Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2014

Public Utilities, General Disclosures [Line Items]

Schedule of Regulatory Assets

The following tables present the regulatory assets and liabilities recorded on the Consolidated Balance Sheets.

	December 31, 2014
(in millions)	Duke Energy		Duke Energy Carolinas		Progress Energy		Duke Energy Progress		Duke Energy Florida		Duke Energy Ohio		Duke Energy Indiana
Regulatory Assets
Asset retirement obligations	$	3,017	$	907	$	1,882	$	1,584	$	298	$	—	$	—
Accrued pension and OPEB	2,015		412		812		354		458		132		217
Retired generation facilities	1,659		58		1,545		152		1,393		—		56
Debt fair value adjustment	1,305		—		—		—		—		—		—
Net regulatory asset related to income taxes	1,144		614		354		141		213		64		111
Hedge costs and other deferrals	628		103		490		217		273		7		28
Demand side management (DSM)/Energy efficiency (EE)	330		106		203		193		10		21		—
Grid Modernization	76		—		—		—		—		76		—
Vacation accrual	213		86		46		46		—		6		12
Deferred fuel	246		50		182		138		44		9		5
Nuclear deferral	296		141		155		43		112		—		—
Post-in-service carrying costs and deferred operating expenses	494		124		121		28		93		21		228
Gasification services agreement buyout	55		—		—		—		—		—		55
Transmission expansion obligation	70		—		—		—		—		74		—
Manufactured gas plant (MGP)	115		—		—		—		—		115		—
Other	494		263		109		66		42		36		66
Total regulatory assets	12,157		2,864		5,899		2,962		2,936		561		778
Less: current portion	1,115		399		491		287		203		49		93
Total non-current regulatory assets	$	11,042	$	2,465	$	5,408	$	2,675	$	2,733	$	512	$	685

	December 31, 2013
(in millions)	Duke Energy		Duke Energy Carolinas		Progress Energy		Duke Energy Progress		Duke Energy Florida		Duke Energy Ohio		Duke Energy Indiana
Regulatory Assets
Asset retirement obligations	$	1,608	$	123	786		$	389	$	397	$	—	$	—
Accrued pension and OPEB	1,723		347		750		269		438		120		219
Retired generation facilities	1,748		68		1,619		241		1,378		—		61
Debt fair value adjustment	1,338		—		—		—		—		—		—
Net regulatory asset related to income taxes	1,115		555		331		113		218		72		157
Hedge costs and other deferrals	450		98		318		165		153		5		29
DSM/EE	306		140		152		140		12		14		—
Grid Modernization	65		—		—		—		—		65		—
Vacation accrual	210		82		55		50		—		7		13
Deferred fuel	94		—		37		6		31		14		43
Nuclear deferral	262		40		222		77		145		—		—
Post-in-service carrying costs and deferred operating expenses	459		150		137		19		118		21		151
Gasification services agreement buyout	75		—		—		—		—		—		75
Transmission expansion obligation	70		—		—		—		—		74		—
MGP	90		—		—		—		—		90		—
Other	473		219		101		42		60		46		87
Total regulatory assets	10,086		1,822		4,508		1,511		2,950		528		835
Less: current portion	895		295		353		127		221		57		118
Total non-current regulatory assets	$	9,191	$	1,527	$	4,155	$	1,384	$	2,729	$	471	$	717

Schedule Of Regulatory Liabilities

	December 31, 2013
(in millions)	Duke Energy		Duke Energy Carolinas		Progress Energy		Duke Energy Progress		Duke Energy Florida		Duke Energy Ohio		Duke Energy Indiana
Regulatory Liabilities
Costs of removal	$	5,308	$	2,423	$	2,008	$	1,637	$	371	$	241	$	645
Amounts to be refunded to customers	151		—		120		—		120		—		31
Storm reserve	145		20		125		—		125		—		—
Accrued pension and OPEB	138		—		—		—		—		21		77
Deferred fuel	177		45		132		—		132		—		—
Other	346		153		114		99		14		27		45
Total regulatory liabilities	6,265		2,641		2,499		1,736		762		289		798
Less: current portion	316		65		207		63		144		27		16
Total non-current regulatory liabilities	$	5,949	$	2,576	$	2,292	$	1,673	$	618	$	262	$	782

	December 31, 2014
(in millions)	Duke Energy		Duke Energy Carolinas		Progress Energy		Duke Energy Progress		Duke Energy Florida		Duke Energy Ohio		Duke Energy Indiana
Regulatory Liabilities
Costs of removal	$	5,221	$	2,420	$	1,975	$	1,692	$	283	$	222	$	613
Amounts to be refunded to customers	166		—		70		—		70		—		96
Storm reserve	150		25		125		—		125		—		—
Accrued pension and OPEB	379		76		121		61		60		19		91
Deferred fuel	37		6		23		23		—		—		8
Other	444		217		171		127		44		10		42
Total regulatory liabilities	6,397		2,744		2,485		1,903		582		251		850
Less: current portion	204		34		106		71		35		10		54
Total non-current regulatory liabilities	$	6,193	$	2,710	$	2,379	$	1,832	$	547	$	241	$	796

Schedule of Potential Plant Retirements

The table below contains the net carrying value of generating facilities planned for early retirement or being evaluated for potential retirement included in Net property, plant and equipment on the Consolidated Balance Sheets, excluding the Duke Energy Carolinas 170 MW Lee Unit 3 which is being converted to gas in 2015.

	December 31, 2014
	Duke Energy		Progress Energy(b)		Duke Energy Florida(b)		Duke Energy Ohio(c)		Duke EnergyIndiana(d)
Capacity (in MW)	1,704		873		873		163		668
Remaining net book value (in millions)(a)	$	239	$	114	$	114	$	9	$	116

(a) Included in Net property, plant and equipment as of December 31, 2014, on the Consolidated Balance Sheets.

(b) Includes Crystal River Units 1 and 2. 

(c) Includes Miami Fort Unit 6 which is expected to be retired by June 1, 2015. 

(d) Includes Wabash River Units 2 through 6. Wabash River Unit 6 is being evaluated for potential conversion to gas. Duke Energy Indiana committed to retire or convert these units by June 2018 in conjunction with a settlement agreement associated with the Edwardsport air permit.

Duke Energy Ohio [Member]

Public Utilities, General Disclosures [Line Items]

Schedule of MISO Exit Fee Obligations

The following table provides a reconciliation of the beginning and ending balance of Duke Energy Ohio’s recorded obligations related to its withdrawal from MISO. As of December 31, 2014, $74 million is recorded as a Regulatory asset on Duke Energy Ohio's Consolidated Balance Sheets.

(in millions)	December 31, 2013		Provision / Adjustments		Cash Reductions			December 31, 2014
Duke Energy Ohio	$	95	$	3	$	(4	)	$	94