Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Current Assets
Cash and cash equivalents	$ 303	$ 358
Receivables (net of allowance for doubtful accounts)	682	779
Receivables of VIEs (net of allowance for doubtful accounts)	2,397	1,995
Inventory	3,140	3,250
Regulatory assets (includes amounts related to VIEs)	1,906	1,437
Other	1,092	634
Total current assets	9,520	8,453
Property, Plant and Equipment
Cost	132,677	127,507
Accumulated depreciation and amortization	(43,200)	(41,537)
Generation facilities to be retired, net	388	421
Net property, plant and equipment	89,865	86,391
Other Noncurrent Assets
Goodwill	19,303	19,396
Regulatory assets	12,616	12,442
Nuclear decommissioning trust funds	7,421	7,097
Investments in equity method unconsolidated affiliates	1,328	1,175
Other	3,112	2,960
Total other noncurrent assets	43,780	43,070
Total Assets	143,165	137,914
Current Liabilities
Accounts payable	3,234	3,043
Notes payable and commercial paper	2,891	2,163
Taxes accrued	674	551
Interest accrued	557	525
Current maturities of long-term debt (includes amounts related to VIEs)	3,455	3,244
Asset retirement obligations	902	689
Regulatory liabilities	506	402
Other	1,703	1,865
Total current liabilities	13,922	12,482
Long-Term Debt (includes amounts related to VIEs)	50,507	49,035
Other Noncurrent Liabilities
Deferred income taxes	7,765	6,621
Asset retirement obligations	9,354	9,486
Regulatory liabilities	15,587	15,330
Accrued pension and other post-retirement benefit costs	1,001	1,103
Investment tax credits	539	539
Other	1,477	1,581
Total other noncurrent liabilities	35,723	34,660
Commitments and Contingencies
Equity
Common stock	1	1
Additional paid-in capital	39,747	38,792
Retained earnings	3,313	3,013
Accumulated other comprehensive loss	(66)	(67)
Total Duke Energy Corporation stockholders' equity	42,995	41,739
Noncontrolling interests	18	(2)
Total equity	43,013	41,737
Total Liabilities and Equity	143,165	137,914
Duke Energy Carolinas [Member]
Current Assets
Cash and cash equivalents	27	16
Receivables (net of allowance for doubtful accounts)	203	200
Receivables of VIEs (net of allowance for doubtful accounts)	795	640
Receivables from affiliated companies	158	95
Inventory	976	971
Regulatory assets (includes amounts related to VIEs)	435	299
Other	55	19
Total current assets	2,649	2,240
Property, Plant and Equipment
Cost	44,086	42,939
Accumulated depreciation and amortization	(15,536)	(15,063)
Net property, plant and equipment	28,550	27,876
Other Noncurrent Assets
Regulatory assets	3,188	2,853
Nuclear decommissioning trust funds	3,943	3,772
Other	1,009	979
Total other noncurrent assets	8,140	7,604
Total Assets	39,339	37,720
Current Liabilities
Accounts payable	888	842
Accounts payable to affiliated companies	142	209
Notes payable to affiliated companies	804	104
Taxes accrued	189	234
Interest accrued	141	108
Current maturities of long-term debt (includes amounts related to VIEs)	506	1,205
Asset retirement obligations	292	337
Regulatory liabilities	144	126
Other	419	486
Total current liabilities	3,525	3,651
Long-Term Debt (includes amounts related to VIEs)	9,589	8,598
Long-Term Debt Payable to Affiliated Companies	300	300
Other Noncurrent Liabilities
Deferred income taxes	3,639	3,413
Asset retirement obligations	3,420	3,273
Regulatory liabilities	6,480	6,231
Accrued pension and other post-retirement benefit costs	97	95
Investment tax credits	233	232
Other	508	566
Total other noncurrent liabilities	14,377	13,810
Commitments and Contingencies
Equity
Member's equity	11,554	11,368
Accumulated other comprehensive loss	(6)	(7)
Total member's equity	11,548	11,361
Total Liabilities and Equity	39,339	37,720
Progress Energy [Member]
Current Assets
Cash and cash equivalents	43	40
Receivables (net of allowance for doubtful accounts)	131	123
Receivables of VIEs (net of allowance for doubtful accounts)	1,098	780
Receivables from affiliated companies	15	31
Notes receivable from affiliated companies	445	240
Inventory	1,473	1,592
Regulatory assets (includes amounts related to VIEs)	1,122	741
Other	256	334
Total current assets	4,583	3,881
Property, Plant and Equipment
Cost	49,822	47,323
Accumulated depreciation and amortization	(16,652)	(15,857)
Generation facilities to be retired, net	388	421
Net property, plant and equipment	33,558	31,887
Other Noncurrent Assets
Goodwill	3,655	3,655
Regulatory assets	5,987	6,010
Nuclear decommissioning trust funds	3,477	3,324
Other	1,019	931
Total other noncurrent assets	14,138	13,920
Total Assets	52,279	49,688
Current Liabilities
Accounts payable	1,301	1,006
Accounts payable to affiliated companies	327	251
Notes payable to affiliated companies	794	805
Taxes accrued	244	101
Interest accrued	228	212
Current maturities of long-term debt (includes amounts related to VIEs)	1,322	771
Asset retirement obligations	475	295
Regulatory liabilities	246	213
Other	672	729
Total current liabilities	5,609	4,383
Long-Term Debt (includes amounts related to VIEs)	17,440	16,916
Long-Term Debt Payable to Affiliated Companies	150	150
Other Noncurrent Liabilities
Deferred income taxes	3,947	3,502
Asset retirement obligations	4,960	5,119
Regulatory liabilities	5,275	5,306
Accrued pension and other post-retirement benefit costs	513	545
Other	255	302
Total other noncurrent liabilities	14,950	14,774
Commitments and Contingencies
Equity
Additional paid-in capital	9,143	9,143
Retained earnings	5,009	4,350
Accumulated other comprehensive loss	(24)	(25)
Total Duke Energy Corporation stockholders' equity	14,128	13,468
Noncontrolling interests	2	(3)
Total equity	14,130	13,465
Total Liabilities and Equity	52,279	49,688
Duke Energy Progress [Member]
Current Assets
Cash and cash equivalents	17	20
Receivables (net of allowance for doubtful accounts)	34	56
Receivables of VIEs (net of allowance for doubtful accounts)	635	459
Receivables from affiliated companies	6	3
Notes receivable from affiliated companies	52
Inventory	956	1,017
Regulatory assets (includes amounts related to VIEs)	677	352
Other	112	97
Total current assets	2,489	2,004
Property, Plant and Equipment
Cost	31,091	29,583
Accumulated depreciation and amortization	(11,484)	(10,903)
Generation facilities to be retired, net	388	421
Net property, plant and equipment	19,995	19,101
Other Noncurrent Assets
Regulatory assets	3,822	3,507
Nuclear decommissioning trust funds	2,744	2,588
Other	653	599
Total other noncurrent assets	7,219	6,694
Total Assets	29,703	27,799
Current Liabilities
Accounts payable	808	402
Accounts payable to affiliated companies	252	179
Notes payable to affiliated companies		240
Taxes accrued	92	64
Interest accrued	100	102
Current maturities of long-term debt (includes amounts related to VIEs)	603	3
Asset retirement obligations	470	295
Regulatory liabilities	162	139
Other	353	376
Total current liabilities	2,840	1,800
Long-Term Debt (includes amounts related to VIEs)	7,401	7,204
Long-Term Debt Payable to Affiliated Companies	150	150
Other Noncurrent Liabilities
Deferred income taxes	2,076	1,883
Asset retirement obligations	4,371	4,378
Regulatory liabilities	4,128	3,999
Accrued pension and other post-retirement benefit costs	240	248
Investment tax credits	143	143
Other	48	45
Total other noncurrent liabilities	11,006	10,696
Commitments and Contingencies
Equity
Total member's equity	8,306	7,949
Total Liabilities and Equity	29,703	27,799
Duke Energy Florida [Member]
Current Assets
Cash and cash equivalents	20	13
Receivables (net of allowance for doubtful accounts)	95	65
Receivables of VIEs (net of allowance for doubtful accounts)	463	321
Receivables from affiliated companies	20	2
Notes receivable from affiliated companies	393	313
Inventory	517	574
Regulatory assets (includes amounts related to VIEs)	445	389
Other	27	86
Total current assets	1,980	1,763
Property, Plant and Equipment
Cost	18,722	17,730
Accumulated depreciation and amortization	(5,161)	(4,947)
Net property, plant and equipment	13,561	12,783
Other Noncurrent Assets
Regulatory assets	2,165	2,503
Nuclear decommissioning trust funds	734	736
Other	315	284
Total other noncurrent assets	3,214	3,523
Total Assets	18,755	18,069
Current Liabilities
Accounts payable	492	602
Accounts payable to affiliated companies	83	74
Taxes accrued	232	34
Interest accrued	74	56
Current maturities of long-term debt (includes amounts related to VIEs)	269	768
Asset retirement obligations	4
Regulatory liabilities	84	74
Other	315	334
Total current liabilities	1,553	1,942
Long-Term Debt (includes amounts related to VIEs)	7,102	6,327
Other Noncurrent Liabilities
Deferred income taxes	2,012	1,761
Asset retirement obligations	589	742
Regulatory liabilities	1,146	1,307
Accrued pension and other post-retirement benefit costs	241	264
Other	56	108
Total other noncurrent liabilities	4,044	4,182
Commitments and Contingencies
Equity
Member's equity	6,058	5,614
Accumulated other comprehensive loss	(2)	4
Total member's equity	6,056	5,618
Total Liabilities and Equity	18,755	18,069
Duke Energy Ohio [Member]
Current Assets
Cash and cash equivalents	7	12
Receivables (net of allowance for doubtful accounts)	112	68
Receivables from affiliated companies	71	133
Notes receivable from affiliated companies		14
Inventory	135	133
Regulatory assets (includes amounts related to VIEs)	41	49
Other	28	39
Total current assets	394	448
Property, Plant and Equipment
Cost	9,176	8,732
Accumulated depreciation and amortization	(2,683)	(2,691)
Net property, plant and equipment	6,493	6,041
Other Noncurrent Assets
Goodwill	920	920
Regulatory assets	427	445
Other	62	21
Total other noncurrent assets	1,409	1,386
Total Assets	8,296	7,875
Current Liabilities
Accounts payable	251	313
Accounts payable to affiliated companies	54	62
Notes payable to affiliated companies	268	29
Taxes accrued	159	190
Interest accrued	34	21
Current maturities of long-term debt (includes amounts related to VIEs)	452	3
Asset retirement obligations	7	3
Regulatory liabilities	57	36
Other	67	71
Total current liabilities	1,349	728
Long-Term Debt (includes amounts related to VIEs)	1,589	2,039
Long-Term Debt Payable to Affiliated Companies	25	25
Other Noncurrent Liabilities
Deferred income taxes	790	781
Asset retirement obligations	91	81
Regulatory liabilities	865	891
Accrued pension and other post-retirement benefit costs	84	59
Other	113	108
Total other noncurrent liabilities	1,943	1,920
Equity
Common stock	762	762
Additional paid-in capital	2,776	2,670
Retained earnings	(148)	(269)
Total Duke Energy Corporation stockholders' equity	3,390	3,163
Total Liabilities and Equity	8,296	7,875
Duke Energy Indiana [Member]
Current Assets
Cash and cash equivalents	17	9
Receivables (net of allowance for doubtful accounts)	56	57
Receivables from affiliated companies	98	125
Inventory	434	450
Regulatory assets (includes amounts related to VIEs)	190	165
Other	64	30
Total current assets	859	836
Property, Plant and Equipment
Cost	15,298	14,948
Accumulated depreciation and amortization	(4,831)	(4,662)
Net property, plant and equipment	10,467	10,286
Other Noncurrent Assets
Regulatory assets	950	978
Other	233	189
Total other noncurrent assets	1,183	1,167
Total Assets	12,509	12,289
Current Liabilities
Accounts payable	177	196
Accounts payable to affiliated companies	72	78
Notes payable to affiliated companies	201	161
Taxes accrued	44	95
Interest accrued	54	57
Current maturities of long-term debt (includes amounts related to VIEs)	62	3
Asset retirement obligations	128	54
Regulatory liabilities	25	24
Other	109	104
Total current liabilities	872	772
Long-Term Debt (includes amounts related to VIEs)	3,571	3,630
Long-Term Debt Payable to Affiliated Companies	150	150
Other Noncurrent Liabilities
Deferred income taxes	988	925
Asset retirement obligations	616	727
Regulatory liabilities	1,761	1,723
Accrued pension and other post-retirement benefit costs	110	76
Investment tax credits	147	147
Other	31	18
Total other noncurrent liabilities	3,653	3,616
Equity
Total member's equity	4,263	4,121
Total Liabilities and Equity	12,509	12,289
Piedmont Natural Gas [Member]
Current Assets
Cash and cash equivalents	6	19
Receivables (net of allowance for doubtful accounts)	83	275
Receivables from affiliated companies	10	7
Notes receivable from affiliated companies	11
Inventory	51	66
Regulatory assets (includes amounts related to VIEs)	38	95
Other	48	52
Total current assets	247	514
Property, Plant and Equipment
Cost	7,265	6,725
Accumulated depreciation and amortization	(1,553)	(1,479)
Net property, plant and equipment	5,712	5,246
Other Noncurrent Assets
Goodwill	49	49
Regulatory assets	305	283
Investments in equity method unconsolidated affiliates	63	61
Other	65	65
Total other noncurrent assets	482	458
Total Assets	6,441	6,218
Current Liabilities
Accounts payable	131	125
Accounts payable to affiliated companies	27	13
Notes payable to affiliated companies		364
Taxes accrued	31	19
Interest accrued	25	31
Current maturities of long-term debt (includes amounts related to VIEs)	350	250
Regulatory liabilities	34	3
Other	51	69
Total current liabilities	649	874
Long-Term Debt (includes amounts related to VIEs)	1,788	1,787
Other Noncurrent Liabilities
Deferred income taxes	586	564
Asset retirement obligations	15	15
Regulatory liabilities	1,171	1,141
Accrued pension and other post-retirement benefit costs	3	5
Other	186	170
Total other noncurrent liabilities	1,961	1,895
Commitments and Contingencies
Equity
Common stock	1,160	860
Retained earnings	883	802
Total Duke Energy Corporation stockholders' equity	2,043	1,662
Total Liabilities and Equity	$ 6,441	$ 6,218

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The period end amount for a type of inventory held by the utility in a schedule of inventories.

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Period end book value of accumulated depreciation on property, plant and equipment (PPE) that is owned by the regulated operations of the public utility.

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Period end amount of total net PPE.

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Period end amount of total gross PPE.

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Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost.

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Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer.

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The amount for the individual regulatory current liability as itemized in a table of regulatory current liabilities as of the end of the period.

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The amount for the individual regulatory noncurrent liability as itemized in a table of regulatory noncurrent liabilities as of the end of the period.

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The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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Amount of stockholders' equity (deficit), net of receivables from officers, directors, owners, and affiliates of the entity, attributable to both the parent and noncontrolling interests. Amount excludes temporary equity. Alternate caption for the concept is permanent equity.

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Carrying value as of the balance sheet date of obligations incurred and payable for statutory income, sales, use, payroll, excise, real, property and other taxes. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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