Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2014

Defined Benefit Plan Disclosure [Line Items]

Pension Plan Contributions

Duke Energy’s policy is to fund amounts on an actuarial basis to provide assets sufficient to meet benefit payments to be paid to plan participants. The following table includes information related to the Duke Energy Registrants’ contributions to its U.S. qualified defined benefit pension plans.

(in millions)	Duke Energy		Duke Energy Carolinas		Progress Energy		Duke Energy Progress		Duke Energy Florida		Duke Energy Ohio		Duke Energy Indiana
Anticipated Contributions:
2015	$	302	$	91	$	83	$	42	$	40	$	8	$	19
Contributions Made:
2014	$	—	$	—	$	—	$	—	$	—	$	—	$	—
2013	250		—		250		63		133		—		—
2012	304		—		346		141		128		—		—

Employee Savings Plan Matching Contributions

The following table includes pretax employer matching contributions made by Duke Energy and expensed by the Subsidiary Registrants.

(in millions)	Duke Energy		Duke Energy Carolinas		Progress Energy		Duke Energy Progress		Duke Energy Florida		Duke Energy Ohio		Duke Energy Indiana
Years ended December 31,
2014(a)	$	143	$	47	$	43	$	30	$	14	$	3	$	7
2013	134		45		45		25		14		3		7
2012	107		37		45		24		15		4		6

(a) For 2014, amounts include the additional employer contribution of 4 percent of eligible pay per pay period for employees not eligible to participate in a defined benefit plan.

Master Trust [Member]

Defined Benefit Plan Disclosure [Line Items]

Fair Value and Allocation of Plan Assets

The following tables provide the fair value measurement amounts for the Duke Energy Master Retirement Trust qualified pension and other post-retirement assets.

	December 31, 2014
(in millions)	Total Fair Value		Level 1			Level 2		Level 3
Equity securities	$	2,346	$	1,625		$	721	$	—
Corporate debt securities	4,349		—			4,348		1
Short-term investment funds	333		171			162		—
Partnership interests	298		—			—		298
Hedge funds	146		—			146		—
Real estate limited partnerships	104		—			—		104
U.S. government securities	917		—			916		1
Guaranteed investment contracts	32		—			—		32
Governments bonds - foreign	44		—			44		—
Cash	30		30			—		—
Government and commercial mortgage backed securities	9		—			9		—
Net pending transactions and other investments	10		(10		)	20		—
Total assets(a)	$	8,618	$	1,816		$	6,366	$	436

(a) Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida, Duke Energy Ohio and Duke Energy Indiana were allocated approximately 28 percent, 31 percent, 15 percent, 16 percent, 5 percent and 8 percent, respectively, of the Duke Energy Master Retirement Trust assets at December 31, 2014. Accordingly, all Level 1, 2 and 3 amounts included in the table above are allocable to the Subsidiary Registrants using these percentages.

	December 31, 2013
(in millions)	Total Fair Value		Level 1		Level 2		Level 3
Equity securities	$	2,877	$	1,801	$	1,022	$	54
Corporate debt securities	2,604		—		2,601		3
Short-term investment funds	1,158		254		904		—
Partnership interests	307		—		—		307
Hedge funds	164		—		111		53
Real estate limited partnerships	95		—		—		95
U.S. government securities	927		—		927		—
Guarantees investment contracts	33		—		—		33
Governments bonds - foreign	19		—		18		1
Cash	58		58		—		—
Asset backed securities	7		—		7		—
Net pending transactions and other investments	12		7		5		—
Total assets(a)	$	8,261	$	2,120	$	5,595	$	546

(a) Duke Energy Carolinas, Progress Energy, Duke Energy Progress, Duke Energy Florida, Duke Energy Ohio and Duke Energy Indiana were allocated approximately 28 percent, 35 percent, 16 percent, 16 percent, 5 percent and 8 percent, respectively, of the Duke Energy Master Retirement Trust assets at December 31, 2013. Accordingly, all Level 1, 2 and 3 amounts included in the table above are allocable to the Subsidiary Registrants using these percentages.

The following table includes the target asset allocations by asset class at December 31, 2014 and the actual asset allocations for the Duke Energy Master Retirement Trust.

			Actual Allocation at December 31,
	Target Allocation		2014		2013
U.S. equity securities	10	%	10	%	10	%
Non-U.S. equity securities	8	%	8	%	8	%
Global equity securities	10	%	10	%	10	%
Global private equity securities	3	%	3	%	3	%
Debt securities	63	%	63	%	63	%
Hedge funds	2	%	3	%	3	%
Real estate and cash	2	%	1	%	1	%
Other global securities	2	%	2	%	2	%
Total	100	%	100	%	100	%

Master Trust Level 3 Rollforward

The following table provides a reconciliation of beginning and ending balances of assets of master trusts measured at fair value on a recurring basis where the determination of fair value includes significant unobservable inputs (Level 3).

(in millions)	2014			2013
Balance at January 1	$	546		$	352
Combination of trust assets(a)	—			288
Purchases, sales, issuances and settlements
Purchases	17			25
Sales	(164		)	(152		)
Total gains (losses) and other, net	37			33
Balance at December 31	$	436		$	546

(a) As of January 1, 2013, assets previously held in the Progress Energy Master Retirement Trust were transferred into the Duke Energy Master Retirement Trust.

Voluntary Employee Beneficiary Association [Member]

Defined Benefit Plan Disclosure [Line Items]

Fair Value and Allocation of Plan Assets

The following table presents target and actual asset allocations for VEBA I at December 31, 2014.

			Actual Allocation at December 31,
	Target Allocation		2014		2013
U.S. equity securities	30	%	29	%	29	%
Debt securities	45	%	28	%	29	%
Cash	25	%	43	%	42	%
Total	100	%	100	%	100	%

The following tables provide the fair value measurement amounts for VEBA I other post-retirement assets.

	December 31, 2014
(in millions)	Total Fair Value		Level 1	Level 2		Level 3
Cash and cash equivalents	$	21	—	$	21	—
Equity securities	14		—	14		—
Debt securities	13		—	13		—
Total assets	$	48	—	$	48	—

	December 31, 2013
(in millions)	Total Fair Value		Level 1	Level 2		Level 3
Cash and cash equivalents	$	21	—	$	21	—
Equity securities	15		—	15		—
Debt securities	15		—	15		—
Total assets	$	51	—	$	51	—

Qualified Pension Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Components of Net Periodic Pension Costs

Components of Net Periodic Pension Costs

	Year Ended December 31, 2014
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress			Duke Energy Florida			Duke Energy Ohio			Duke Energy Indiana
Service cost	$	135		$	41		$	40		$	21		$	20		$	4		$	9
Interest cost on projected benefit obligation	344			85			112			54			57			20			29
Expected return on plan assets	(511		)	(132		)	(173		)	(85		)	(85		)	(27		)	(41		)
Amortization of actuarial loss	150			36			68			32			32			4			13
Amortization of prior service credit	(15		)	(8		)	(3		)	(2		)	(1		)	—			—
Other	8			2			3			1			1			—			1
Net periodic pension costs	$	111		$	24		$	47		$	21		$	24		$	1		$	11

	Year Ended December 31, 2013
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress			Duke Energy Florida			Duke Energy Ohio			Duke Energy Indiana
Service cost	$	167		$	49		$	60		$	22		$	30		$	6		$	11
Interest cost on projected benefit obligation	320			80			116			50			53			21			28
Expected return on plan assets	(549		)	(148		)	(199		)	(94		)	(87		)	(31		)	(46		)
Amortization of actuarial loss	244			60			101			46			49			13			24
Amortization of prior service (credit) cost	(11		)	(6		)	(4		)	(1		)	(2		)	—			1
Other	7			2			2			1			1			—			1
Net periodic pension costs	$	178		$	37		$	76		$	24		$	44		$	9		$	19

	Year Ended December 31, 2012
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress			Duke Energy Florida			Duke Energy Ohio			Duke Energy Indiana
Service cost	$	122		$	35		$	63		$	25		$	30		$	6		$	9
Interest cost on projected benefit obligation	307			90			127			58			56			31			30
Expected return on plan assets	(472		)	(146		)	(188		)	(96		)	(81		)	(45		)	(46		)
Amortization of actuarial loss	144			45			93			37			48			10			15
Amortization of prior service cost (credit)	10			1			9			8			(1		)	1			1
Other	6			2			2			1			1			—			—
Net periodic pension costs	$	117		$	27		$	106		$	33		$	53		$	3		$	9

Amounts Recognized in AOCI and Regulatory Assets and Liabilities

Amounts Recognized in Accumulated Other Comprehensive Income and Regulatory Assets

	Year Ended 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, net increase (decrease)	$	112		$	30	$	(73	)	$	(17	)	$	11	$	17	$	4
Accumulated other comprehensive (income) loss
Deferred income tax expense	$	(10	)	—		(2		)	—			—		—		—
Actuarial losses arising during the year	29			—		—			—			—		—		—
Prior year service credit arising during the year	—			—		—			—			—		—		—
Amortization of prior year actuarial losses	(9		)	—		—			—			—		—		—
Reclassification of actuarial losses to regulatory assets	(1		)	—		—			—			—		—		—
Net amount recognized in accumulated other comprehensive income	$	9		$	—	$	(2	)	$	—		$	—	$	—	$	—

	Year Ended 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, net decrease	$	(788	)	$	(205	)	$	(253	)	$	(109	)	$	(146	)	$	(96	)	$	(99	)
Accumulated other comprehensive (income) loss
Deferred income tax benefit	$	18		$	—		$	—		$	—		$	—		$	—		$	—
Actuarial gains arising during the year	(33		)	—			(2		)	—			—			—			—
Prior year service credit arising during the year	(1		)	—			—			—			—			—			—
Amortization of prior year actuarial losses	(15		)	—			(3		)	—			—			—			—
Reclassification of actuarial losses to regulatory assets	3			—			—			—			—			—			—
Net amount recognized in accumulated other comprehensive income	$	(28	)	$	—		$	(5	)	$	—		$	—		$	—		$	—

Reconciliation of Funded Status to Net Amount Recognized

Reconciliation of Funded Status to Net Amount Recognized

	Year Ended December 31, 2014
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress			Duke Energy Florida			Duke Energy Ohio			Duke Energy Indiana
Change in Projected Benefit Obligation
Obligation at prior measurement date	$	7,510		$	1,875		$	2,739		$	1,172		$	1,233		$	442		$	632
Service cost	135			41			40			21			20			4			9
Interest cost	344			85			112			54			57			20			29
Actuarial loss(a)	618			132			211			98			105			41			41
Transfers	—			37			(375		)	(61		)	(9		)	(6		)	—
Plan amendments	(4		)	(1		)	—			—			—			(1		)	—
Benefits paid	(496		)	(116		)	(170		)	(97		)	(71		)	(31		)	(38		)
Obligation at measurement date	$	8,107		$	2,053		$	2,557		$	1,187		$	1,335		$	469		$	673
Accumulated Benefit Obligation at measurement date	$	7,966		$	2,052		$	2,519		$	1,187		$	1,297		$	459		$	645
Change in Fair Value of Plan Assets
Plan assets at prior measurement date	$	8,142		$	2,162		$	2,944		$	1,330		$	1,299		$	448		$	654
Actual return on plan assets	852			217			300			149			144			45			65
Benefits paid	(496		)	(116		)	(170		)	(97		)	(71		)	(31		)	(38		)
Transfers	—			37			(352		)	(61		)	(9		)	(6		)	—
Plan assets at measurement date	$	8,498		$	2,300		$	2,722		$	1,321		$	1,363		$	456		$	681
Funded status of plan	$	391		$	247		$	165		$	134		$	28		$	(13	)	$	8

(a) Includes an increase in benefit obligation of $180 million as a result of changes in Duke Energy's mortality assumptions.

	Year Ended December 31, 2013
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress			Duke Energy Florida			Duke Energy Ohio			Duke Energy Indiana
Change in Projected Benefit Obligation
Obligation at prior measurement date	8,030			2,028			2,868			1,264			1,309			527			684
Service cost	167			49			60			22			30			6			11
Interest cost	320			80			116			50			53			21			28
Actuarial gains	(399		)	(73		)	(118		)	(26		)	(75		)	(71		)	(56		)
Transfers	—			(26		)	(7		)	(45		)	(17		)	(2		)	(2		)
Plan amendments	(41		)	(13		)	(19		)	(8		)	(7		)	—			—
Benefits paid	(567		)	(170		)	(161		)	(85		)	(60		)	(39		)	(33		)
Obligation at measurement date	7,510			1,875			2,739			1,172			1,233			442			632
Accumulated Benefit Obligation at measurement date	7,361			1,875			2,698			1,172			1,192			429			608
Change in Fair Value of Plan Assets
Plan assets at prior measurement date	7,754			2,151			2,647			1,289			1,150			446			627
Actual return on plan assets	705			207			215			108			93			43			62
Benefits paid	(567		)	(170		)	(161		)	(85		)	(60		)	(39		)	(33		)
Transfers	—			(26		)	(7		)	(45		)	(17		)	(2		)	(2		)
Employer contributions	250			—			250			63			133			—			—
Plan assets at measurement date	$	8,142		$	2,162		$	2,944		$	1,330		$	1,299		$	448		$	654
Funded status of plan	$	632		$	287		$	205		$	158		$	66		$	6		$	22

Amounts Recognized in the Consolidated Balance Sheet

Amounts Recognized in 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
Prefunded pension(a)	$	441		$	247		$	165		$	134		$	28		$	—		$	8
Non-current pension liability(b)	$	50		$	—		$	—		$	—		$	—		$	13		$	—
Net asset recognized	$	391		$	247		$	165		$	134		$	28		$	(13	)	$	8
Regulatory assets	$	1,711		$	407		$	753		$	346		$	406		$	65		$	151
Accumulated other comprehensive (income) loss
Deferred income tax asset	$	(51	)	$	—		$	(11	)	$	—		$	—		$	—		$	—
Prior service credit	(5		)	—			—			—			—			—			—
Net actuarial loss	140			—			21			—			—			—			—
Net amounts recognized in accumulated other comprehensive loss(c)	$	84		$	—		$	10		$	—		$	—		$	—		$	—
Amounts to be recognized in net periodic pension expense in the next year
Unrecognized net actuarial loss	$	166		$	39		$	65		$	34		$	31		$	6		$	14
Unrecognized prior service credit	(15		)	(8		)	(3		)	(2		)	(1		)	—			—

	December 31, 2013
(in millions)	Duke Energy			Duke Energy Carolinas		Progress Energy			Duke Energy Progress		Duke Energy Florida		Duke Energy Ohio			Duke Energy Indiana
Prefunded pension(a)	$	632		$	287	$	230		$	158	$	66	$	2		$	75
Non-current pension liability(b)	$	—		$	—	$	25		$	—	$	—	$	(4	)	$	53
Net asset recognized	$	632		$	287	$	205		$	158	$	66	$	6		$	22
Regulatory assets	$	1,599		$	377	$	826		$	363	$	395	$	48		$	147
Accumulated other comprehensive (income) loss
Deferred income tax asset	$	(41	)	$	—	$	(9	)	$	—	$	—	$	—		$	—
Prior service credit	(5		)	—		—			—		—		—			—
Net actuarial loss	121			—		21			—		—		—			—
Net amounts recognized in accumulated other comprehensive loss(c)	$	75		$	—	$	12		$	—	$	—	$	—		$	—

(a) Included in Other within Investments and Other Assets on the Consolidated Balance Sheets.

(b) Included in Accrued pension and other post-retirement benefit costs on the Consolidated Balance Sheets.

(c) Excludes accumulated other comprehensive income of $22 million and $16 million as of 2014 and 2013, respectively, net of tax, associated with a Brazilian retirement plan.

Information for Plans with Accumulated Benefit Obligation in Excess of Plan Assets

Information for Plans with Accumulated Benefit Obligation in Excess of Plan Assets

	December 31, 2014
(in millions)	Duke Energy		Duke Energy Ohio
Projected benefit obligation	$	702	$	315
Accumulated benefit obligation	672		306
Fair value of plan assets	652		302

Assumptions Used for Pension Benefits Accounting

The following tables present the assumptions or range of assumptions used for pension benefit accounting.

	December 31,
	2014				2013				2012(a)
Benefit Obligations
Discount rate				4.10%				4.70%				4.10%
Salary increase	4.00	%	-	4.40%	4.00	%	-	4.40%	4.00	%	-	4.30%
Net Periodic Benefit Cost
Discount rate				4.70%				4.10%	4.60	%	-	5.10%
Salary increase	4.00	%	-	4.40%	4.00	%	-	4.30%	4.00	%	-	4.40%
Expected long-term rate of return on plan assets				6.75%				7.75%	8.00	%	-	8.25%

(a) For Progress Energy plans, the assumptions used in 2012 to determine net periodic pension costs reflect remeasurement as of July 1, 2012, due to the merger between Duke Energy and Progress Energy.

Expected Benefit Payments

Expected Benefit Payments

(in millions)	Duke Energy		Duke Energy Carolinas		Progress Energy		Duke Energy Progress		Duke Energy Florida		Duke Energy Ohio		Duke Energy Indiana
Years ending December 31,
2015	$	584	$	175	$	150	$	80	$	67	$	34	$	45
2016	604		184		158		85		70		35		46
2017	616		195		161		86		73		34		45
2018	625		200		165		87		76		34		46
2019	626		194		168		88		78		34		46
2020 - 2024	3,107		924		868		437		420		168		229

Non-Qualified Pension Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Components of Net Periodic Pension Costs

Components of Net Periodic Pension Costs

	Year Ended December 31, 2014
(in millions)	Duke Energy			Duke Energy Carolinas		Progress Energy			Duke Energy Progress		Duke Energy Florida		Duke Energy Ohio		Duke Energy Indiana
Service cost	$	3		$	—	$	1		$	1	$	—	$	—	$	—
Interest cost on projected benefit obligation	14			1		5			1		2		—		—
Amortization of actuarial loss	3			—		2			—		—		—		—
Amortization of prior service credit	(1		)	—		(1		)	—		—		—		—
Net periodic pension costs	$	19		$	1	$	7		$	2	$	2	$	—	$	—

	Year Ended December 31, 2013
(in millions)	Duke Energy			Duke Energy Carolinas		Progress Energy			Duke Energy Progress		Duke Energy Florida		Duke Energy Ohio		Duke Energy Indiana
Service cost	$	3		$	—	$	1		$	1	$	—	$	—	$	—
Interest cost on projected benefit obligation	13			1		7			1		1		—		—
Amortization of actuarial loss	5			—		3			1		1		—		—
Amortization of prior service credit	(1		)	—		(1		)	—		—		—		—
Net periodic pension costs	$	20		$	1	$	10		$	3	$	2	$	—	$	—

	Year Ended December 31, 2012
(in millions)	Duke Energy		Duke Energy Carolinas		Progress Energy			Duke Energy Progress		Duke Energy Florida		Duke Energy Ohio		Duke Energy Indiana
Service cost	$	2	$	—	$	2		$	1	$	—	$	—	$	—
Interest cost on projected benefit obligation	12		1		8			1		2		—		—
Amortization of actuarial loss	4		—		5			1		—		—		—
Amortization of prior service cost (credit)	1		—		(1		)	—		—		—		—
Net periodic pension costs	$	19	$	1	$	14		$	3	$	2	$	—	$	—

Amounts Recognized in AOCI and Regulatory Assets and Liabilities

Amounts Recognized in Accumulated Other Comprehensive Income and Regulatory Assets and Liabilities

	Year Ended 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, net increase	$	44		$	1	$	14		$	4	$	19	$	1	$	2
Regulatory liabilities, net decrease	$	(7	)	$	—	$	—		$	—	$	—	$	—	$	—
Accumulated other comprehensive (income) loss
Deferred income tax benefit	$	4		$	—	$	5		$	—	$	—	$	—	$	—
Actuarial gains arising during the year	(9		)	—		(11		)	—		—		—		—
Net amount recognized in accumulated other comprehensive loss (income)	$	(5	)	$	—	$	(6	)	$	—	$	—	$	—	$	—

	Year Ended 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, net (decrease) increase	$	(14	)	$	1	$	(16	)	$	(4	)	$	(3	)	$	—	$	(2	)
Regulatory liabilities, net increase	$	5		$	—	$	—		$	—		$	—		$	—	$	—
Accumulated other comprehensive (income) loss
Deferred income tax benefit	$	—		$	—	$	1		$	—		$	—		$	—	$	—
Actuarial losses (gains) arising during the year	2			—		(5		)	—			—			—		—
Prior year service credit arising during the year	(1		)	—		—			—			—			—		—
Net amount recognized in accumulated other comprehensive loss (income)	$	1		$	—	$	(4	)	$	—		$	—		$	—	$	—

Reconciliation of Funded Status to Net Amount Recognized

Reconciliation of Funded Status to Net Amount Recognized

	Year Ended December 31, 2014
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress			Duke Energy Florida			Duke Energy Ohio		Duke Energy Indiana
Change in Projected Benefit Obligation
Obligation at prior measurement date	$	304		$	15		$	140		$	34		$	39		$	3	$	5
Service cost	3			—			1			1			—			—		—
Interest cost	14			1			5			1			2			—		—
Actuarial losses(a)	43			2			11			2			20			1		1
Settlements	—			—			—			—			—			—		—
Plan amendments	—			—			—			—			—			—		—
Transfers	—			—			(32		)	—			4			—		—
Benefits paid	(27		)	(2		)	(9		)	(3		)	(4		)	—		(1		)
Obligation at measurement date	$	337		$	16		$	116		$	35		$	61		$	4	$	5
Accumulated Benefit Obligation at measurement date	$	333		$	15		$	116		$	35		$	61		$	4	$	5
Change in Fair Value of Plan Assets
Plan assets at prior measurement date	—			—			—			—			—			—		—
Benefits paid	(27		)	(2		)	(9		)	(3		)	(4		)	—		(1		)
Employer contributions	27			2			9			3			4			—		1
Plan assets at measurement date	$	—		$	—		$	—		$	—		$	—		$	—	$	—

(a) Includes an increase in benefit obligation of $21 million as a result of changes in Duke Energy's mortality assumptions.

	Year Ended December 31, 2013
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress			Duke Energy Florida			Duke Energy Ohio			Duke Energy Indiana
Change in Projected Benefit Obligation
Obligation at prior measurement date	$	335		$	16		$	176		$	38		$	45		$	4		$	5
Service cost	3			—			1			1			—			—			—
Interest cost	13			1			7			1			1			—			—
Actuarial (gains) losses	(15		)	1			(11		)	(3		)	(3		)	(1		)	—
Settlements	(5		)	—			—			—			—			—			—
Plan amendments	(1		)	—			—			—			—			—			—
Transfers	—			—			(21		)	—			—			—			—
Benefits paid	(26		)	(3		)	(12		)	(3		)	(4		)	—			—
Obligation at measurement date	$	304		$	15		$	140		$	34		$	39		$	3		$	5
Accumulated Benefit Obligation at measurement date	$	302		$	15		$	140		$	34		$	39		$	3		$	5
Change in Fair Value of Plan Assets
Plan assets at prior measurement date	—			—			—			—			—			—			—
Benefits paid	(26		)	(3		)	(12		)	(3		)	(4		)	—			—
Employer contributions	26			3			12			3			4			—			—
Plan assets at measurement date	$	—		$	—		$	—		$	—		$	—		$	—		$	—

Amounts Recognized in the Consolidated Balance Sheet

Amounts Recognized in 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
Current pension liability(a)	$	27		$	2	$	8		$	3	$	4	$	—	$	—
Non-current pension liability(b)	310			14		108			32		57		4		5
Total accrued pension liability	$	337		$	16	$	116		$	35	$	61	$	4	$	5
Regulatory assets	$	89		$	5	$	32		$	7	$	25	$	1	$	2
Regulatory liabilities	$	—		$	—	$	—		$	—	$	—	$	—	$	—
Accumulated other comprehensive (income) loss
Deferred income tax asset	4			—		$	2		—		—		—		—
Prior service credit	(1		)	—		—			—		—		—		—
Net actuarial gain	(8		)	—		(4		)	—		—		—		—
Net amounts recognized in accumulated other comprehensive income	$	(5	)	$	—	$	(2	)	$	—	$	—	$	—	$	—
Amounts to be recognized in net periodic pension expense in the next year
Unrecognized net actuarial loss	$	6		—		$	2		$	1	2		—		—
Unrecognized prior service credit	(1		)	—		—			—		—		—		—

	December 31, 2013
(in millions)	Duke Energy			Duke Energy Carolinas		Progress Energy			Duke Energy Progress		Duke Energy Florida		Duke Energy Ohio		Duke Energy Indiana
Current pension liability(a)	$	30		$	2	$	11		$	2	$	3	$	—	$	—
Non-current pension liability(b)	274			13		129			32		36		3		5
Total accrued pension liability	$	304		$	15	$	140		$	34	$	39	$	3	$	5
Regulatory assets	$	45		$	4	$	18		$	3	$	6	$	—	$	—
Regulatory liabilities	$	7		$	—	$	—		$	—	$	—	$	—	$	—
Accumulated other comprehensive (income) loss
Deferred income tax asset	$	—		$	—	$	(3	)	$	—	$	—	$	—	$	—
Prior service credit	(1		)	—		—			—		—		—		—
Net actuarial loss	1			—		7			—		—		—		—
Net amounts recognized in accumulated other comprehensive loss	$	—		$	—	$	4		$	—	$	—	$	—	$	—

(a) Included in Other within Current Liabilities on the Consolidated Balance Sheets.

(b) Included in Accrued pension and other post-retirement benefit costs on the Consolidated Balance Sheets.

Information for Plans with Accumulated Benefit Obligation in Excess of Plan Assets

Information for Plans with Accumulated Benefit Obligation in Excess of Plan Assets

	December 31, 2014
(in millions)	Duke Energy		Duke Energy Carolinas		Progress Energy		Duke Energy Progress		Duke Energy Florida		Duke Energy Ohio		Duke Energy Indiana
Projected benefit obligation	$	337	$	16	$	116	$	35	$	61	$	4	$	5
Accumulated benefit obligation	333		15		116		35		61		4		5

	December 31, 2013
(in millions)	Duke Energy		Duke Energy Carolinas		Progress Energy		Duke Energy Progress		Duke Energy Florida		Duke Energy Ohio		Duke Energy Indiana
Projected benefit obligation	$	304	$	15	$	140	$	34	$	39	$	3	$	5
Accumulated benefit obligation	302		15		140		34		39		3		5

Assumptions Used for Pension Benefits Accounting

The following tables present the assumptions used for pension benefit accounting.

	December 31,
	2014		2013		2012(a)
Benefit Obligations
Discount rate	4.10	%	4.70	%				4.10%
Salary increase	4.40	%	4.40	%				4.30%
Net Periodic Benefit Cost
Discount rate	4.70	%	4.10	%	4.60	%	-	5.10%
Salary increase	4.40	%	4.30	%				4.40%

(a) For Progress Energy plans, the assumptions used in 2012 to determine net periodic pension costs reflect remeasurement as of July 1, 2012, due to the merger between Duke Energy and Progress Energy.

Expected Benefit Payments

Expected Benefit Payments

(in millions)	Duke Energy		Duke Energy Carolinas		Progress Energy		Duke Energy Progress		Duke Energy Florida		Duke Energy Ohio		Duke Energy Indiana
Years ending December 31,
2015	$	28	$	2	$	8	$	3	$	4	$	—	$	—
2016	27		2		8		3		4		—		—
2017	27		2		8		3		4		—		—
2018	24		2		8		3		4		—		—
2019	24		2		8		3		4		—		—
2020 - 2024	116		6		38		13		19		2		2

Other Post-Retirement Benefit Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Components of Net Periodic Pension Costs

Components of Net Periodic Other Post-Retirement Benefit Costs

	Year Ended December 31, 2014
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress			Duke Energy Florida			Duke Energy Ohio			Duke Energy Indiana
Service cost	$	10		$	2		$	4		$	1		$	3		$	—		$	1
Interest cost on accumulated post-retirement benefit obligation	49			12			22			11			12			2			5
Expected return on plan assets	(13		)	(9		)	—			—			—			—			(1		)
Amortization of actuarial loss (gain)	39			3			42			31			10			(2		)	—
Amortization of prior service credit	(125		)	(11		)	(95		)	(73		)	(21		)	—			—
Net periodic post-retirement benefit costs	$	(40	)	$	(3	)	$	(27	)	$	(30	)	$	4		$	—		$	5

	Year Ended December 31, 2013
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress			Duke Energy Florida			Duke Energy Ohio			Duke Energy Indiana
Service cost	$	24		$	2		$	18		$	9		$	7		$	1		$	1
Interest cost on accumulated post-retirement benefit obligation	68			13			41			22			16			2			5
Expected return on plan assets	(14		)	(11		)	—			—			—			(1		)	(1		)
Amortization of actuarial loss (gain)	52			3			57			34			16			(1		)	1
Amortization of prior service credit	(41		)	(7		)	(30		)	(20		)	(6		)	(1		)	—
Net periodic post-retirement benefit costs	$	89		$	—		$	86		$	45		$	33		$	—		$	6

	Year Ended December 31, 2012
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress		Duke Energy Florida			Duke Energy Ohio			Duke Energy Indiana
Service cost	$	16		$	2		$	17		$	8	$	7		$	1		$	1
Interest cost on accumulated post-retirement benefit obligation	56			15			43			23		18			3			6
Expected return on plan assets	(17		)	(10		)	(2		)	—		(2		)	(1		)	(1		)
Amortization of actuarial loss (gain)	14			3			35			20		12			(2		)	—
Amortization of prior service credit	(8		)	(5		)	—			—		—			(1		)	—
Amortization of net transition liability	10			7			4			—		3			—			—
Special termination benefit cost	9			1			5			2		1			—			—
Net periodic post-retirement benefit costs	$	80		$	13		$	102		$	53	$	39		$	—		$	6

Amounts Recognized in AOCI and Regulatory Assets and Liabilities

Amounts Recognized in Accumulated Other Comprehensive Income and Regulatory Assets and Liabilities

	Year Ended 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, net increase (decrease)	$	162		$	34	$	129		$	97	$	(4	)	$	—		$	(7	)
Regulatory liabilities, net increase (decrease)	$	249		$	76	$	122		$	61	$	61		$	(2	)	$	14
Accumulated other comprehensive (income) loss
Deferred income tax benefit	$	1		$	—	$	1		$	—	$	—		$	—		$	—
Actuarial losses (gains) arising during the year	1			—		(2		)	—		—			—			—
Prior year service credit arising during the year	(6		)	—		—			—		—			—			—
Amortization of prior year prior service credit	2			—		—			—		—			—			—
Net amount recognized in accumulated other comprehensive income	$	(2	)	$	—	$	(1	)	$	—	$	—		$	—		$	—

	Year Ended 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, net (decrease) increase	$	(683	)	$	(51	)	$	(634	)	$	(388	)	$	(166	)	$	—	$	(6	)
Regulatory liabilities, net increase (decrease)	$	30		$	—		$	—		$	—		$	—		$	3	$	9
Accumulated other comprehensive (income) loss
Deferred income tax benefit	$	2		$	—		$	—		$	—		$	—		$	—	$	—
Actuarial gains arising during the year	(4		)	—			—			—			—			—		—
Prior year service credit arising during the year	(3		)	—			—			—			—			—		—
Amortization of prior year actuarial loss	1			—			—			—			—			—		—
Net amount recognized in accumulated other comprehensive income	$	(4	)	$	—		$	—		$	—		$	—		$	—	$	—

Reconciliation of Funded Status to Net Amount Recognized

Reconciliation of Funded Status to Accrued Other Post-Retirement Benefit Costs

	Year Ended December 31, 2014
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress			Duke Energy Florida			Duke Energy Ohio			Duke Energy Indiana
Change in Projected Benefit Obligation
Accumulated post-retirement benefit obligation at prior measurement date	$	1,106		$	265		$	533		$	233		$	253		$	42		$	118
Service cost	10			2			4			1			3			—			1
Interest cost	49			12			22			11			12			2			5
Plan participants' contributions	25			10			8			4			4			—			2
Actuarial gains(a)	(87		)	(35		)	(19		)	(21		)	—			—			(20		)
Transfers	—			1			(48		)	(2		)	—			(1		)	—
Plan amendments	(85		)	(4		)	(77		)	—			(78		)	(1		)	—
Benefits paid	(103		)	(31		)	(44		)	(19		)	(24		)	(3		)	(10		)
Accrued retiree drug subsidy	1			—			—			—			—			—			—
Accumulated post-retirement benefit obligation at measurement date	$	916		$	220		$	379		$	207		$	170		$	39		$	96
Change in Fair Value of Plan Assets
Plan assets at prior measurement date	$	214		$	143		—			—			—			$	8		$	18
Actual return on plan assets	18			12			—			—			—			—			2
Benefits paid	(103		)	(31		)	(44		)	(19		)	(24		)	(3		)	(10		)
Transfers	—			(1		)	—			—			—			—			—
Employer contributions	73			12			36			14			20			3			11
Plan participants' contributions	25			10			8			4			4			—			2
Plan assets at measurement date	$	227		$	145		$	—		$	(1	)	$	—		$	8		$	23

(a) Includes an increase in benefit obligation of $7 million as a result of changes in Duke Energy's mortality assumptions.

	Year Ended December 31, 2013
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress			Duke Energy Florida			Duke Energy Ohio			Duke Energy Indiana
Change in Projected Benefit Obligation
Accumulated post-retirement benefit obligation at prior measurement date	$	1,794		$	316		$	1,128		$	612		$	413		$	48		$	136
Service cost	24			2			18			9			7			1			1
Interest cost	68			13			41			22			16			2			5
Plan participants' contributions	47			15			14			6			7			3			3
Actuarial gains	(227		)	(32		)	(156		)	(73		)	(70		)	(6		)	(12		)
Transfers	—			—			(1		)	(8		)	—			—			—
Plan amendments	(476		)	(16		)	(455		)	(311		)	(91		)	—			(3		)
Benefits paid	(132		)	(36		)	(60		)	(26		)	(31		)	(6		)	(14		)
Accrued retiree drug subsidy	8			3			4			2			2			—			2
Accumulated post-retirement benefit obligation at measurement date	$	1,106		$	265		$	533		$	233		$	253		$	42		$	118
Change in Fair Value of Plan Assets
Plan assets at prior measurement date	$	198		$	134		$	—		$	—		$	—		$	7		$	17
Actual return on plan assets	18			13			—			—			—			2			2
Benefits paid	(132		)	(36		)	(60		)	(26		)	(31		)	(6		)	(14		)
Transfers	—			(1		)	—			—			—			—			—
Employer contributions	83			18			46			20			24			2			10
Plan participants' contributions	47			15			14			6			7			3			3
Plan assets at measurement date	$	214		$	143		$	—		$	—		$	—		$	8		$	18

Amounts Recognized in the Consolidated Balance Sheet

Amounts Recognized in 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
Current post-retirement liability(a)	$	35		$	—		$	29		$	16		$	14		$	2		$	—
Non-current post-retirement liability(b)	654			75			350			192			156			29			73
Total accrued post-retirement liability	$	689		$	75		$	379		$	208		$	170		$	31		$	73
Regulatory assets	$	—		$	—		$	—		$	—		$	—		$	—		$	64
Regulatory liabilities	$	380		$	76		$	122		$	61		$	61		$	19		$	91
Accumulated other comprehensive (income) loss
Deferred income tax liability	$	5		$	—		$	1		$	—		$	—		$	—		$	—
Prior service credit	(9		)	—			—			—			—			—			—
Net actuarial gain	(5		)	—			(2		)	—			—			—			—
Net amounts recognized in accumulated other comprehensive income	$	(9	)	$	—		$	(1	)	$	—		$	—		$	—		$	—
Amounts to be recognized in net periodic pension expense in the next year
Unrecognized net actuarial loss (gain)	$	16		$	(1	)	$	28		$	18		$	10		$	(2	)	$	—
Unrecognized prior service credit	(140		)	(14		)	(103		)	(68		)	(35		)	—			—

	December 31, 2013
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress			Duke Energy Florida		Duke Energy Ohio		Duke Energy Indiana
Current post-retirement liability(a)	$	39		$	—		$	36		$	17		$	16	$	2	$	—
Non-current post-retirement liability(b)	853			122			497			216			237		32		100
Total accrued post-retirement liability	$	892		$	122		$	533		$	233		$	253	$	34	$	100
Regulatory assets	$	(162	)	$	(34	)	$	(129	)	$	(97	)	$	4	$	—	$	71
Regulatory liabilities	$	131		$	—		$	—		$	—		$	—	$	21	$	77
Accumulated other comprehensive (income) loss
Deferred income tax liability	$	4		$	—		$	—		$	—		$	—	$	—	$	—
Prior service credit	(5		)	—			—			—			—		—		—
Net actuarial gain	(6		)	—			—			—			—		—		—
Net amounts recognized in accumulated other comprehensive income	$	(7	)	$	—		$	—		$	—		$	—	$	—	$	—

(a) Included in Other within Current Liabilities on the Consolidated Balance Sheets. 

(b) Included in Accrued pension and other post-retirement benefit costs on the Consolidated Balance Sheets.

Assumptions Used for Pension Benefits Accounting

The following tables present the assumptions used for other post-retirement benefits accounting.

	December 31,
	2014		2013		2012(a)
Benefit Obligations
Discount rate	4.10	%	4.70	%				4.10	%
Net Periodic Benefit Cost
Discount rate	4.70	%	4.10	%	4.60	%	-	5.10	%
Expected long-term rate of return on plan assets	6.75	%	7.75	%	5.00	%	-	8.00	%
Assumed tax rate	35	%	35	%				35	%

(a) For Progress Energy plans, the assumptions used in 2012 to determine net periodic post-retirement benefit costs reflect remeasurement as of July 1, 2012, due to the merger between Duke Energy and Progress Energy.

Assumed Health Care Cost Trend Rate

Assumed Health Care Cost Trend Rate

	December 31,
	2014		2013
Health care cost trend rate assumed for next year	6.75	%	8.50	%
Rate to which the cost trend is assumed to decline (the ultimate trend rate)	4.75	%	5.00	%
Year that rate reaches ultimate trend	2023		2021

Sensitivity to Changes in Assumed Health Care Cost Trend Rates

Sensitivity to Changes in Assumed Health Care Cost Trend Rates

	Year Ended December 31, 2014
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress			Duke Energy Florida			Duke Energy Ohio			Duke Energy Indiana
1-Percentage Point Increase
Effect on total service and interest costs	$	2		$	1		$	1		$	—		$	1		$	—		$	—
Effect on post-retirement benefit obligation	36			9			15			8			7			2			4
1-Percentage Point Decrease
Effect on total service and interest costs	(2		)	(1		)	(1		)	—			(1		)	—			—
Effect on post-retirement benefit obligation	(31		)	(8		)	(13		)	(7		)	(6		)	(1		)	(3		)

Expected Benefit Payments

Expected Benefit Payments

(in millions)	Duke Energy		Duke Energy Carolinas		Progress Energy		Duke Energy Progress		Duke Energy Florida		Duke Energy Ohio		Duke Energy Indiana
Years ending December 31,
2015	$	77	$	17	$	30	$	16	$	14	$	4	$	10
2016	77		18		30		16		14		4		10
2017	76		18		29		15		14		3		9
2018	74		19		29		15		14		3		9
2019	73		19		29		15		13		3		8
2020 - 2024	332		84		132		70		61		15		35