Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Current Assets [Abstract]
Cash and cash equivalents	$ 2,036	$ 1,501
Short Term Investments		44us-gaap_ShortTermInvestments
Receivables (net of allowance for doubtful accounts)	791us-gaap_ReceivablesNetCurrent	1,286us-gaap_ReceivablesNetCurrent
Restricted receivables of variable interest entities (net of allowance for doubtful accounts)	1,973	1,719
Inventory	3,459us-gaap_PublicUtilitiesInventory	3,250us-gaap_PublicUtilitiesInventory
Assets held for sale	364
Regulatory assets, current	1,115us-gaap_RegulatoryAssetsCurrent	895us-gaap_RegulatoryAssetsCurrent
Other	1,837	1,821
Total current assets	11,575us-gaap_AssetsCurrent	10,516us-gaap_AssetsCurrent
Investments and Other Assets [Abstract]
Investments in equity method unconsolidated affiliates	358	390
Nuclear decommissioning trust funds	5,546us-gaap_DecommissioningFundInvestments	5,132us-gaap_DecommissioningFundInvestments
Goodwill	16,321us-gaap_Goodwill	16,340us-gaap_Goodwill
Assets held for sale	2,642	107
Other	3,008us-gaap_OtherAssetsNoncurrent	3,432us-gaap_OtherAssetsNoncurrent
Total investments and other assets	27,875	25,401
Property, Plant and Equipment [Abstract]
Cost	104,861us-gaap_PropertyPlantAndEquipmentGross	103,115us-gaap_PropertyPlantAndEquipmentGross
Accumulated depreciation and amortization	(34,824)	(33,625)
Generation Facilities To Be Retired Net	9duk_GenerationFacilitiesToBeRetiredNet
Net property, plant and equipment	70,046us-gaap_PropertyPlantAndEquipmentNet	69,490us-gaap_PropertyPlantAndEquipmentNet
Regulatory Assets and Deferred Debits [Abstract]
Regulatory assets, noncurrent	11,042us-gaap_RegulatoryAssetsNoncurrent	9,191us-gaap_RegulatoryAssetsNoncurrent
Other	171us-gaap_UnamortizedDebtIssuanceExpense	181us-gaap_UnamortizedDebtIssuanceExpense
Total regulatory assets and deferred debits	11,213	9,372
Total Assets	120,709us-gaap_Assets	114,779us-gaap_Assets
Current Liabilities [Abstract]
Accounts payable	2,271us-gaap_AccountsPayableCurrent	2,391us-gaap_AccountsPayableCurrent
Notes payable and commercial paper	2,514us-gaap_ShortTermBorrowings	839us-gaap_ShortTermBorrowings
Taxes accrued	569us-gaap_TaxesPayableCurrent	551us-gaap_TaxesPayableCurrent
Interest accrued	418us-gaap_InterestPayableCurrent	440us-gaap_InterestPayableCurrent
Current maturities of long-term debt	2,807us-gaap_LongTermDebtCurrent	2,104us-gaap_LongTermDebtCurrent
Liabilities associated with assets held for sale	262	7
Regulatory liabilities, current	204us-gaap_RegulatoryLiabilityCurrent	316us-gaap_RegulatoryLiabilityCurrent
Other	2,188us-gaap_OtherLiabilitiesCurrent	1,996us-gaap_OtherLiabilitiesCurrent
Total current liabilities	11,233us-gaap_LiabilitiesCurrent	8,644us-gaap_LiabilitiesCurrent
Long-Term debt	37,213us-gaap_LongTermDebtNoncurrent	38,152us-gaap_LongTermDebtNoncurrent
Deferred Credits and Other Liabilities [Abstract]
Deferred income taxes	13,423	12,097
Investment tax credits	427	442
Accrued pension and other post-retirement benefit costs	1,145	1,322
Liabilities associated with assets held for sale	35	66
Asset retirement obligations	8,466	4,950
Regulatory liabilities - noncurrent	6,193us-gaap_RegulatoryLiabilityNoncurrent	5,949us-gaap_RegulatoryLiabilityNoncurrent
Other	1,675	1,749
Total deferred credits and other liabilities	31,364	26,575
Commitments and Contingencies
Equity [Abstract]
Common stock	1us-gaap_CommonStockValue	1us-gaap_CommonStockValue
Additional paid-in capital	39,405	39,365
Retained earnings	2,012	2,363
Accumulated other comprehensive (loss) income	(543)	(399)
Total Common Shareholders' Equity	40,875us-gaap_StockholdersEquity	41,330us-gaap_StockholdersEquity
Noncontrolling interests	24us-gaap_MinorityInterest	78us-gaap_MinorityInterest
Total equity	40,899	41,408
Total Liabilities and Equity	120,709	114,779
Duke Energy Carolinas [Member]
Current Assets [Abstract]
Cash and cash equivalents	13	23
Receivables (net of allowance for doubtful accounts)	129	186
Restricted receivables of variable interest entities (net of allowance for doubtful accounts)	647	673
Receivables from affiliated companies	75	75
Notes Receivable, Related Parties, Current	150	222
Inventory	1,124	1,065
Regulatory assets, current	399	295
Other	77	309
Total current assets	2,614	2,848
Investments and Other Assets [Abstract]
Nuclear decommissioning trust funds	3,042	2,840
Other	959	1,000
Total investments and other assets	4,001	3,840
Property, Plant and Equipment [Abstract]
Cost	37,372	34,906
Accumulated depreciation and amortization	(12,700)	(11,894)
Net property, plant and equipment	24,672	23,012
Regulatory Assets and Deferred Debits [Abstract]
Regulatory assets, noncurrent	2,465	1,527
Other	42	46
Total regulatory assets and deferred debits	2,507	1,573
Total Assets	33,794	31,273
Current Liabilities [Abstract]
Accounts payable	709	701
Accounts payable to affiliated companies	154	161
Taxes accrued	146	147
Interest accrued	95	97
Current maturities of long-term debt	507	47
Regulatory liabilities, current	34	65
Other	434	393
Total current liabilities	2,079	1,611
Long-Term debt	7,584	8,089
Long-term debt payable to affiliated companies	300	300
Deferred Credits and Other Liabilities [Abstract]
Deferred income taxes	5,812	5,706
Investment tax credits	204	210
Accrued pension and other post-retirement benefit costs	111	161
Asset retirement obligations	3,428	1,594
Regulatory liabilities - noncurrent	2,710	2,576
Other	642	676
Total deferred credits and other liabilities	12,907	10,923
Commitments and Contingencies
Equity [Abstract]
Member's equity	10,937	10,365
Accumulated other comprehensive (loss) income	(13)	(15)
Total Member's Equity	10,924	10,350
Total Liabilities and Equity	33,794	31,273
Progress Energy [Member]
Current Assets [Abstract]
Cash and cash equivalents	42	58
Receivables (net of allowance for doubtful accounts)	129	528
Restricted receivables of variable interest entities (net of allowance for doubtful accounts)	741	417
Receivables from affiliated companies	59	4
Notes Receivable, Related Parties, Current	220	75
Inventory	1,590	1,424
Regulatory assets, current	491	353
Other	1,285	726
Total current assets	4,557	3,585
Investments and Other Assets [Abstract]
Nuclear decommissioning trust funds	2,503	2,292
Goodwill	3,655	3,655
Other	670	804
Total investments and other assets	6,828	6,751
Property, Plant and Equipment [Abstract]
Cost	38,650	36,480
Accumulated depreciation and amortization	(13,506)	(13,098)
Net property, plant and equipment	25,144	23,382
Regulatory Assets and Deferred Debits [Abstract]
Regulatory assets, noncurrent	5,408	4,155
Other	91	96
Total regulatory assets and deferred debits	5,499	4,251
Total Assets	42,028	37,969
Current Liabilities [Abstract]
Accounts payable	847	836
Accounts payable to affiliated companies	203	123
Notes payable to affiliated companies	835	1,213
Taxes accrued	114	105
Interest accrued	184	181
Current maturities of long-term debt	1,507	485
Regulatory liabilities, current	106	207
Other	1,021	896
Total current liabilities	4,817	4,046
Long-Term debt	13,247	13,630
Deferred Credits and Other Liabilities [Abstract]
Deferred income taxes	4,759	3,283
Accrued pension and other post-retirement benefit costs	533	765
Asset retirement obligations	4,711	2,562
Regulatory liabilities - noncurrent	2,379	2,292
Other	406	527
Total deferred credits and other liabilities	12,788	9,429
Commitments and Contingencies
Equity [Abstract]
Common stock	0	0
Additional paid-in capital	7,467	7,467
Retained earnings	3,782	3,452
Accumulated other comprehensive (loss) income	(41)	(59)
Total Common Shareholders' Equity	11,208	10,860
Noncontrolling interests	(32)	4
Total equity	11,176	10,864
Total Liabilities and Equity	42,028	37,969
Duke Energy Progress [Member]
Current Assets [Abstract]
Cash and cash equivalents	9	21
Receivables (net of allowance for doubtful accounts)	43	145
Restricted receivables of variable interest entities (net of allowance for doubtful accounts)	436	417
Receivables from affiliated companies	10	2
Notes Receivable, Related Parties	237
Inventory	966	853
Regulatory assets, current	287	127
Other	384	296
Total current assets	2,372	1,861
Investments and Other Assets [Abstract]
Nuclear decommissioning trust funds	1,701	1,539
Other	412	443
Total investments and other assets	2,113	1,982
Property, Plant and Equipment [Abstract]
Cost	24,207	22,273
Accumulated depreciation and amortization	(9,021)	(8,623)
Net property, plant and equipment	15,186	13,650
Regulatory Assets and Deferred Debits [Abstract]
Regulatory assets, noncurrent	2,675	1,384
Other	34	32
Total regulatory assets and deferred debits	2,709	1,416
Total Assets	22,380	18,909
Current Liabilities [Abstract]
Accounts payable	481	420
Accounts payable to affiliated companies	120	103
Notes payable to affiliated companies		462
Taxes accrued	47	37
Interest accrued	81	70
Current maturities of long-term debt	945	174
Regulatory liabilities, current	71	63
Other	409	392
Total current liabilities	2,154	1,721
Long-Term debt	5,256	5,061
Deferred Credits and Other Liabilities [Abstract]
Deferred income taxes	2,908	2,557
Accrued pension and other post-retirement benefit costs	290	321
Asset retirement obligations	3,905	1,729
Regulatory liabilities - noncurrent	1,832	1,673
Other	168	222
Total deferred credits and other liabilities	9,103	6,502
Equity [Abstract]
Common stock	2,159	2,159
Retained earnings	3,708	3,466
Total equity	5,867	5,625
Total Liabilities and Equity	22,380	18,909
Duke Energy Florida [Member]
Current Assets [Abstract]
Cash and cash equivalents	8	16
Receivables (net of allowance for doubtful accounts)	84	375
Restricted receivables of variable interest entities (net of allowance for doubtful accounts)	305
Receivables from affiliated companies	40	3
Inventory	623	571
Regulatory assets, current	203	221
Other	521	182
Total current assets	1,784	1,368
Investments and Other Assets [Abstract]
Nuclear decommissioning trust funds	803	753
Other	204	252
Total investments and other assets	1,007	1,005
Property, Plant and Equipment [Abstract]
Cost	14,433	13,863
Accumulated depreciation and amortization	(4,478)	(4,252)
Net property, plant and equipment	9,955	9,611
Regulatory Assets and Deferred Debits [Abstract]
Regulatory assets, noncurrent	2,733	2,729
Other	39	44
Total regulatory assets and deferred debits	2,772	2,773
Total Assets	15,518	14,757
Current Liabilities [Abstract]
Accounts payable	365	333
Accounts payable to affiliated companies	70	38
Notes payable to affiliated companies	84	181
Taxes accrued	65	66
Interest accrued	47	46
Current maturities of long-term debt	562	11
Regulatory liabilities, current	35	144
Other	586	445
Total current liabilities	1,814	1,264
Long-Term debt	4,298	4,875
Deferred Credits and Other Liabilities [Abstract]
Deferred income taxes	2,452	1,829
Accrued pension and other post-retirement benefit costs	221	286
Asset retirement obligations	806	833
Regulatory liabilities - noncurrent	547	618
Other	158	255
Total deferred credits and other liabilities	4,184	3,821
Commitments and Contingencies
Equity [Abstract]
Common stock	1,762	1,762
Retained earnings	3,460	3,036
Accumulated other comprehensive (loss) income	0	(1)
Total equity	5,222	4,797
Total Liabilities and Equity	15,518	14,757
Duke Energy Ohio [Member]
Current Assets [Abstract]
Cash and cash equivalents	20	36
Receivables (net of allowance for doubtful accounts)	93	121
Receivables from affiliated companies	107	121
Notes Receivable, Related Parties, Current	145	57
Inventory	97	229
Assets held for sale	316
Regulatory assets, current	49	57
Other	167	270
Total current assets	994	891
Investments and Other Assets [Abstract]
Goodwill	920	920
Assets held for sale	2,605
Other	23	232
Total investments and other assets	3,548	1,152
Property, Plant and Equipment [Abstract]
Cost	7,141	11,143
Accumulated depreciation and amortization	(2,213)	(2,908)
Generation Facilities To Be Retired Net	9
Net property, plant and equipment	4,937	8,235
Regulatory Assets and Deferred Debits [Abstract]
Regulatory assets, noncurrent	512	471
Other	8	14
Total regulatory assets and deferred debits	520	485
Total Assets	9,999	10,763
Current Liabilities [Abstract]
Accounts payable	209	319
Accounts payable to affiliated companies	74	77
Notes payable to affiliated companies	491	43
Taxes accrued	163	167
Interest accrued	19	17
Current maturities of long-term debt	157	47
Liabilities associated with assets held for sale	246
Regulatory liabilities, current	10	27
Other	66	110
Total current liabilities	1,435	807
Long-Term debt	1,584	2,141
Long-term debt payable to affiliated companies	25
Deferred Credits and Other Liabilities [Abstract]
Deferred income taxes	1,765	2,012
Accrued pension and other post-retirement benefit costs	48	58
Liabilities associated with assets held for sale	34
Asset retirement obligations	27	28
Regulatory liabilities - noncurrent	241	262
Other	166	186
Total deferred credits and other liabilities	2,281	2,546
Equity [Abstract]
Common stock	762	762
Additional paid-in capital	4,782	4,882
Retained earnings	(870)	(375)
Total equity	4,674	5,269
Total Liabilities and Equity	9,999	10,763
Duke Energy Indiana [Member]
Current Assets [Abstract]
Cash and cash equivalents	6	15
Receivables (net of allowance for doubtful accounts)	87	22
Receivables from affiliated companies	115	151
Notes Receivable, Related Parties, Current		96
Inventory	537	434
Regulatory assets, current	93	118
Other	326	125
Total current assets	1,164	961
Investments and Other Assets [Abstract]
Other	251	269
Total investments and other assets	251	269
Property, Plant and Equipment [Abstract]
Cost	13,034	12,489
Accumulated depreciation and amortization	(4,219)	(3,913)
Net property, plant and equipment	8,815	8,576
Regulatory Assets and Deferred Debits [Abstract]
Regulatory assets, noncurrent	685	717
Other	24	25
Total regulatory assets and deferred debits	709	742
Total Assets	10,939	10,548
Current Liabilities [Abstract]
Accounts payable	179	206
Accounts payable to affiliated companies	58	56
Notes payable to affiliated companies	71
Taxes accrued	54	57
Interest accrued	56	56
Current maturities of long-term debt	5	5
Regulatory liabilities, current	54	16
Other	98	88
Total current liabilities	575	484
Long-Term debt	3,636	3,641
Long-term debt payable to affiliated companies	150	150
Deferred Credits and Other Liabilities [Abstract]
Deferred income taxes	1,591	1,171
Investment tax credits	139	140
Accrued pension and other post-retirement benefit costs	82	163
Asset retirement obligations	32	30
Regulatory liabilities - noncurrent	796	782
Other	90	48
Total deferred credits and other liabilities	2,730	2,334
Commitments and Contingencies
Equity [Abstract]
Common stock	1	1
Additional paid-in capital	1,384	1,384
Retained earnings	2,460	2,551
Accumulated other comprehensive (loss) income	3	3
Total equity	3,848	3,939
Total Liabilities and Equity	$ 10,939	$ 10,548

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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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The remaining balance of debt issuance expenses that were capitalized and are being amortized against income over the lives of the respective bond issues. This does not include the amounts capitalized as part of the cost of the utility plant or asset.

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