Pension and Other Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2013

Compensation And Retirement Disclosure [Abstract]

Components of Net Periodic Benefit Cost

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

	Pension Benefits						Other Postretirement Benefits
	2013			2012			2013			2012
	(millions of dollars)
Service cost	$	13		$	7		$	2		$	3
Interest cost		25			27			8			8
Expected return on plan assets		(36	)		(32	)		(5	)		(4	)
Amortization of prior service cost (benefit)		1			1			(1	)		(1	)
Amortization of net actuarial loss		18			18			4			2
Termination benefits		—			—			—			1
Net periodic benefit cost	$	21		$	21		$	8		$	9

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

	Pension Benefits						Other Postretirement Benefits
	2013			2012			2013			2012
	(millions of dollars)
Service cost	$	26		$	18		$	4		$	4
Interest cost		50			53			16			17
Expected return on plan assets		(73	)		(66	)		(10	)		(9	)
Amortization of prior service cost (benefit)		1			1			(2	)		(2	)
Amortization of net actuarial loss		34			32			8			7
Termination benefits		—			—			—			1
Net periodic benefit cost	$	38		$	38		$	16		$	18