Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
Current Assets
Cash and cash equivalents	$ 676	$ 857
Receivables (net of allowance for doubtful accounts)	575	703
Receivables of VIEs (net of allowance for doubtful accounts)	1,943	1,748
Inventory	3,627	3,810
Regulatory assets	825	877
Other	451	327
Total current assets	8,097	8,322
Investments and Other Assets
Investments in equity method unconsolidated affiliates	613	499
Nuclear decommissioning trust funds	5,966	5,825
Goodwill	16,357	16,343
Other	2,972	3,042
Total investments and other assets	25,908	25,709
Property, Plant and Equipment
Cost	115,143	112,826
Accumulated depreciation and amortization	(38,412)	(37,665)
Generation facilities to be retired, net	598	548
Net property, plant and equipment	77,329	75,709
Regulatory Assets and Deferred Debits
Regulatory assets	11,290	11,373
Other	30	43
Total regulatory assets and deferred debits	11,320	11,416
Total Assets	122,654	121,156
Current Liabilities
Accounts payable	2,221	2,400
Notes payable and commercial paper	2,312	3,633
Taxes accrued	467	348
Interest accrued	448	430
Current maturities of long-term debt	2,342	2,074
Regulatory liabilities	332	400
Other	1,784	2,115
Total current liabilities	9,906	11,400
Long-Term Debt	39,931	37,495
Deferred Credits and Other Liabilities
Deferred income taxes	13,038	12,705
Investment tax credits	492	472
Accrued pension and other post-retirement benefit costs	1,044	1,088
Asset retirement obligations	10,231	10,264
Regulatory liabilities	6,334	6,255
Other	1,730	1,706
Total deferred credits and other liabilities	32,869	32,490
Commitments and Contingencies
Equity
Common stock	1	1
Additional paid-in capital	37,984	37,968
Retained earnings	2,627	2,564
Accumulated other comprehensive income (loss)	(717)	(806)
Total Duke Energy Corporation stockholders' equity	39,895	39,727
Noncontrolling interests	53	44
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	39,948	39,771
Total Liabilities and Equity	122,654	121,156
Duke Energy Carolinas [Member]
Current Assets
Cash and cash equivalents	16	13
Receivables (net of allowance for doubtful accounts)	112	142
Receivables of VIEs (net of allowance for doubtful accounts)	696	596
Receivables from affiliated companies	71	107
Notes receivable from affiliated companies	252	163
Inventory	1,169	1,276
Regulatory assets	262	305
Other	86	128
Total current assets	2,664	2,730
Investments and Other Assets
Nuclear decommissioning trust funds	3,133	3,050
Other	916	999
Total investments and other assets	4,049	4,049
Property, Plant and Equipment
Cost	40,285	39,398
Accumulated depreciation and amortization	(13,880)	(13,521)
Net property, plant and equipment	26,405	25,877
Regulatory Assets and Deferred Debits
Regulatory assets	2,856	2,766
Other	3	4
Total regulatory assets and deferred debits	2,859	2,770
Total Assets	35,977	35,426
Current Liabilities
Accounts payable	565	753
Accounts payable to affiliated companies	173	229
Taxes accrued	137	25
Interest accrued	108	95
Current maturities of long-term debt	468	356
Regulatory liabilities	91	39
Other	400	519
Total current liabilities	1,942	2,016
Long-Term Debt	8,592	7,711
Long-Term Debt Payable to Affiliated Companies	300	300
Deferred Credits and Other Liabilities
Deferred income taxes	6,472	6,146
Investment tax credits	196	199
Accrued pension and other post-retirement benefit costs	96	107
Asset retirement obligations	3,910	3,918
Regulatory liabilities	2,885	2,802
Other	645	621
Total deferred credits and other liabilities	14,204	13,793
Commitments and Contingencies
Equity
Member's equity	10,949	11,617
Accumulated other comprehensive income (loss)	(10)	(11)
Members' Equity	10,939	11,606
Total Liabilities and Equity	35,977	35,426
Progress Energy [Member]
Current Assets
Cash and cash equivalents	34	44
Receivables (net of allowance for doubtful accounts)	100	151
Receivables of VIEs (net of allowance for doubtful accounts)	776	658
Receivables from affiliated companies	11	375
Inventory	1,725	1,751
Regulatory assets	322	362
Other	168	156
Total current assets	3,136	3,497
Investments and Other Assets
Nuclear decommissioning trust funds	2,834	2,775
Goodwill	3,655	3,655
Other	852	834
Total investments and other assets	7,341	7,264
Property, Plant and Equipment
Cost	43,720	42,666
Accumulated depreciation and amortization	(15,087)	(14,867)
Generation facilities to be retired, net	506	548
Net property, plant and equipment	29,139	28,347
Regulatory Assets and Deferred Debits
Regulatory assets	5,298	5,435
Other	4	5
Total regulatory assets and deferred debits	5,302	5,440
Total Assets	44,918	44,548
Current Liabilities
Accounts payable	690	722
Accounts payable to affiliated companies	232	311
Notes payable to affiliated companies	916	1,308
Taxes accrued	162	53
Interest accrued	185	195
Current maturities of long-term debt	300	315
Regulatory liabilities	166	286
Other	702	891
Total current liabilities	3,353	4,081
Long-Term Debt	15,036	13,999
Long-Term Debt Payable to Affiliated Companies	150	150
Deferred Credits and Other Liabilities
Deferred income taxes	5,044	4,790
Accrued pension and other post-retirement benefit costs	519	536
Asset retirement obligations	5,386	5,369
Regulatory liabilities	2,409	2,387
Other	328	383
Total deferred credits and other liabilities	13,686	13,465
Commitments and Contingencies
Equity
Additional paid-in capital	8,092	8,092
Retained earnings	4,661	4,831
Accumulated other comprehensive income (loss)	(42)	(48)
Total Duke Energy Corporation stockholders' equity	12,711	12,875
Noncontrolling interests	(18)	(22)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	12,693	12,853
Total Liabilities and Equity	44,918	44,548
Duke Energy Progress [Member]
Current Assets
Cash and cash equivalents	8	15
Receivables (net of allowance for doubtful accounts)	35	87
Receivables of VIEs (net of allowance for doubtful accounts)	421	349
Receivables from affiliated companies	9	16
Inventory	1,068	1,088
Regulatory assets	187	264
Other	35	121
Total current assets	1,763	1,940
Investments and Other Assets
Nuclear decommissioning trust funds	2,110	2,035
Other	509	486
Total investments and other assets	2,619	2,521
Property, Plant and Equipment
Cost	27,771	27,313
Accumulated depreciation and amortization	(10,350)	(10,141)
Generation facilities to be retired, net	506	548
Net property, plant and equipment	17,927	17,720
Regulatory Assets and Deferred Debits
Regulatory assets	2,744	2,710
Other	2	3
Total regulatory assets and deferred debits	2,746	2,713
Total Assets	25,055	24,894
Current Liabilities
Accounts payable	300	399
Accounts payable to affiliated companies	134	190
Notes payable to affiliated companies	78	209
Taxes accrued	71	15
Interest accrued	96	96
Current maturities of long-term debt	252	2
Regulatory liabilities	84	85
Other	314	412
Total current liabilities	1,329	1,408
Long-Term Debt	6,163	6,366
Long-Term Debt Payable to Affiliated Companies	150	150
Deferred Credits and Other Liabilities
Deferred income taxes	3,167	3,027
Investment tax credits	152	132
Accrued pension and other post-retirement benefit costs	249	262
Asset retirement obligations	4,594	4,567
Regulatory liabilities	1,901	1,878
Other	23	45
Total deferred credits and other liabilities	10,086	9,911
Commitments and Contingencies
Equity
Member's equity	7,327	7,059
Members' Equity	7,327	7,059
Total Liabilities and Equity	25,055	24,894
Duke Energy Florida [Member]
Current Assets
Cash and cash equivalents	8	8
Receivables (net of allowance for doubtful accounts)	64	60
Receivables of VIEs (net of allowance for doubtful accounts)	355	308
Receivables from affiliated companies	3	84
Inventory	657	663
Regulatory assets	135	98
Other	43	21
Total current assets	1,265	1,242
Investments and Other Assets
Nuclear decommissioning trust funds	724	740
Other	288	292
Total investments and other assets	1,012	1,032
Property, Plant and Equipment
Cost	15,938	15,343
Accumulated depreciation and amortization	(4,730)	(4,720)
Net property, plant and equipment	11,208	10,623
Regulatory Assets and Deferred Debits
Regulatory assets	2,553	2,725
Other	3	2
Total regulatory assets and deferred debits	2,556	2,727
Total Assets	16,041	15,624
Current Liabilities
Accounts payable	390	322
Accounts payable to affiliated companies	100	116
Notes payable to affiliated companies	406	813
Taxes accrued	156	132
Interest accrued	40	43
Current maturities of long-term debt	48	13
Regulatory liabilities	82	200
Other	361	452
Total current liabilities	1,583	2,091
Long-Term Debt	5,492	4,253
Deferred Credits and Other Liabilities
Deferred income taxes	2,571	2,460
Accrued pension and other post-retirement benefit costs	238	242
Asset retirement obligations	792	802
Regulatory liabilities	508	509
Other	103	146
Total deferred credits and other liabilities	4,212	4,159
Commitments and Contingencies
Equity
Member's equity	4,753	5,121
Accumulated other comprehensive income (loss)	1
Members' Equity	4,754	5,121
Total Liabilities and Equity	16,041	15,624
Duke Energy Ohio [Member]
Current Assets
Cash and cash equivalents	10	14
Receivables (net of allowance for doubtful accounts)	63	66
Receivables from affiliated companies	35	84
Notes receivable from affiliated companies	186
Inventory	110	105
Regulatory assets	54	36
Other	65	110
Total current assets	523	415
Investments and Other Assets
Goodwill	920	920
Other	16	20
Total investments and other assets	936	940
Property, Plant and Equipment
Cost	7,906	7,750
Accumulated depreciation and amortization	(2,536)	(2,507)
Net property, plant and equipment	5,370	5,243
Regulatory Assets and Deferred Debits
Regulatory assets	472	497
Other	2	2
Total regulatory assets and deferred debits	474	499
Total Assets	7,303	7,097
Current Liabilities
Accounts payable	218	207
Accounts payable to affiliated companies	76	53
Notes payable to affiliated companies		103
Taxes accrued	108	171
Interest accrued	19	18
Current maturities of long-term debt	54	106
Regulatory liabilities	18	12
Other	82	153
Total current liabilities	575	823
Long-Term Debt	1,808	1,467
Long-Term Debt Payable to Affiliated Companies	25	25
Deferred Credits and Other Liabilities
Deferred income taxes	1,476	1,407
Accrued pension and other post-retirement benefit costs	52	56
Asset retirement obligations	125	125
Regulatory liabilities	241	245
Other	160	165
Total deferred credits and other liabilities	2,054	1,998
Commitments and Contingencies
Equity
Common stock	762	762
Additional paid-in capital	2,695	2,720
Retained earnings	(616)	(698)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	2,841	2,784
Total Liabilities and Equity	7,303	7,097
Duke Energy Indiana [Member]
Current Assets
Cash and cash equivalents	12	9
Receivables (net of allowance for doubtful accounts)	87	96
Receivables from affiliated companies	60	71
Notes receivable from affiliated companies	147	83
Inventory	508	570
Regulatory assets	115	102
Other	45	15
Total current assets	974	946
Investments and Other Assets
Total investments and other assets	221	212
Property, Plant and Equipment
Cost	13,677	14,007
Accumulated depreciation and amortization	(4,219)	(4,484)
Generation facilities to be retired, net	93
Net property, plant and equipment	9,551	9,523
Regulatory Assets and Deferred Debits
Regulatory assets	825	716
Other	2	2
Total regulatory assets and deferred debits	827	718
Total Assets	11,573	11,399
Current Liabilities
Accounts payable	146	189
Accounts payable to affiliated companies	87	83
Taxes accrued	40	89
Interest accrued	59	56
Current maturities of long-term debt	221	547
Regulatory liabilities	57	62
Other	101	97
Total current liabilities	711	1,123
Long-Term Debt	3,566	3,071
Long-Term Debt Payable to Affiliated Companies	150	150
Deferred Credits and Other Liabilities
Deferred income taxes	1,732	1,657
Investment tax credits	137	138
Accrued pension and other post-retirement benefit costs	74	80
Asset retirement obligations	520	525
Regulatory liabilities	745	754
Other	72	65
Total deferred credits and other liabilities	3,280	3,219
Commitments and Contingencies
Equity
Member's equity	3,866
Common stock		1
Additional paid-in capital		1,384
Retained earnings		2,450
Accumulated other comprehensive income (loss)		1
Members' Equity	3,866
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest		3,836
Total Liabilities and Equity	$ 11,573	$ 11,399