Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Current Assets
Cash and cash equivalents	$ 367	$ 259
Receivables of VIEs (net of allowance for doubtful accounts)	868	1,009
Receivables (net of allowance for doubtful accounts)	2,220	2,144
Inventory	3,015	3,167
Regulatory assets (includes amounts related to VIEs)	1,793	1,641
Other (includes amounts related to VIEs)	722	462
Total current assets	8,985	8,682
Property, Plant and Equipment
Cost	158,272	155,580
Accumulated depreciation and amortization	(49,752)	(48,827)
Facilities to be retired, net	121	29
Net property, plant and equipment	108,641	106,782
Other Noncurrent Assets
Goodwill	19,303	19,303
Regulatory assets (includes amounts related to VIEs)	12,485	12,421
Nuclear decommissioning trust funds	9,886	9,114
Operating lease right-of-use assets, net	1,495	1,524
Investments in equity method unconsolidated affiliates	938	961
Other (includes amounts related to VIEs)	3,652	3,601
Total other noncurrent assets	47,759	46,924
Total Assets	165,385	162,388
Current Liabilities
Accounts payable	2,716	3,144
Notes payable and commercial paper	3,296	2,873
Taxes accrued	692	482
Interest accrued	537	537
Current maturities of long-term debt (includes amounts related to VIEs)	4,976	4,238
Asset retirement obligations	691	718
Regulatory liabilities	1,309	1,377
Other	1,994	2,936
Total current liabilities	16,211	16,305
Long-Term Debt (includes amounts related to VIEs)	57,410	55,625
Other Noncurrent Liabilities
Deferred income taxes	9,644	9,244
Asset retirement obligations	12,272	12,286
Regulatory liabilities	15,414	15,029
Operating lease liabilities	1,315	1,340
Accrued pension and other post-retirement benefit costs	995	969
Investment tax credits	770	687
Other (includes amounts related to VIEs)	1,809	1,719
Total other noncurrent liabilities	42,219	41,274
Commitments and Contingencies
Equity
Common stock	1	1
Additional paid-in capital	43,788	43,767
Retained earnings	2,687	2,471
Accumulated other comprehensive loss	(306)	(237)
Total Duke Energy Corporation stockholders' equity	48,132	47,964
Noncontrolling interests	1,413	1,220
Total equity	49,545	49,184	$ 46,611
Total Liabilities and Equity	165,385	162,388
Variable Interest Entity
Current Assets
Regulatory assets (includes amounts related to VIEs)	54	53
Other (includes amounts related to VIEs)	356	296
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	914	937
Other (includes amounts related to VIEs)	89	81
Current Liabilities
Current maturities of long-term debt (includes amounts related to VIEs)	219	472
Long-Term Debt (includes amounts related to VIEs)	3,796	3,535
Other Noncurrent Liabilities
Other (includes amounts related to VIEs)	352	316
Duke Energy Carolinas
Current Assets
Cash and cash equivalents	36	21
Receivables of VIEs (net of allowance for doubtful accounts)	769	696
Receivables (net of allowance for doubtful accounts)	180	247
Receivables from affiliated companies	111	124
Inventory	1,013	1,010
Regulatory assets (includes amounts related to VIEs)	458	473
Other (includes amounts related to VIEs)	88	20
Total current assets	2,655	2,591
Property, Plant and Equipment
Cost	51,220	50,640
Accumulated depreciation and amortization	(17,709)	(17,453)
Facilities to be retired, net	93
Net property, plant and equipment	33,604	33,187
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	2,970	2,996
Nuclear decommissioning trust funds	5,446	4,977
Operating lease right-of-use assets, net	100	110
Other (includes amounts related to VIEs)	1,238	1,187
Total other noncurrent assets	9,754	9,270
Total Assets	46,013	45,048
Current Liabilities
Accounts payable	675	1,000
Accounts payable to affiliated companies	195	199
Notes payable to affiliated companies	471	506
Taxes accrued	203	76
Interest accrued	125	117
Current maturities of long-term debt (includes amounts related to VIEs)	356	506
Asset retirement obligations	251	264
Regulatory liabilities	489	473
Other	425	546
Total current liabilities	3,190	3,687
Long-Term Debt (includes amounts related to VIEs)	12,250	11,412
Long-Term Debt Payable to Affiliated Companies	300	300
Other Noncurrent Liabilities
Deferred income taxes	3,937	3,842
Asset retirement obligations	5,116	5,086
Regulatory liabilities	6,810	6,535
Operating lease liabilities	87	97
Accrued pension and other post-retirement benefit costs	67	73
Investment tax credits	259	236
Other (includes amounts related to VIEs)	605	626
Total other noncurrent liabilities	16,881	16,495
Commitments and Contingencies
Equity
Member's equity	13,399	13,161
Accumulated other comprehensive loss	(7)	(7)
Member's Equity	13,392	13,154	13,072
Total Liabilities and Equity	46,013	45,048
Progress Energy
Current Assets
Cash and cash equivalents	75	59
Receivables of VIEs (net of allowance for doubtful accounts)	924	901
Receivables (net of allowance for doubtful accounts)	223	228
Receivables from affiliated companies	69	157
Inventory	1,299	1,375
Regulatory assets (includes amounts related to VIEs)	909	758
Other (includes amounts related to VIEs)	270	109
Total current assets	3,769	3,587
Property, Plant and Equipment
Cost	59,234	57,892
Accumulated depreciation and amortization	(18,887)	(18,368)
Facilities to be retired, net	28	29
Net property, plant and equipment	40,375	39,553
Other Noncurrent Assets
Goodwill	3,655	3,655
Regulatory assets (includes amounts related to VIEs)	5,757	5,775
Nuclear decommissioning trust funds	4,440	4,137
Operating lease right-of-use assets, net	700	690
Other (includes amounts related to VIEs)	1,115	1,227
Total other noncurrent assets	15,667	15,484
Total Assets	59,811	58,624
Current Liabilities
Accounts payable	903	919
Accounts payable to affiliated companies	331	289
Notes payable to affiliated companies	3,003	2,969
Taxes accrued	217	121
Interest accrued	191	202
Current maturities of long-term debt (includes amounts related to VIEs)	2,831	1,426
Asset retirement obligations	251	283
Regulatory liabilities	558	640
Other	814	793
Total current liabilities	9,099	7,642
Long-Term Debt (includes amounts related to VIEs)	16,269	17,688
Long-Term Debt Payable to Affiliated Companies	150	150
Other Noncurrent Liabilities
Deferred income taxes	4,655	4,396
Asset retirement obligations	5,853	5,866
Regulatory liabilities	5,244	5,051
Operating lease liabilities	634	623
Accrued pension and other post-retirement benefit costs	496	505
Other (includes amounts related to VIEs)	469	462
Total other noncurrent liabilities	17,351	16,903
Commitments and Contingencies
Equity
Additional paid-in capital	9,143	9,143
Retained earnings	7,809	7,109
Accumulated other comprehensive loss	(13)	(15)
Total Duke Energy Corporation stockholders' equity	16,939	16,237
Noncontrolling interests	3	4
Total equity	16,942	16,241	16,221
Total Liabilities and Equity	59,811	58,624
Progress Energy \| Variable Interest Entity
Current Assets
Regulatory assets (includes amounts related to VIEs)	54	53
Other (includes amounts related to VIEs)	33	39
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	914	937
Current Liabilities
Current maturities of long-term debt (includes amounts related to VIEs)	55	305
Long-Term Debt (includes amounts related to VIEs)	1,492	1,252
Duke Energy Progress
Current Assets
Cash and cash equivalents	46	39
Receivables of VIEs (net of allowance for doubtful accounts)	473	500
Receivables (net of allowance for doubtful accounts)	129	132
Receivables from affiliated companies	63	50
Inventory	858	911
Regulatory assets (includes amounts related to VIEs)	502	492
Other (includes amounts related to VIEs)	141	60
Total current assets	2,212	2,184
Property, Plant and Equipment
Cost	36,291	35,759
Accumulated depreciation and amortization	(13,134)	(12,801)
Facilities to be retired, net	28	29
Net property, plant and equipment	23,185	22,987
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	4,056	3,976
Nuclear decommissioning trust funds	3,842	3,500
Operating lease right-of-use assets, net	377	346
Other (includes amounts related to VIEs)	722	740
Total other noncurrent assets	8,997	8,562
Total Assets	34,394	33,733
Current Liabilities
Accounts payable	416	454
Accounts payable to affiliated companies	214	215
Notes payable to affiliated companies	270	295
Taxes accrued	87	85
Interest accrued	90	99
Current maturities of long-term debt (includes amounts related to VIEs)	1,806	603
Asset retirement obligations	250	283
Regulatory liabilities	472	530
Other	413	411
Total current liabilities	4,018	2,975
Long-Term Debt (includes amounts related to VIEs)	7,321	8,505
Long-Term Debt Payable to Affiliated Companies	150	150
Other Noncurrent Liabilities
Deferred income taxes	2,455	2,298
Asset retirement obligations	5,387	5,352
Regulatory liabilities	4,578	4,394
Operating lease liabilities	354	323
Accrued pension and other post-retirement benefit costs	237	242
Investment tax credits	130	132
Other (includes amounts related to VIEs)	79	102
Total other noncurrent liabilities	13,220	12,843
Commitments and Contingencies
Equity
Member's Equity	9,685	9,260
Total Liabilities and Equity	34,394	33,733
Duke Energy Florida
Current Assets
Cash and cash equivalents	22	11
Receivables of VIEs (net of allowance for doubtful accounts)	451	401
Receivables (net of allowance for doubtful accounts)	91	94
Receivables from affiliated companies	8	3
Inventory	440	464
Regulatory assets (includes amounts related to VIEs)	407	265
Other (includes amounts related to VIEs)	59	41
Total current assets	1,478	1,279
Property, Plant and Equipment
Cost	22,933	22,123
Accumulated depreciation and amortization	(5,746)	(5,560)
Net property, plant and equipment	17,187	16,563
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	1,701	1,799
Nuclear decommissioning trust funds	598	637
Operating lease right-of-use assets, net	323	344
Other (includes amounts related to VIEs)	342	335
Total other noncurrent assets	2,964	3,115
Total Assets	21,629	20,957
Current Liabilities
Accounts payable	487	465
Accounts payable to affiliated companies	129	85
Notes payable to affiliated companies	363	196
Taxes accrued	144	82
Interest accrued	67	69
Current maturities of long-term debt (includes amounts related to VIEs)	575	823
Regulatory liabilities	85	110
Other	395	374
Total current liabilities	2,245	2,204
Long-Term Debt (includes amounts related to VIEs)	7,306	7,092
Other Noncurrent Liabilities
Deferred income taxes	2,286	2,191
Asset retirement obligations	467	514
Regulatory liabilities	665	658
Operating lease liabilities	280	300
Accrued pension and other post-retirement benefit costs	227	231
Other (includes amounts related to VIEs)	262	209
Total other noncurrent liabilities	4,187	4,103
Commitments and Contingencies
Equity
Member's equity	7,893	7,560
Accumulated other comprehensive loss	(2)	(2)
Member's Equity	7,891	7,558	7,124
Total Liabilities and Equity	21,629	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)	33	39
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	914	937
Current Liabilities
Current maturities of long-term debt (includes amounts related to VIEs)	55	305
Long-Term Debt (includes amounts related to VIEs)	1,223	1,002
Duke Energy Ohio
Current Assets
Cash and cash equivalents	12	14
Receivables (net of allowance for doubtful accounts)	96	98
Receivables from affiliated companies	83	102
Inventory	111	110
Regulatory assets (includes amounts related to VIEs)	56	39
Other (includes amounts related to VIEs)	26	31
Total current assets	384	394
Property, Plant and Equipment
Cost	11,351	11,022
Accumulated depreciation and amortization	(3,068)	(3,013)
Net property, plant and equipment	8,283	8,009
Other Noncurrent Assets
Goodwill	920	920
Regulatory assets (includes amounts related to VIEs)	636	610
Operating lease right-of-use assets, net	20	20
Other (includes amounts related to VIEs)	79	72
Total other noncurrent assets	1,655	1,622
Total Assets	10,322	10,025
Current Liabilities
Accounts payable	255	279
Accounts payable to affiliated companies	72	68
Notes payable to affiliated companies	390	169
Taxes accrued	189	247
Interest accrued	31	31
Current maturities of long-term debt (includes amounts related to VIEs)	50	50
Asset retirement obligations	12	3
Regulatory liabilities	65	65
Other	70	70
Total current liabilities	1,134	982
Long-Term Debt (includes amounts related to VIEs)	3,016	3,014
Long-Term Debt Payable to Affiliated Companies	25	25
Other Noncurrent Liabilities
Deferred income taxes	1,014	981
Asset retirement obligations	99	108
Regulatory liabilities	741	748
Operating lease liabilities	19	20
Accrued pension and other post-retirement benefit costs	113	113
Other (includes amounts related to VIEs)	96	99
Total other noncurrent liabilities	2,082	2,069
Commitments and Contingencies
Equity
Common stock	762	762
Additional paid-in capital	2,776	2,776
Retained earnings	527	397
Total Duke Energy Corporation stockholders' equity	4,065	3,935	3,814
Total Liabilities and Equity	10,322	10,025
Duke Energy Indiana
Current Assets
Cash and cash equivalents	12	7
Receivables (net of allowance for doubtful accounts)	69	55
Receivables from affiliated companies	95	112
Notes receivable from affiliated companies	18
Inventory	412	473
Regulatory assets (includes amounts related to VIEs)	173	125
Other (includes amounts related to VIEs)	46	37
Total current assets	825	809
Property, Plant and Equipment
Cost	17,213	17,382
Accumulated depreciation and amortization	(5,514)	(5,661)
Net property, plant and equipment	11,699	11,721
Other Noncurrent Assets
Regulatory assets (includes amounts related to VIEs)	1,310	1,203
Operating lease right-of-use assets, net	53	55
Other (includes amounts related to VIEs)	268	253
Total other noncurrent assets	1,631	1,511
Total Assets	14,155	14,041
Current Liabilities
Accounts payable	209	188
Accounts payable to affiliated companies	59	88
Notes payable to affiliated companies		131
Taxes accrued	64	62
Interest accrued	52	51
Current maturities of long-term debt (includes amounts related to VIEs)	123	70
Asset retirement obligations	176	168
Regulatory liabilities	141	111
Other	104	83
Total current liabilities	928	952
Long-Term Debt (includes amounts related to VIEs)	3,819	3,871
Long-Term Debt Payable to Affiliated Companies	150	150
Other Noncurrent Liabilities
Deferred income taxes	1,262	1,228
Asset retirement obligations	980	1,008
Regulatory liabilities	1,593	1,627
Operating lease liabilities	52	53
Accrued pension and other post-retirement benefit costs	172	171
Investment tax credits	168	168
Other (includes amounts related to VIEs)	32	30
Total other noncurrent liabilities	4,259	4,285
Commitments and Contingencies
Equity
Member's Equity	4,999	4,783
Total Liabilities and Equity	14,155	14,041
Piedmont
Current Assets
Receivables (net of allowance for doubtful accounts)	106	250
Receivables from affiliated companies	10	10
Inventory	43	68
Regulatory assets (includes amounts related to VIEs)	108	153
Other (includes amounts related to VIEs)	48	20
Total current assets	315	501
Property, Plant and Equipment
Cost	9,556	9,134
Accumulated depreciation and amortization	(1,838)	(1,749)
Net property, plant and equipment	7,718	7,385
Other Noncurrent Assets
Goodwill	49	49
Regulatory assets (includes amounts related to VIEs)	337	302
Operating lease right-of-use assets, net	18	20
Investments in equity method unconsolidated affiliates	89	88
Other (includes amounts related to VIEs)	277	270
Total other noncurrent assets	770	729
Total Assets	8,803	8,615
Current Liabilities
Accounts payable	165	230
Accounts payable to affiliated companies	44	79
Notes payable to affiliated companies	93	530
Taxes accrued	27	23
Interest accrued	36	34
Current maturities of long-term debt (includes amounts related to VIEs)		160
Regulatory liabilities	57	88
Other	80	69
Total current liabilities	502	1,213
Long-Term Debt (includes amounts related to VIEs)	2,967	2,620
Other Noncurrent Liabilities
Deferred income taxes	861	821
Asset retirement obligations	20	20
Regulatory liabilities	1,007	1,044
Operating lease liabilities	16	19
Accrued pension and other post-retirement benefit costs	6	8
Other (includes amounts related to VIEs)	185	155
Total other noncurrent liabilities	2,095	2,067
Commitments and Contingencies
Equity
Common stock	1,635	1,310
Retained earnings	1,604	1,405
Total Duke Energy Corporation stockholders' equity	3,239	2,715	2,622
Total Liabilities and Equity	8,803	8,615
Preferred stock, Series A
Equity
Preferred stock		973	$ 973
Preferred stock, Series B
Equity
Preferred stock	$ 989	$ 989

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