Pension and Other Postretirement Benefits (Tables)

6 Months Ended

Jun. 30, 2014

Compensation And Retirement Disclosure [Abstract]

Components of Net Periodic Benefit Cost

The table below provides the components of net periodic benefit costs recognized by Pepco Holdings for the three months ended June 30, 2014 and 2013:

	Pension Benefits						Other Postretirement Benefits
	2014			2013			2014			2013
	(millions of dollars)
Service cost	$	9		$	13		$	2		$	2
Interest cost		28			25			6			8
Expected return on plan assets		(36	)		(36	)		(6	)		(5	)
Amortization of prior service cost (benefit)		1			1			(4	)		(1	)
Amortization of net actuarial loss		11			18			(1	)		4
Net periodic benefit cost	$	13		$	21		$	(3	)	$	8

The table below provides the components of net periodic benefit costs recognized by Pepco Holdings for the six months ended June 30, 2014 and 2013:

	Pension Benefits						Other Postretirement Benefits
	2014			2013			2014			2013
	(millions of dollars)
Service cost	$	21		$	26		$	4		$	4
Interest cost		55			50			13			16
Expected return on plan assets		(71	)		(73	)		(12	)		(10	)
Amortization of prior service cost (benefit)		1			1			(7	)		(2	)
Amortization of net actuarial loss		22			34			2			8
Net periodic benefit cost	$	28		$	38		$	—		$	16