Merger and Acquisitions (Tables)

12 Months Ended

Dec. 31, 2013

Business Acquisition [Line Items]

Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]

Preliminary Purchase Price Allocation, excluding amortization	Exelon		Generation
Current assets	$	4,936	$	3,638
Property, plant and equipment		9,342		4,054
Unamortized energy contracts		3,218		3,218
Other intangibles, trade name and retail relationships		457		457
Investment in affiliates		1,942		1,942
Pension and OPEB regulatory asset		740		0
Other assets		2,265		1,266
Total assets		22,900		14,575
Current liabilities		3,408		2,804
Unamortized energy contracts		1,722		1,512
Long-term debt, including current maturities		5,632		2,972
Non-controlling interest		90		90
Deferred credits and other liabilities and preferred securities		4,683		1,933
Total liabilities, preferred securities and non-controlling interest		15,535		9,311
Total purchase price	$	7,365	$	5,264

Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]

								Estimated amortization expense
Description	Weighted Average Amortization (Years) (b)	Gross		Accumulated Amortization		Net		2014		2015		2016		2017		2018		2019 and Beyond
Unamortized energy contracts, net (a)	1.5	$	1,499	$	(1,378)	$	121	$	75	$	18	$	(31)	$	(21)	$	11	$	69
Trade name	10.0		243		(46)		197		24		24		24		24		24		77
Retail relationships	12.4		214		(36)		178		19		18		18		18		18		87
Total, net		$	1,956	$	(1,460)	$	496	$	118	$	60	$	11	$	21	$	53	$	233

• Includes the fair value of BGE's power and gas supply contractsof$12 million for which an offsetting Exelon Corporate regulatory asset was also recorded.

(b) Weighted average amortization period was calculated as of the date of acquisition.

Schedule of Restructuring and Related Costs [Text Block]

Year Ended December 31, 2012
Severance Benefits (a)		Exelon (b)		Generation		ComEd (b)		PECO		BGE (b)
Severance charges	$	124	$	80	$	14	$	7	$	17
Stock compensation		7		4		1		0		1
Other charges		7		4		1		0		1
Total severance benefits	$	138	$	88	$	16	$	7	$	19

_________________

• The amounts above include $46 million at Generation, $14 million at ComEd, $7 million at PECO, and $7 million at BGE, for amounts billed by BSC through intercompany allocations for the year ended December 31, 2012.
• Exelon, ComEd and BGE established regulatory assets of $35million, $16 million and $19 million, respectively, for severance benefits costs for the year ended December 31, 2012. The majority of these costs are expected to be recovered over a five-year period.

Schedule Of Severance Costs [TableTextBlock]

Severance Benefits (a)		Exelon		Generation		ComEd		PECO		BGE
Severance charges - 2013	$	18	$	16	$	2	$	0	$	0
Severance charges - 2012		19		14		2		1		3
Severance charges - 2011		5		5		0		0		4

Business Acquisition, Pro Forma Information [Table Text Block]

	Generation				Exelon
		Year Ended December 31,				Year Ended December 31,
(unaudited)		2012		2011 (a)		2012		2011 (b)
Total Revenues	$	17,013	$	19,494	$	26,700	$	30,712
Net income attributable to Exelon		1,205		324		2,092		974
Basic Earnings Per Share		n.a.		n.a.	$	2.56	$	1.15
Diluted Earnings Per Share		n.a.		n.a.		2.55		1.14

_________________

• The amounts above include non-recurring costs directly related to the merger of $203 million for the year ended December 31, 2011.
• The amounts above include non-recurring costs directly related to the merger of $236 million for the year ended December 31, 2011.

Schedule Of Business Acquisitions By Acquisition [Text Block]

Description		Payment Period	BGE		Generation		Exelon		Statement of Operations Location
BGE rate credit of $100 per residential
	customer (a)	Q2 2012	$	113	$	0	$	113	Revenues
Customer investment fund to invest in
	energy efficiency and low-income
	energy assistance to BGE customers	2012 to 2014		0		0		113.5	O&M Expense
Contribution for renewable energy,
	energy efficiency or related projects
	in Baltimore	2012 to 2014		0		0		2	O&M Expense
Charitable contributions at $7 million per
	year for 10 years	2012 to 2021		28		35		70	O&M Expense
State funding for offshore wind
	development projects	Q2 2012		0		0		32	O&M Expense
Miscellaneous tax benefits		Q2 2012		(2)		0		(2)	Taxes Other Than Income
	Total		$	139	$	35	$	328.5

		Acquisitions
		2011
		Wolf Hollow		Antelope Valley
Fair value of consideration transferred
Cash	$	305	$	75
Plus: Gain on PPA settlement		6		-
Total fair value of consideration transferred	$	311	$	75
Recognized amounts of identifiable assets acquired and liabilities assumed
Property, plant and equipment	$	347	$	15
Inventory		5		-
Intangible assets (a)		-		190
Payable to First Solar, Inc. (b)		-		(135)
Working capital, net		(5)		-
Other Assets		-		5
Total net identifiable assets	$	347	$	75
Bargain purchase gain	$	36	$	-

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(a)       See Note 10 - Intangible Assets for additional information.

(b)       Generation concluded that the remaining, yet-to-be paid $135 million in consideration was embedded in the amounts payable under the Engineering, Procurement, Construction (EPC) agreement for First Solar, Inc. to construct the solar facility. For accounting purposes, this aspect of the transaction is considered to be akin to a "seller financing" arrangement. As such, Generation recorded a liability of $135 million associated with the portion of the future payments to First Solar, Inc. under the EPC agreement to reflect Generation's implicit amounts due First Solar, Inc. for the remainder of the value of the net assets acquired. The $135 million payable to First Solar, Inc. will be relieved as Generation makes payments for costs incurred over the project construction period. At December 31, 2012, $87 million remained payable to First Solar, Inc. During 2013, a subsidiary of Generation paid off the remaining balance of the payable to First Solar, Inc.