Employee Benefit Plans (Tables)

6 Months Ended

Jun. 30, 2014

Defined Benefit Plan Disclosure [Line Items]

Employee Savings Plan Matching Contributions

The following table includes pretax employer matching contributions, as well as the additional contribution of 4 percent of eligible pay per pay period for employees not eligible to participate in a defined benefit plan, 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
Three Months Ended June 30,
2014	$	36	$	12	$	11	$	7	$	3	$	1	$	2
2013	30		10		10		6		3		1		1
Six Months Ended June 30,
2014	$	80	$	26	$	23	$	16	$	7	$	2	$	4
2013	71		24		22		12		7		2		3

Qualified Pension Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Components of Net Periodic Pension Costs

The following tables include the components of net periodic pension costs for qualified pension plans.

	Three Months Ended June 30, 2014
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress			Duke Energy Florida			Duke Energy Ohio			Duke Energy Indiana
Service cost	$	34		$	11		$	10		$	5		$	5		$	1		$	2
Interest cost on projected benefit obligation	86			21			28			14			15			5			8
Expected return on plan assets	(127		)	(33		)	(43		)	(22		)	(22		)	(6		)	(11		)
Amortization of actuarial loss	37			9			17			8			8			1			3
Amortization of prior service credit	(3		)	(2		)	(1		)	(1		)	(1		)	—			—
Other	1			—			—			1			1			—			—
Net periodic pension costs	$	28		$	6		$	11		$	5		$	6		$	1		$	2

	Three Months Ended June 30, 2013
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress			Duke Energy Florida			Duke Energy Ohio			Duke Energy Indiana
Service cost	$	42		$	13		$	15		$	6		$	7		$	1		$	3
Interest cost on projected benefit obligation	80			20			29			12			14			6			7
Expected return on plan assets	(137		)	(37		)	(49		)	(24		)	(22		)	(7		)	(11		)
Amortization of actuarial loss	61			15			25			12			13			3			5
Amortization of prior service credit	(3		)	(1		)	(1		)	—			(1		)	—			—
Other	1			—			—			—			—			—			—
Net periodic pension costs	$	44		$	10		$	19		$	6		$	11		$	3		$	4

	Six Months Ended June 30, 2014
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress			Duke Energy Florida			Duke Energy Ohio			Duke Energy Indiana
Service cost	$	68		$	21		$	20		$	10		$	10		$	2		$	4
Interest cost on projected benefit obligation	172			42			56			27			29			10			15
Expected return on plan assets	(255		)	(66		)	(86		)	(43		)	(43		)	(13		)	(20		)
Amortization of actuarial loss	74			18			34			16			16			2			6
Amortization of prior service credit	(7		)	(4		)	(2		)	(1		)	(1		)	—			—
Other	3			1			1			1			1			—			—
Net periodic pension costs	$	55		$	12		$	23		$	10		$	12		$	1		$	5

	Six Months Ended June 30, 2013
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress			Duke Energy Florida			Duke Energy Ohio			Duke Energy Indiana
Service cost	$	84		$	25		$	30		$	11		$	15		$	3		$	6
Interest cost on projected benefit obligation	160			40			58			25			27			11			14
Expected return on plan assets	(274		)	(74		)	(99		)	(47		)	(44		)	(15		)	(22		)
Amortization of actuarial loss	122			30			50			23			25			6			11
Amortization of prior service credit	(6		)	(3		)	(2		)	—			(1		)	—			—
Other	3			1			1			—			—			—			—
Net periodic pension costs	$	89		$	19		$	38		$	12		$	22		$	5		$	9

Non-Qualified Pension Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Components of Net Periodic Pension Costs

The following tables include the components of net periodic pension costs for non-qualified pension plans for registrants with non-qualified pension costs.

	Three Months Ended June 30, 2014
(in millions)	Duke Energy		Duke Energy Carolinas		Progress Energy		Duke Energy Progress		Duke Energy Florida
Service cost	$	1	$	—	$	1	$	—	$	—
Interest cost on projected benefit obligation	3		—		—		—		1
Amortization of actuarial loss	1		—		1		—		—
Net periodic pension costs	$	5	$	—	$	2	$	—	$	1

	Three Months Ended June 30, 2013
(in millions)	Duke Energy		Duke Energy Carolinas		Progress Energy		Duke Energy Progress		Duke Energy Florida
Service cost	$	1	$	—	$	—	$	—	$	—
Interest cost on projected benefit obligation	3		1		2		1		1
Amortization of actuarial loss	1		—		1		—		—
Net periodic pension costs	$	5	$	1	$	3	$	1	$	1

	Six Months Ended June 30, 2014
(in millions)	Duke Energy		Duke Energy Carolinas		Progress Energy		Duke Energy Progress		Duke Energy Florida
Service cost	$	1	$	—	$	1	$	—	$	—
Interest cost on projected benefit obligation	7		—		2		1		1
Amortization of actuarial loss	1		—		1		—		—
Amortization of prior service credit	—		—		—		—		—
Net periodic pension costs	$	9	$	—	$	4	$	1	$	1

	Six Months Ended June 30, 2013
(in millions)	Duke Energy			Duke Energy Carolinas		Progress Energy			Duke Energy Progress		Duke Energy Florida
Service cost	$	1		$	—	$	—		$	—	$	—
Interest cost on projected benefit obligation	7			1		4			1		1
Amortization of actuarial loss	3			—		2			—		—
Amortization of prior service credit	(1		)	—		(1		)	—		—
Net periodic pension costs	$	10		$	1	$	5		$	1	$	1

Other Post-Retirement Benefit Plans [Member]

Defined Benefit Plan Disclosure [Line Items]

Components of Net Periodic Pension Costs

The following tables include the components of net periodic other post-retirement benefit costs.

	Three Months Ended June 30, 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		$	1		$	1		$	—		$	—
Interest cost on accumulated post-retirement benefit obligation	13			3			5			2			3			1			2
Expected return on plan assets	(3		)	(2		)	—			—			—			—			(1		)
Amortization of actuarial loss (gain)	10			—			11			8			3			(1		)	—
Amortization of prior service credit	(32		)	(2		)	(23		)	(18		)	(6		)	—			—
Net periodic other post-retirement benefit costs	$	(9	)	$	—		$	(6	)	$	(7	)	$	1		$	—		$	1

	Three Months Ended June 30, 2013
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress			Duke Energy Florida		Duke Energy Ohio			Duke Energy Indiana
Service cost	$	7		$	—		$	5		$	3		$	2	$	—		$	—
Interest cost on accumulated post-retirement benefit obligation	18			3			12			6			4		1			2
Expected return on plan assets	(4		)	(2		)	—			—			—		—			—
Amortization of actuarial loss (gain)	13			1			15			9			4		(1		)	—
Amortization of prior service credit	(3		)	(2		)	(1		)	(1		)	—		—			—
Net periodic other post-retirement benefit costs	$	31		$	—		$	31		$	17		$	10	$	—		$	2

	Six Months Ended June 30, 2014
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress			Duke Energy Florida			Duke Energy Ohio			Duke Energy Indiana
Service cost	$	5		$	1		$	2		$	1		$	2		$	—		$	—
Interest cost on accumulated post-retirement benefit obligation	25			6			11			5			6			1			3
Expected return on plan assets	(6		)	(4		)	—			—			—			—			(1		)
Amortization of actuarial loss (gain)	20			1			21			15			5			(1		)	—
Amortization of prior service credit	(63		)	(5		)	(47		)	(36		)	(11		)	—			—
Net periodic other post-retirement benefit costs	$	(19	)	$	(1	)	$	(13	)	$	(15	)	$	2		$	—		$	2

	Six Months Ended June 30, 2013
(in millions)	Duke Energy			Duke Energy Carolinas			Progress Energy			Duke Energy Progress			Duke Energy Florida		Duke Energy Ohio			Duke Energy Indiana
Service cost	$	14		$	1		$	11		$	6		$	4	$	—		$	—
Interest cost on accumulated post-retirement benefit obligation	36			6			23			12			8		1			3
Expected return on plan assets	(7		)	(5		)	—			—			—		—			—
Amortization of actuarial loss (gain)	26			2			29			18			8		(1		)	—
Amortization of prior service credit	(6		)	(4		)	(1		)	(1		)	—		—			—
Net periodic other post-retirement benefit costs	$	63		$	—		$	62		$	35		$	20	$	—		$	3