Retirement Benefits (Tables)

6 Months Ended

Jun. 30, 2014

Retirement Benefits [Line Items]

Schedule of Defined Benefit Plans Disclosures [Text Block]

		Pension Benefits				Other Postretirement Benefits
		Three Months Ended				Three Months Ended
		June 30,				June 30,
		2014(a)		2013		2014(a)		2013
Service cost		$	69	$	79	$	29	$	40
Interest cost			184		163		45		49
Expected return on assets			(242)		(254)		(38)		(33)
Amortization of:
	Prior service cost (benefit)		4		4		(30)		(6)
	Actuarial loss		104		141		12		21
Net periodic benefit cost		$	119	$	133	$	18	$	71
		Pension Benefits				Other Postretirement Benefits
		Six Months Ended				Six Months Ended
		June 30,				June 30,
		2014(a)		2013		2014(a)		2013
Service cost		$	138	$	159	$	61	$	81
Interest cost			367		326		101		97
Expected return on assets			(483)		(508)		(76)		(66)
Amortization of:
	Prior service cost (benefit)		7		7		(34)		(10)
	Actuarial loss		209		281		20		42
Net periodic benefit cost		$	238	$	265	$	72	$	144

Schedule Of Pension And Other Postretirement Benefit Costs [Text Block]

	Pension Benefits		Other Postretirement Benefits
Service cost	$	5	$	1
Interest cost		6		2
Expected return on assets		(9)		0
Net periodic benefit cost	$	2	$	3

	Three Months Ended				Six Months Ended
	June 30,				June 30,
Pension and Other Postretirement Benefit Costs	2014		2013		2014		2013
Generation(a)	$	63	$	87	$	139	$	173
ComEd		40		77		96		154
PECO		9		10		21		21
BGE		17		14		33		27
BSC(b)		13		16		26		34

These amounts primarily represent amounts billed to Exelon's subsidiaries through intercompany allocations. These amounts are not included in the Generation, ComEd, PECO or BGE amounts above.

Schedule Of Defined Contributions [Text Block]

	Three Months Ended				Six Months Ended
	June 30,				June 30,
Savings Plan Matching Contributions	2014		2013		2014		2013
Exelon(a)	$	19	$	21	$	48	$	43
Generation(a)		10		10		24		21
ComEd		5		5		12		10
PECO		2		2		4		4
BGE		1		2		4		4
BSC(b)		1		2		4		4

• Includes $1 million of matching contributions to CENG's 401(k) defined contribution savings plan for the period April 1, 2014 to June 30, 2014.
• These amounts primarily represent amounts billed to Exelon's subsidiaries through intercompany allocations. These costs are not included in the Generation, ComEd, PECO or BGE amounts above.