables from affiliated companies	62	112
Notes receivable from affiliated companies	252
Inventory	367	473
Regulatory assets (includes amounts related to VIEs)	196	125
Other (includes amounts related to VIEs)	59	37
Total current assets	1,031	809
Property, Plant and Equipment
Cost	17,320	17,382
Accumulated depreciation and amortization	(5,550)	(5,661)
Net property, plant and equipment	11,770	11,721
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	1,300	1,203
Operating lease right-of-use assets, net	51	55
Other (includes amounts related to VIEs)	276	253
Total other noncurrent assets	1,627	1,511
Total Assets	14,428	14,041
Current Liabilities
Accounts payable	239	188
Accounts payable to affiliated companies	198	88
Notes payable to affiliated companies		131
Taxes accrued	83	62
Interest accrued	59	51
Current maturities of long-term debt (includes amounts related to VIEs)	151	70
Asset retirement obligations	177	168
Regulatory liabilities	147	111
Other	104	83
Total current liabilities	1,158	952
Long-Term Debt (includes amounts related to VIEs)	3,791	3,871
Long-Term Debt Payable to Affiliated Companies	150	150
Other Noncurrent Liabilities
Deferred income taxes	1,289	1,228
Asset retirement obligations	966	1,008
Regulatory liabilities	1,573	1,627
Operating lease liabilities	49	53
Accrued pension and other post-retirement benefit costs	172	171
Investment tax credits	172	168
Other (includes amounts related to VIEs)	53	30
Total other noncurrent liabilities	4,274	4,285
Commitments and Contingencies
Equity
Member's Equity	5,055	4,783
Total Liabilities and Equity	14,428	14,041
Piedmont
Current Assets
Receivables (net of allowance for doubtful accounts)	96	250
Receivables from affiliated companies	11	10
Inventory	68	68
Regulatory assets (includes amounts related to VIEs)	125	153
Other (includes amounts related to VIEs)	59	20
Total current assets	359	501
Property, Plant and Equipment
Cost	9,733	9,134
Accumulated depreciation and amortization	(1,862)	(1,749)
Facilities to be retired, net	11
Net property, plant and equipment	7,882	7,385
Other Noncurrent Assets
Goodwill	49	49
Regulatory assets (includes amounts related to VIEs)	335	302
Operating lease right-of-use assets, net	17	20
Investments in equity method unconsolidated affiliates	100	88
Other (includes amounts related to VIEs)	282	270
Total other noncurrent assets	783	729
Total Assets	9,024	8,615
Current Liabilities
Accounts payable	184	230
Accounts payable to affiliated companies	31	79
Notes payable to affiliated companies	315	530
Taxes accrued	41	23
Interest accrued	35	34
Current maturities of long-term debt (includes amounts related to VIEs)		160
Regulatory liabilities	64	88
Other	76	69
Total current liabilities	746	1,213
Long-Term Debt (includes amounts related to VIEs)	2,968	2,620
Other Noncurrent Liabilities
Deferred income taxes	875	821
Asset retirement obligations	21	20
Regulatory liabilities	1,004	1,044
Operating lease liabilities	15	19
Accrued pension and other post-retirement benefit costs	6	8
Other (includes amounts related to VIEs)	175	155
Total other noncurrent liabilities	2,096	2,067
Commitments and Contingencies
Equity
Common stock	1,635	1,310
Retained earnings	1,579	1,405
Total Duke Energy Corporation stockholders' equity	3,214	2,715
Total Liabilities and Equity	9,024	8,615
Preferred stock, Series A
Equity
Preferred stock	973	973
Preferred stock, Series B
Equity
Preferred stock	$ 989	$ 989

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