Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2013

Accounting Policies [Abstract]

Annual Depreciation Rates

The table below provides system-wide composite annual depreciation rates for the years ended December 31, 2013, 2012 and 2011.

	Transmission and Distribution									Generation
	2013			2012			2011			2013			2012			2011
Pepco		2.2	%		2.5	%		2.6	%		—			—			—
DPL		2.6	%		2.7	%		2.8	%		—			—			—
ACE		2.8	%		3.0	%		3.0	%		—			—			—
Pepco Energy Services (a)		—			—			—			0.4	%		6.4	%		10.2	%

(a) Percentages reflect accelerated depreciation of the Benning Road and Buzzard Point generating facilities retired during 2012.

Effects of Revision on PHI's Consolidated Balance Sheets

The table below illustrates the effects of the revision on reported balances in PHI’s consolidated financial statements.

	As Filed			Adjustment			As Revised
	(millions of dollars)
December 31, 2012
Deferred income tax liabilities, net	$	3,176		$	32		$	3,208
Total deferred credits		4,819	(a)		32			4,851
Retained earnings		1,109			(32	)		1,077
Total equity		4,446			(32	)		4,414
December 31, 2011
Deferred income tax liabilities, net	$	2,863		$	32		$	2,895
Total deferred credits		4,549	(a)		32			4,581
Retained earnings		1,072			(32	)		1,040
Total equity		4,336			(32	)		4,304
December 31, 2010
Retained earnings	$	1,059		$	(32	)	$	1,027
Total equity		4,230	(b)		(32	)		4,198

(a) The amount of total deferred credits differs from the amount orginially reported in PHI’s 2012 Form 10-K due to certain reclassifications.

(b) The amount represents total shareholders’ equity, which excludes a non-controlling interest of $6 million.