Accumulated Other Comprehensive Loss

12 Months Ended

Dec. 31, 2015

Equity [Abstract]

Accumulated Other Comprehensive Loss

(18) ACCUMULATED OTHER COMPREHENSIVE LOSS

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

	Year Ended December 31,
	2015			2014			2013
	(millions of dollars)
Balance as of January 1	$	(46	)	$	(34	)	$	(48	)
Treasury Lock
Balance as of January 1		(9	)		(9	)		(10	)
Amount of pre-tax loss reclassified to Interest expense		1			1			1
Income tax expense		—			1			—
Balance as of December 31		(8	)		(9	)		(9	)
Pension and Other Postretirement Benefits
Balance as of January 1		(37	)		(25	)		(32	)
Amount of amortization of net prior service cost and actuarial loss reclassified to Other operation and maintenance expense		6			5			5
Amount of net prior service cost and actuarial gain (loss) arising during the year		9			(25	)		8
Income tax (benefit) expense		6			(8	)		6
Balance as of December 31		(28	)		(37	)		(25	)
Commodity Derivatives
Balance as of January 1		—			—			(6	)
Amount of net pre-tax loss reclassified to Income (loss) from discontinued operations before income tax		—			—			10
Income tax expense		—			—			4
Balance as of December 31		—			—			—
Balance as of December 31	$	(36	)	$	(46	)	$	(34	)