Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015
Current Assets
Cash and cash equivalents	$ 6,179	$ 857
Receivables (net of allowance for doubtful accounts)	583	703
Receivables of VIEs (net of allowance for doubtful accounts)	2,139	1,748
Inventory	3,351	3,810
Regulatory assets	853	877
Other	429	327
Total current assets	13,534	8,322
Investments and Other Assets
Investments in equity method unconsolidated affiliates	604	499
Nuclear decommissioning trust funds	6,112	5,825
Goodwill	16,354	16,343
Other	2,948	3,042
Total investments and other assets	26,018	25,709
Property, Plant and Equipment
Cost	116,376	112,826
Accumulated depreciation and amortization	(38,812)	(37,665)
Generation facilities to be retired, net	652	548
Net property, plant and equipment	78,216	75,709
Regulatory Assets and Deferred Debits
Regulatory assets	11,896	11,373
Other	22	43
Total regulatory assets and deferred debits	11,918	11,416
Total Assets	129,686	121,156
Current Liabilities
Accounts payable	2,138	2,400
Notes payable and commercial paper	3,011	3,633
Taxes accrued	636	348
Interest accrued	504	430
Current maturities of long-term debt	3,201	2,074
Asset retirement obligation	539
Regulatory liabilities	319	400
Other	1,728	2,115
Total current liabilities	12,076	11,400
Long-Term Debt	43,964	37,495
Deferred Credits and Other Liabilities
Deferred income taxes	13,201	12,705
Investment tax credits	486	472
Accrued pension and other post-retirement benefit costs	1,030	1,088
Asset retirement obligations	10,291	10,264
Regulatory liabilities	6,241	6,255
Other	1,851	1,706
Total deferred credits and other liabilities	33,100	32,490
Commitments and Contingencies
Equity
Common stock	1	1
Additional paid-in capital	37,997	37,968
Retained earnings	3,212	2,564
Accumulated other comprehensive income (loss)	(721)	(806)
Total Duke Energy Corporation stockholders' equity	40,489	39,727
Noncontrolling interests	57	44
Total equity	40,546	39,771
Total Liabilities and Equity	129,686	121,156
Duke Energy Carolinas [Member]
Current Assets
Cash and cash equivalents	82	13
Receivables (net of allowance for doubtful accounts)	129	142
Receivables of VIEs (net of allowance for doubtful accounts)	780	596
Receivables from affiliated companies	88	107
Notes receivable from affiliated companies	32	163
Inventory	1,053	1,276
Regulatory assets	256	305
Other	22	128
Total current assets	2,442	2,730
Investments and Other Assets
Nuclear decommissioning trust funds	3,234	3,050
Other	923	999
Total investments and other assets	4,157	4,049
Property, Plant and Equipment
Cost	40,495	39,398
Accumulated depreciation and amortization	(14,125)	(13,521)
Net property, plant and equipment	26,370	25,877
Regulatory Assets and Deferred Debits
Regulatory assets	3,040	2,766
Other	3	4
Total regulatory assets and deferred debits	3,043	2,770
Total Assets	36,012	35,426
Current Liabilities
Accounts payable	582	753
Accounts payable to affiliated companies	149	229
Taxes accrued	198	25
Interest accrued	125	95
Current maturities of long-term debt	468	356
Asset retirement obligation	303
Regulatory liabilities	125	39
Other	417	519
Total current liabilities	2,367	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	6,464	6,146
Investment tax credits	195	199
Accrued pension and other post-retirement benefit costs	93	107
Asset retirement obligations	3,622	3,918
Regulatory liabilities	2,864	2,802
Other	685	621
Total deferred credits and other liabilities	13,923	13,793
Commitments and Contingencies
Equity
Members' equity	10,840	11,617
Accumulated other comprehensive income (loss)	(10)	(11)
Total equity	10,830	11,606
Total Liabilities and Equity	36,012	35,426
Progress Energy [Member]
Current Assets
Cash and cash equivalents	165	44
Receivables (net of allowance for doubtful accounts)	109	151
Receivables of VIEs (net of allowance for doubtful accounts)	857	658
Receivables from affiliated companies	8	375
Notes receivable from affiliated companies	43
Inventory	1,653	1,751
Regulatory assets	347	362
Other	183	156
Total current assets	3,365	3,497
Investments and Other Assets
Nuclear decommissioning trust funds	2,879	2,775
Goodwill	3,655	3,655
Other	865	834
Total investments and other assets	7,399	7,264
Property, Plant and Equipment
Cost	44,151	42,666
Accumulated depreciation and amortization	(15,169)	(14,867)
Generation facilities to be retired, net	562	548
Net property, plant and equipment	29,544	28,347
Regulatory Assets and Deferred Debits
Regulatory assets	5,652	5,435
Other	4	5
Total regulatory assets and deferred debits	5,656	5,440
Total Assets	45,964	44,548
Current Liabilities
Accounts payable	673	722
Accounts payable to affiliated companies	202	311
Notes payable to affiliated companies	510	1,308
Taxes accrued	228	53
Interest accrued	186	195
Current maturities of long-term debt	578	315
Asset retirement obligation	236
Regulatory liabilities	148	286
Other	721	891
Total current liabilities	3,482	4,081
Long-Term Debt	15,792	13,999
Long-Term Debt Payable to Affiliated Companies	150	150
Deferred Credits and Other Liabilities
Deferred income taxes	5,148	4,790
Accrued pension and other post-retirement benefit costs	516	536
Asset retirement obligations	5,421	5,369
Regulatory liabilities	2,353	2,387
Other	379	383
Total deferred credits and other liabilities	13,817	13,465
Commitments and Contingencies
Equity
Additional paid-in capital	8,096	8,092
Retained earnings	4,683	4,831
Accumulated other comprehensive income (loss)	(40)	(48)
Total Duke Energy Corporation stockholders' equity	12,739	12,875
Noncontrolling interests	(16)	(22)
Total equity	12,723	12,853
Total Liabilities and Equity	45,964	44,548
Duke Energy Progress [Member]
Current Assets
Cash and cash equivalents	136	15
Receivables (net of allowance for doubtful accounts)	42	87
Receivables of VIEs (net of allowance for doubtful accounts)	473	349
Receivables from affiliated companies	5	16
Notes receivable from affiliated companies	65
Inventory	998	1,088
Regulatory assets	186	264
Other	83	121
Total current assets	1,988	1,940
Investments and Other Assets
Nuclear decommissioning trust funds	2,171	2,035
Other	518	486
Total investments and other assets	2,689	2,521
Property, Plant and Equipment
Cost	28,001	27,313
Accumulated depreciation and amortization	(10,508)	(10,141)
Generation facilities to be retired, net	562	548
Net property, plant and equipment	18,055	17,720
Regulatory Assets and Deferred Debits
Regulatory assets	3,093	2,710
Other	2	3
Total regulatory assets and deferred debits	3,095	2,713
Total Assets	25,827	24,894
Current Liabilities
Accounts payable	319	399
Accounts payable to affiliated companies	143	190
Notes payable to affiliated companies		209
Taxes accrued	91	15
Interest accrued	81	96
Current maturities of long-term debt	252	2
Asset retirement obligation	236
Regulatory liabilities	129	85
Other	326	412
Total current liabilities	1,577	1,408
Long-Term Debt	6,609	6,366
Long-Term Debt Payable to Affiliated Companies	150	150
Deferred Credits and Other Liabilities
Deferred income taxes	3,279	3,027
Investment tax credits	148	132
Accrued pension and other post-retirement benefit costs	247	262
Asset retirement obligations	4,623	4,567
Regulatory liabilities	1,874	1,878
Other	23	45
Total deferred credits and other liabilities	10,194	9,911
Commitments and Contingencies
Equity
Total equity	7,297	7,059
Total Liabilities and Equity	25,827	24,894
Duke Energy Florida [Member]
Current Assets
Cash and cash equivalents	10	8
Receivables (net of allowance for doubtful accounts)	65	60
Receivables of VIEs (net of allowance for doubtful accounts)	385	308
Receivables from affiliated companies	5	84
Inventory	656	663
Regulatory assets	161	98
Other	46	21
Total current assets	1,328	1,242
Investments and Other Assets
Nuclear decommissioning trust funds	708	740
Other	292	292
Total investments and other assets	1,000	1,032
Property, Plant and Equipment
Cost	16,139	15,343
Accumulated depreciation and amortization	(4,654)	(4,720)
Net property, plant and equipment	11,485	10,623
Regulatory Assets and Deferred Debits
Regulatory assets	2,559	2,725
Other	2	2
Total regulatory assets and deferred debits	2,561	2,727
Total Assets	16,374	15,624
Current Liabilities
Accounts payable	354	322
Accounts payable to affiliated companies	61	116
Notes payable to affiliated companies	63	813
Taxes accrued	209	132
Interest accrued	58	43
Current maturities of long-term debt	326	13
Regulatory liabilities	18	200
Other	367	452
Total current liabilities	1,456	2,091
Long-Term Debt	5,802	4,253
Deferred Credits and Other Liabilities
Deferred income taxes	2,597	2,460
Accrued pension and other post-retirement benefit costs	237	242
Asset retirement obligations	798	802
Regulatory liabilities	478	509
Other	167	146
Total deferred credits and other liabilities	4,277	4,159
Commitments and Contingencies
Equity
Members' equity	4,837	5,121
Accumulated other comprehensive income (loss)	2
Total equity	4,839	5,121
Total Liabilities and Equity	16,374	15,624
Duke Energy Ohio [Member]
Current Assets
Cash and cash equivalents	99	14
Receivables (net of allowance for doubtful accounts)	68	66
Receivables from affiliated companies	96	84
Notes receivable from affiliated companies	47
Inventory	110	105
Regulatory assets	46	36
Other	59	110
Total current assets	525	415
Investments and Other Assets
Goodwill	920	920
Other	18	20
Total investments and other assets	938	940
Property, Plant and Equipment
Cost	8,019	7,750
Accumulated depreciation and amortization	(2,566)	(2,507)
Net property, plant and equipment	5,453	5,243
Regulatory Assets and Deferred Debits
Regulatory assets	490	497
Other	2	2
Total regulatory assets and deferred debits	492	499
Total Assets	7,408	7,097
Current Liabilities
Accounts payable	250	207
Accounts payable to affiliated companies	49	53
Notes payable to affiliated companies		103
Taxes accrued	163	171
Interest accrued	32	18
Current maturities of long-term debt	54	106
Regulatory liabilities	17	12
Other	84	153
Total current liabilities	649	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	1,422	1,407
Accrued pension and other post-retirement benefit costs	51	56
Asset retirement obligations	108	125
Regulatory liabilities	238	245
Other	168	165
Total deferred credits and other liabilities	1,987	1,998
Commitments and Contingencies
Equity
Common stock	762	762
Additional paid-in capital	2,695	2,720
Retained earnings	(518)	(698)
Total equity	2,939	2,784
Total Liabilities and Equity	7,408	7,097
Duke Energy Indiana [Member]
Current Assets
Cash and cash equivalents	94	9
Receivables (net of allowance for doubtful accounts)	84	96
Receivables from affiliated companies	74	71
Notes receivable from affiliated companies	38	83
Inventory	424	570
Regulatory assets	131	102
Other	104	15
Total current assets	949	946
Investments and Other Assets
Total investments and other assets	174	212
Property, Plant and Equipment
Cost	14,069	14,007
Accumulated depreciation and amortization	(4,225)	(4,484)
Generation facilities to be retired, net	90
Net property, plant and equipment	9,934	9,523
Regulatory Assets and Deferred Debits
Regulatory assets	909	716
Other	2	2
Total regulatory assets and deferred debits	911	718
Total Assets	11,968	11,399
Current Liabilities
Accounts payable	167	189
Accounts payable to affiliated companies	82	83
Taxes accrued	48	89
Interest accrued	54	56
Current maturities of long-term debt	71	547
Regulatory liabilities	30	62
Other	95	97
Total current liabilities	547	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	1,822	1,657
Investment tax credits	137	138
Accrued pension and other post-retirement benefit costs	72	80
Asset retirement obligations	847	525
Regulatory liabilities	738	754
Other	94	65
Total deferred credits and other liabilities	3,710	3,219
Commitments and Contingencies
Equity
Members' equity	3,995
Common stock		1
Additional paid-in capital		1,384
Retained earnings		2,450
Accumulated other comprehensive income (loss)		1
Total equity	3,995
Total equity		3,836
Total Liabilities and Equity	$ 11,968	$ 11,399