Accumulated Other Comprehensive Loss (Tables)

9 Months Ended

Sep. 30, 2013

Equity [Abstract]

Schedule of Components of Other Comprehensive Loss

The components of Pepco Holdings’ AOCL relating to continuing operations are as follows. For additional information, see the consolidated statements of comprehensive income.

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
	(millions of dollars)
Balance, beginning of period	$	(41	)	$	(36	)	$	(42	)	$	(34	)
Treasury Lock
Balance, beginning of period		(9	)		(10	)		(10	)		(10	)
Amount of net pre-tax loss reclassified to income:
Interest expense		—			1			1			1
Total net pre-tax loss reclassified to income		—			1			1			1
Income Tax expense		—			1			—			1
Net change during period		—			—			1			—
Balance, end of period		(9	)		(10	)		(9	)		(10	)
Pension and Other Postretirement Benefit Plans
Balance, beginning of period		(32	)		(26	)		(32	)		(24	)
Amount of net pre-tax loss reclassified to (from) income:
Other Operation and Maintenance expense		1			1			2			(4	)
Total net pre-tax loss reclassified to (from) income		1			1			2			(4	)
Income Tax expense (benefit)		—			1			1			(2	)
Net change during period		1			—			1			(2	)
Balance, end of period		(31	)		(26	)		(31	)		(26	)
Balance, end of period	$	(40	)	$	(36	)	$	(40	)	$	(36	)