Pension and Other Postretirement Benefits (Tables)

9 Months Ended

Sep. 30, 2014

Compensation and Retirement Disclosure [Abstract]

Components of Net Periodic Benefit Costs (Benefits)

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

	Pension Benefits						Other Postretirement Benefits
	2014			2013			2014			2013
	(millions of dollars)
Service cost	$	12		$	14		$	1		$	2
Interest cost		27			25			7			6
Expected return on plan assets		(36	)		(36	)		(6	)		(5	)
Amortization of prior service cost (benefit)		1			—			(2	)		(4	)
Amortization of net actuarial loss		12			16			—			2
Net periodic benefit cost (benefit)	$	16		$	19		$	—		$	1

The table below provides the components of net periodic benefit costs (benefits) recognized by Pepco Holdings for the nine months ended September 30, 2014 and 2013:

	Pension Benefits						Other Postretirement Benefits
	2014			2013			2014			2013
	(millions of dollars)
Service cost	$	33		$	40		$	5		$	6
Interest cost		82			75			20			22
Expected return on plan assets		(107	)		(109	)		(18	)		(15	)
Amortization of prior service cost (benefit)		2			1			(9	)		(6	)
Amortization of net actuarial loss		34			50			2			10
Net periodic benefit cost (benefit)	$	44		$	57		$	—		$	17