Pension and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2013

Compensation And Retirement Disclosure [Abstract]

Components of Net Periodic Benefit Cost

The following Pepco Holdings information is for the three months ended September 30, 2013 and 2012:

	Pension Benefits						Other Postretirement Benefits
	2013			2012			2013			2012
	(millions of dollars)
Service cost	$	14		$	8		$	2		$	2
Interest cost		25			27			6			9
Expected return on plan assets		(36	)		(33	)		(5	)		(5	)
Amortization of prior service cost (benefit)		—			1			(4	)		(1	)
Amortization of net actuarial loss		16			16			2			4
Net periodic benefit cost	$	19		$	19		$	1		$	9

The following Pepco Holdings information is for the nine months ended September 30, 2013 and 2012:

	Pension Benefits						Other Postretirement Benefits
	2013			2012			2013			2012
	(millions of dollars)
Service cost	$	40		$	26		$	6		$	6
Interest cost		75			80			22			26
Expected return on plan assets		(109	)		(99	)		(15	)		(14	)
Amortization of prior service cost (benefit)		1			2			(6	)		(3	)
Amortization of net actuarial loss		50			48			10			11
Termination benefits		—			—			—			1
Net periodic benefit cost	$	57		$	57		$	17		$	27