Employee Benefit Plans (Tables)

3 Months Ended

6 Months Ended

Jun. 30, 2012

Jun. 30, 2012

Components Of Net Periodic Pension Costs

	Three Months Ended				Six Months Ended
	June 30,				June 30,
(in millions)		2012		2011		2012		2011
Duke Energy Carolinas	$	9	$	8	$	20	$	20
Duke Energy Ohio		1		1		2		2
Duke Energy Indiana		1		2		3		5

Duke Energy Carolinas [Member]

Components Of Net Periodic Pension Costs

Duke Energy Carolinas
	Three Months Ended						Three Months Ended
	June 30, 2012						June 30, 2011
(in millions)		Qualified Pension Plans		Non-Qualified Pension Plans		Other Post-Retirement Benefit Plans		Qualified Pension Plans		Non-Qualified Pension Plans		Other Post-Retirement Benefit Plans
Service cost	$	8	$	―	$	―	$	10	$	―	$	1
Interest cost on projected benefit obligation		22		1		4		22		1		4
Expected return on plan assets		(37)		―		(2)		(38)		―		(3)
Amortization of prior service cost (credit)		1		―		(1)		―		―		(2)
Amortization of net transition liability		―		―		2		―		―		3
Amortization of loss		12		―		―		9		―		―
Other		1		―		―		2		―		―
Net periodic costs	$	7	$	1	$	3	$	5	$	1	$	3

	Six Months Ended						Six Months Ended
	June 30, 2012						June 30, 2011
(in millions)		Qualified Pension Plans		Non-Qualified Pension Plans		Other Post-Retirement Benefit Plans		Qualified Pension Plans		Non-Qualified Pension Plans		Other Post-Retirement Benefit Plans
Service cost	$	17	$	―	$	1	$	19	$	―	$	1
Interest cost on projected benefit obligation		45		1		8		43		1		8
Expected return on plan assets		(73)		―		(5)		(75)		―		(5)
Amortization of prior service cost (credit)		1		―		(2)		―		―		(3)
Amortization of net transition liability		―		―		3		―		―		5
Amortization of loss		23		―		1		18		―		1
Other		1		―		―		4		―		―
Net periodic costs	$	14	$	1	$	6	$	9	$	1	$	7

Duke Energy Ohio [Member]

Components Of Net Periodic Pension Costs

Duke Energy Ohio
		Three Months Ended				Three Months Ended
		June 30, 2012				June 30, 2011
(in millions)			Qualified Pension Plans(a)		Qualified Pension Plans(a)
Service cost		$	1	$	1
Interest cost on projected benefit obligation			8		8
Expected return on plan assets			(11)		(11)
Amortization of loss			3		2
Other			―		1
Net periodic costs(b)		$	1	$	1
(a)	Excludes regulatory asset amortization of $1 million for each of the three months ended June 30, 2012 and 2011, resulting from purchase accounting adjustments associated with Duke Energy’s merger with Cinergy in April 2006.
(b)	Components of net periodic costs for Duke Energy Ohio's other post-retirement benefit plans and non-qualified pension plans were an insignificant amount for each of the three months ended June 30, 2012 and 2011.

		Six Months Ended				Six Months Ended
		June 30, 2012				June 30, 2011
(in millions)			Qualified Pension Plans(a)		Other Post-Retirement Benefit Plans(b)		Qualified Pension Plans(a)		Other Post-Retirement Benefit Plans(b)
Service cost		$	3	$	―	$	3	$	―
Interest cost on projected benefit obligation			16		1		16		1
Expected return on plan assets			(22)		―		(22)		―
Amortization of loss (gain)			5		(1)		4		(1)
Other			―		―		1		―
Net periodic costs(c)		$	2	$	―	$	2	$	―
(a)	Excludes regulatory asset amortization of $3 million for each of the six months ended June 30, 2012 and 2011, resulting from purchase accounting adjustments associated with Duke Energy’s merger with Cinergy in April 2006.
(b)	Excludes regulatory asset amortization of $1 million for each of the six months ended June 30, 2012 and 2011, resulting from purchase accounting adjustments associated with Duke Energy’s merger with Cinergy in April 2006.
(c)	Components of net periodic costs for Duke Energy Ohio's non-qualified pension plans were an insignificant amount for each of the six months ended June 30, 2012 and 2011.

Duke Energy Indiana [Member]

Components Of Net Periodic Pension Costs

Duke Energy Indiana
		Three Months Ended				Three Months Ended
		June 30, 2012				June 30, 2011
(in millions)			Qualified Pension Plans		Other Post-Retirement Benefit Plans		Qualified Pension Plans		Other Post-Retirement Benefit Plans
Service cost		$	3	$	―	$	2	$	―
Interest cost on projected benefit obligation			7		2		8		2
Expected return on plan assets			(11)		(1)		(11)		(1)
Amortization of prior service cost			―		1		1		―
Amortization of loss (gain)			4		(1)		3		1
Other			―		―		1		―
Net periodic costs(a)		$	3	$	1	$	4	$	2
(a)	Components of net periodic costs for Duke Energy Indiana's non-qualified pension plans were an insignificant amount for each of the three months ended June 30, 2012 and 2011.

		Six Months Ended				Six Months Ended
		June 30, 2012				June 30, 2011
(in millions)			Qualified Pension Plans		Other Post-Retirement Benefit Plans		Qualified Pension Plans		Other Post-Retirement Benefit Plans
Service cost		$	5	$	―	$	5	$	―
Interest cost on projected benefit obligation			15		4		15		4
Expected return on plan assets			(23)		(1)		(22)		(1)
Amortization of prior service cost			1		1		1		―
Amortization of loss (gain)			7		(1)		7		1
Other			―		―		1		―
Net periodic costs(a)		$	5	$	3	$	7	$	4
(a)	Components of net periodic costs for Duke Energy Indiana's non-qualified pension plans were an insignificant amount for each of the six months ended June 30, 2012 and 2011.

Duke Energy Corp [Member]

Components Of Net Periodic Pension Costs

		Three Months Ended						Three Months Ended
		June 30, 2012						June 30, 2011
(in millions)		Qualified Pension Plans(a)		Non-Qualified Pension Plans		Other Post-Retirement Benefit Plans(b)		Qualified Pension Plans(a)		Non-Qualified Pension Plans		Other Post-Retirement Benefit Plans(b)
Service cost		$	22	$	―	$	1	$	24	$	1	$	3
Interest cost on projected benefit obligation			59		1		9		58		2		9
Expected return on plan assets			(94)		―		(4)		(96)		―		(4)
Amortization of prior service cost (credit)			2		1		(2)		1		―		(2)
Amortization of net transition liability			―		―		2		―		―		2
Amortization of loss (gain)			25		1		(1)		19		―		(1)
Other			1		―		―		5		―		―
Net periodic costs		$	15	$	3	$	5	$	11	$	3	$	7
(a)	Excludes regulatory asset amortization of $4 million and $3 million for each of the three months ended June 30, 2012 and 2011, respectively, resulting from purchase accounting adjustments associated with Duke Energy’s merger with Cinergy in April 2006.
(b)	Excludes regulatory asset amortization of $2 million for each of the three months ended June 30, 2012 and 2011, resulting from purchase accounting adjustments associated with Duke Energy’s merger with Cinergy in April 2006.

		Six Months Ended						Six Months Ended
		June 30, 2012						June 30, 2011
(in millions)		Qualified Pension Plans(a)		Non-Qualified Pension Plans		Other Post-Retirements Benefit Plans(b)		Qualified Pension Plans(a)		Non-Qualified Pension Plans		Other Post-Retirements Benefit Plans(b)
Service cost		$	45	$	1	$	3	$	48	$	1	$	4
Interest cost on projected benefit obligation			120		3		17		116		4		18
Expected return on plan assets			(188)		―		(8)		(192)		―		(8)
Amortization of prior service cost (credit)			3		1		(4)		3		1		(4)
Amortization of net transition liability			―		―		4		―		―		5
Amortization of loss (gain)			49		1		(3)		38		―		(2)
Other			2		―		―		9		―		―
Net periodic costs		$	31	$	6	$	9	$	22	$	6	$	13
(a)	Excludes regulatory asset amortization of $7 million for each of the six months ended June 30, 2012 and 2011, resulting from purchase accounting adjustments associated with Duke Energy’s merger with Cinergy in April 2006.
(b)	Excludes regulatory asset amortization of $4 million for each of the six months ended June 30, 2012 and 2011, resulting from purchase accounting adjustments associated with Duke Energy’s merger with Cinergy in April 2006.