Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current Assets
Cash and cash equivalents	$ 1,931	$ 1,501
Short-Term investments		44
Receivables (net of allowance for doubtful accounts)	854	1,286
Restricted receivables of variable interest entities (net of allowance for doubtful accounts)	2,069	1,719
Inventory	3,200	3,250
Assets held for sale	335
Regulatory assets	1,232	895
Other	1,954	1,821
Total current assets	11,575	10,516
Investments and Other Assets
Investments in equity method unconsolidated affiliates	350	390
Nuclear decommissioning trust funds	5,374	5,132
Goodwill	16,331	16,340
Assets held for sale	2,718	107
Other	3,287	3,432
Total investments and other assets	28,060	25,401
Property, Plant and Equipment
Cost	104,140	103,115
Accumulated depreciation and amortization	(34,545)	(33,625)
Net property, plant and equipment	69,595	69,490
Regulatory Assets and Deferred Debits
Regulatory assets	10,252	9,191
Other	174	181
Total regulatory assets and deferred debits	10,426	9,372
Total Assets	119,656	114,779
Current Liabilities
Accounts payable	1,801	2,391
Notes payable and commercial paper	1,787	839
Taxes accrued	704	551
Interest accrued	476	440
Current maturities of long-term debt	1,156	2,104
Liabilities associated with assets held for sale	284	7
Regulatory liabilities	175	316
Other	1,868	1,996
Total current liabilities	8,251	8,644
Long-Term Debt	38,702	38,152
Deferred Credits and Other Liabilities
Deferred income taxes	12,989	12,097
Investment tax credits	431	442
Accrued pension and other post-retirement benefit costs	1,231	1,322
Liabilities associated with assets held for sale	57	66
Asset retirement obligations	8,499	4,950
Regulatory liabilities	6,220	5,949
Other	1,823	1,749
Total deferred credits and other liabilities	31,250	26,575
Commitments and Contingencies
Equity
Common stock	1	1
Additional paid-in capital	39,388	39,365
Retained earnings	2,479	2,363
Accumulated other comprehensive loss	(456)	(399)
Total Duke Energy Corporation stockholders' equity	41,412	41,330
Noncontrolling interests	41	78
Total equity	41,453	41,408
Total Liabilities and Equity	119,656	114,779
Duke Energy Carolinas [Member]
Current Assets
Cash and cash equivalents	34	23
Receivables (net of allowance for doubtful accounts)	123	186
Restricted receivables of variable interest entities (net of allowance for doubtful accounts)	695	673
Receivables from affiliated companies	117	75
Notes receivable from affiliated companies	339	222
Inventory	973	1,065
Regulatory assets	388	295
Other	247	309
Total current assets	2,916	2,848
Investments and Other Assets
Nuclear decommissioning trust funds	2,965	2,840
Other	975	1,000
Total investments and other assets	3,940	3,840
Property, Plant and Equipment
Cost	37,670	34,906
Accumulated depreciation and amortization	(12,544)	(11,894)
Net property, plant and equipment	25,126	23,012
Regulatory Assets and Deferred Debits
Regulatory assets	1,986	1,527
Other	42	46
Total regulatory assets and deferred debits	2,028	1,573
Total Assets	34,010	31,273
Current Liabilities
Accounts payable	514	701
Accounts payable to affiliated companies	176	161
Taxes accrued	334	147
Interest accrued	130	97
Current maturities of long-term debt	7	47
Regulatory liabilities	31	65
Other	399	393
Total current liabilities	1,591	1,611
Long-Term Debt	8,087	8,089
Long-Term Debt Payable to Affiliated Companies	300	300
Deferred Credits and Other Liabilities
Deferred income taxes	5,725	5,706
Investment tax credits	205	210
Accrued pension and other post-retirement benefit costs	149	161
Asset retirement obligations	3,691	1,594
Regulatory liabilities	2,690	2,576
Other	663	676
Total deferred credits and other liabilities	13,123	10,923
Commitments and Contingencies
Equity
Member's equity	10,922	10,365
Accumulated other comprehensive loss	(13)	(15)
Total member's equity	10,909	10,350
Total Liabilities and Equity	34,010	31,273
Progress Energy [Member]
Current Assets
Cash and cash equivalents	47	58
Receivables (net of allowance for doubtful accounts)	184	528
Restricted receivables of variable interest entities (net of allowance for doubtful accounts)	877	417
Receivables from affiliated companies	36	4
Notes receivable from affiliated companies	164	75
Inventory	1,509	1,424
Regulatory assets	566	353
Other	622	726
Total current assets	4,005	3,585
Investments and Other Assets
Nuclear decommissioning trust funds	2,409	2,292
Goodwill	3,655	3,655
Other	792	804
Total investments and other assets	6,856	6,751
Property, Plant and Equipment
Cost	37,796	36,480
Accumulated depreciation and amortization	(13,397)	(13,098)
Net property, plant and equipment	24,399	23,382
Regulatory Assets and Deferred Debits
Regulatory assets	4,818	4,155
Other	94	96
Total regulatory assets and deferred debits	4,912	4,251
Total Assets	40,172	37,969
Current Liabilities
Accounts payable	636	836
Accounts payable to affiliated companies	265	123
Notes payable to affiliated companies	822	1,213
Taxes accrued	317	105
Interest accrued	192	181
Current maturities of long-term debt	318	485
Regulatory liabilities	106	207
Other	743	896
Total current liabilities	3,399	4,046
Long-Term Debt	14,194	13,630
Deferred Credits and Other Liabilities
Deferred income taxes	3,999	3,283
Accrued pension and other post-retirement benefit costs	621	765
Asset retirement obligations	4,015	2,562
Regulatory liabilities	2,397	2,292
Other	515	527
Total deferred credits and other liabilities	11,547	9,429
Commitments and Contingencies
Equity
Common stock	0	0
Additional paid-in capital	7,467	7,467
Retained earnings	3,647	3,452
Accumulated other comprehensive loss	(51)	(59)
Total Duke Energy Corporation stockholders' equity	11,063	10,860
Noncontrolling interests	(31)	4
Total equity	11,032	10,864
Total Liabilities and Equity	40,172	37,969
Duke Energy Progress [Member]
Current Assets
Cash and cash equivalents	6	21
Receivables (net of allowance for doubtful accounts)	72	145
Restricted receivables of variable interest entities (net of allowance for doubtful accounts)	475	417
Receivables from affiliated companies	9	2
Inventory	928	853
Regulatory assets	325	127
Other	261	296
Total current assets	2,076	1,861
Investments and Other Assets
Nuclear decommissioning trust funds	1,626	1,539
Other	475	443
Total investments and other assets	2,101	1,982
Property, Plant and Equipment
Cost	23,511	22,273
Accumulated depreciation and amortization	(8,931)	(8,623)
Net property, plant and equipment	14,580	13,650
Regulatory Assets and Deferred Debits
Regulatory assets	2,187	1,384
Other	34	32
Total regulatory assets and deferred debits	2,221	1,416
Total Assets	20,978	18,909
Current Liabilities
Accounts payable	305	420
Accounts payable to affiliated companies	205	103
Notes payable to affiliated companies	122	462
Taxes accrued	149	37
Interest accrued	78	70
Current maturities of long-term debt	306	174
Regulatory liabilities	66	63
Other	344	392
Total current liabilities	1,575	1,721
Long-Term Debt	5,410	5,061
Deferred Credits and Other Liabilities
Deferred income taxes	2,729	2,557
Accrued pension and other post-retirement benefit costs	311	321
Asset retirement obligations	3,206	1,729
Regulatory liabilities	1,796	1,673
Other	159	222
Total deferred credits and other liabilities	8,201	6,502
Commitments and Contingencies
Equity
Common stock	2,159	2,159
Retained earnings	3,633	3,466
Total equity	5,792	5,625
Total Liabilities and Equity	20,978	18,909
Duke Energy Florida [Member]
Current Assets
Cash and cash equivalents	15	16
Receivables (net of allowance for doubtful accounts)	109	375
Restricted receivables of variable interest entities (net of allowance for doubtful accounts)	403
Receivables from affiliated companies	40	3
Notes receivable from affiliated companies	182
Inventory	581	571
Regulatory assets	241	221
Other	230	182
Total current assets	1,801	1,368
Investments and Other Assets
Nuclear decommissioning trust funds	783	753
Other	261	252
Total investments and other assets	1,044	1,005
Property, Plant and Equipment
Cost	14,275	13,863
Accumulated depreciation and amortization	(4,460)	(4,252)
Net property, plant and equipment	9,815	9,611
Regulatory Assets and Deferred Debits
Regulatory assets	2,631	2,729
Other	42	44
Total regulatory assets and deferred debits	2,673	2,773
Total Assets	15,333	14,757
Current Liabilities
Accounts payable	331	333
Accounts payable to affiliated companies	67	38
Notes payable to affiliated companies		181
Taxes accrued	164	66
Interest accrued	65	46
Current maturities of long-term debt	12	11
Regulatory liabilities	40	144
Other	370	445
Total current liabilities	1,049	1,264
Long-Term Debt	5,090	4,875
Deferred Credits and Other Liabilities
Deferred income taxes	2,109	1,829
Accrued pension and other post-retirement benefit costs	277	286
Asset retirement obligations	809	833
Regulatory liabilities	600	618
Other	270	255
Total deferred credits and other liabilities	4,065	3,821
Commitments and Contingencies
Equity
Common stock	1,762	1,762
Retained earnings	3,367	3,036
Accumulated other comprehensive loss		(1)
Total equity	5,129	4,797
Total Liabilities and Equity	15,333	14,757
Duke Energy Ohio [Member]
Current Assets
Cash and cash equivalents	28	36
Receivables (net of allowance for doubtful accounts)	110	121
Receivables from affiliated companies	59	121
Notes receivable from affiliated companies	235	57
Inventory	139	229
Assets held for sale	284
Regulatory assets	67	57
Other	135	270
Total current assets	1,057	891
Investments and Other Assets
Goodwill	920	920
Assets held for sale	2,682
Other	20	232
Total investments and other assets	3,622	1,152
Property, Plant and Equipment
Cost	7,155	11,143
Accumulated depreciation and amortization	(2,250)	(2,908)
Net property, plant and equipment	4,905	8,235
Regulatory Assets and Deferred Debits
Regulatory assets	480	471
Other	8	14
Total regulatory assets and deferred debits	488	485
Total Assets	10,072	10,763
Current Liabilities
Accounts payable	168	319
Accounts payable to affiliated companies	71	77
Notes payable to affiliated companies	563	43
Taxes accrued	188	167
Interest accrued	30	17
Current maturities of long-term debt	197	47
Liabilities associated with assets held for sale	269
Regulatory liabilities	10	27
Other	79	110
Total current liabilities	1,575	807
Long-Term Debt	1,586	2,141
Deferred Credits and Other Liabilities
Deferred income taxes	1,753	2,012
Accrued pension and other post-retirement benefit costs	29	58
Liabilities associated with assets held for sale	57
Asset retirement obligations	25	28
Regulatory liabilities	267	262
Other	169	186
Total deferred credits and other liabilities	2,300	2,546
Commitments and Contingencies
Equity
Common stock	762	762
Additional paid-in capital	4,782	4,882
Retained earnings	(933)	(375)
Total equity	4,611	5,269
Total Liabilities and Equity	10,072	10,763
Duke Energy Indiana [Member]
Current Assets
Cash and cash equivalents	24	15
Receivables (net of allowance for doubtful accounts)	54	22
Receivables from affiliated companies	79	151
Notes receivable from affiliated companies		96
Inventory	464	434
Regulatory assets	134	118
Other	235	125
Total current assets	990	961
Investments and Other Assets
Other	214	269
Total investments and other assets	214	269
Property, Plant and Equipment
Cost	12,918	12,489
Accumulated depreciation and amortization	(4,138)	(3,913)
Net property, plant and equipment	8,780	8,576
Regulatory Assets and Deferred Debits
Regulatory assets	670	717
Other	24	25
Total regulatory assets and deferred debits	694	742
Total Assets	10,678	10,548
Current Liabilities
Accounts payable	152	206
Accounts payable to affiliated companies	60	56
Notes payable to affiliated companies	61
Taxes accrued	51	57
Interest accrued	53	56
Current maturities of long-term debt	5	5
Regulatory liabilities	28	16
Other	116	88
Total current liabilities	526	484
Long-Term Debt	3,640	3,641
Long-Term Debt Payable to Affiliated Companies	150	150
Deferred Credits and Other Liabilities
Deferred income taxes	1,441	1,171
Investment tax credits	139	140
Accrued pension and other post-retirement benefit costs	104	163
Asset retirement obligations	30	30
Regulatory liabilities	811	782
Other	48	48
Total deferred credits and other liabilities	2,573	2,334
Commitments and Contingencies
Equity
Common stock	1	1
Additional paid-in capital	1,384	1,384
Retained earnings	2,401	2,551
Accumulated other comprehensive loss	3	3
Total equity	3,789	3,939
Total Liabilities and Equity	$ 10,678	$ 10,548