Pension and Other Postretirement Benefits (Tables)

3 Months Ended

Mar. 31, 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 March 31, 2014 and 2013:

	Pension Benefits						Other Postretirement Benefits
	2014			2013			2014			2013
	(millions of dollars)
Service cost	$	12		$	13		$	2		$	2
Interest cost		27			25			7			8
Expected return on plan assets		(35	)		(37	)		(6	)		(5	)
Amortization of prior service cost (benefit)		—			—			(3	)		(1	)
Amortization of net actuarial loss		11			16			3			4
Net periodic benefit cost	$	15		$	17		$	3		$	8