Employee Benefit Plans (Tables)

3 Months Ended

9 Months Ended

Sep. 30, 2012

Sep. 30, 2012

Components Of Net Periodic Pension Costs

		Three Months Ended						Three Months Ended
		September 30, 2012						September 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		$	39	$	―	$	7	$	24	$	―	$	1
Interest cost on projected benefit obligation			94		5		19		58		2		8
Expected return on plan assets			(142)		―		(4)		(96)		―		(3)
Amortization of prior service cost (credit)			3		―		(2)		1		―		(2)
Amortization of net transition liability			―		―		3		―		―		2
Amortization of loss			47		1		8		20		1		―
Special termination charge			―		―		9		―		―		―
Other			2		―		―		4		―		―
Net periodic costs		$	43	$	6	$	40	$	11	$	3	$	6
(a)	Excludes regulatory asset amortization of $3 million and $4 million for each of the three months ended September 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 $3 million and $2 million for the three months ended September 30, 2012 and 2011, resulting from purchase accounting adjustments associated with Duke Energy’s merger with Cinergy in April 2006.

		Nine Months Ended						Nine Months Ended
		September 30, 2012						September 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		$	84	$	1	$	10	$	72	$	1	$	5
Interest cost on projected benefit obligation			214		8		36		174		6		26
Expected return on plan assets			(330)		―		(12)		(288)		―		(11)
Amortization of prior service cost (credit)			6		1		(6)		4		1		(6)
Amortization of net transition liability			―		―		7		―		―		7
Amortization of loss (gain)			96		2		5		58		1		(2)
Special termination charge			―		―		9		―		―		―
Other			4		―		―		13		―		―
Net periodic costs		$	74	$	12	$	49	$	33	$	9	$	19
(a)	Excludes regulatory asset amortization of $10 million and $11 million for the nine months ended September 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 $7 million and $6 million for the nine months ended September 30, 2012 and 2011, resulting from purchase accounting adjustments associated with Duke Energy’s merger with Cinergy in April 2006.

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
(in millions)		2012		2011		2012		2011
Duke Energy Carolinas	$	8	$	8	$	28	$	28
Duke Energy Ohio		1		1		3		3
Duke Energy Indiana		2		1		5		6

Duke Energy Carolinas [Member]

Components Of Net Periodic Pension Costs

Duke Energy Carolinas
		Three Months Ended						Three Months Ended
		September 30, 2012						September 30, 2011
(in millions)			Qualified Pension Plans		Other Post-Retirement Benefit Plans		Qualified Pension Plans		Other Post-Retirement Benefit Plans
Service cost		$	9	$	1	$	9	$	―
Interest cost on projected benefit obligation			23		4		21		4
Expected return on plan assets			(36)		(3)		(37)		(2)
Amortization of prior service (credit) cost			―		(2)		1		(1)
Amortization of net transition liability			―		2		―		2
Amortization of loss			11		1		9		1
Special termination charge			―		1		―		―
Other			―		―		1		―
Net periodic costs(a)		$	7	$	4	$	4	$	4
(a)	Components of net periodic costs for Duke Energy Carolinas' non-qualified pension plans were an insignificant amount for the three months ended September 30, 2012 and 2011.

	Nine Months Ended						Nine Months Ended
	September 30, 2012						September 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	$	26	$	―	$	2	$	28	$	―	$	1
Interest cost on projected benefit obligation		68		1		12		64		1		12
Expected return on plan assets		(109)		―		(8)		(112)		―		(7)
Amortization of prior service cost (credit)		1		―		(4)		1		―		(4)
Amortization of net transition liability		―		―		5		―		―		7
Amortization of loss		34		―		2		27		―		2
Special termination charge		―		―		1		―		―		―
Other		1		―		―		5		―		―
Net periodic costs	$	21	$	1	$	10	$	13	$	1	$	11

Duke Energy Ohio [Member]

Components Of Net Periodic Pension Costs

Duke Energy Ohio
		Three Months Ended				Three Months Ended
		September 30, 2012				September 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		$	2	$	1	$	2	$	1
Interest cost on projected benefit obligation			7		1		8		1
Expected return on plan assets			(11)		(1)		(11)		―
Amortization of prior service credit			―		―		―		(1)
Amortization of loss (gain)			2		(1)		2		(1)
Other			―		―		1		―
Net periodic costs(c)		$	―	$	―	$	2	$	―
(a)	Excludes regulatory asset amortization of $2 million for each of the three months ended September 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 an insignificant amount and $1 million for each of the three months ended September 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 other post-retirement benefit plans and non-qualified pension plans were an insignificant amount for each of the three months ended September 30, 2012 and 2011.

		Nine Months Ended				Nine Months Ended
		September 30, 2012				September 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		$	5	$	1	$	5	$	1
Interest cost on projected benefit obligation			23		2		24		2
Expected return on plan assets			(33)		(1)		(33)		―
Amortization of prior service credit			―		―		―		(1)
Amortization of loss (gain)			7		(2)		6		(2)
Other			―		―		2		―
Net periodic costs(c)		$	2	$	―	$	4	$	―
(a)	Excludes regulatory asset amortization of $5 million for each of the nine months ended September 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 and $2 million for the nine months ended September 30, 2012 and 2011, respectively, 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 nine months ended September 30, 2012 and 2011.

Duke Energy Indiana [Member]

Components Of Net Periodic Pension Costs

Duke Energy Indiana
		Three Months Ended				Three Months Ended
		September 30, 2012				September 30, 2011
(in millions)			Qualified Pension Plans		Other Post-Retirement Benefit Plans		Qualified Pension Plans		Other Post-Retirement Benefit Plans
Service cost		$	2	$	1	$	3	$	1
Interest cost on projected benefit obligation			8		1		8		1
Expected return on plan assets			(12)		―		(12)		―
Amortization of prior service cost			1		―		―		―
Amortization of loss			3		―		3		―
Other			―		―		1		―
Net periodic costs(a)		$	2	$	2	$	3	$	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 September 30, 2012 and 2011.

		Nine Months Ended				Nine Months Ended
		September 30, 2012				September 30, 2011
(in millions)			Qualified Pension Plans		Other Post-Retirement Benefit Plans		Qualified Pension Plans		Other Post-Retirement Benefit Plans
Service cost		$	7	$	1	$	8	$	1
Interest cost on projected benefit obligation			23		5		23		5
Expected return on plan assets			(35)		(1)		(34)		(1)
Amortization of prior service cost			2		1		1		―
Amortization of loss (gain)			10		(1)		10		1
Other			―		―		2		―
Net periodic costs(a)		$	7	$	5	$	10	$	6
(a)	Components of net periodic costs for Duke Energy Indiana's non-qualified pension plans were an insignificant amount for each of the nine months ended September 30, 2012 and 2011.