Retirement Benefits (Tables)

3 Months Ended

Mar. 31, 2014

Retirement Benefits [Line Items]

Schedule of Defined Benefit Plans Disclosures [Text Block]

						Other
		Pension Benefits				Postretirement Benefits
		Three Months Ended				Three Months Ended
		March 31,				March 31,
		2014		2013		2014		2013
Service cost		$	69	$	80	$	33	$	41
Interest cost			183		163		55		48
Expected return on assets			(241)		(253)		(38)		(33)
Amortization of:
	Prior service cost (benefit)		3		3		(4)		(4)
	Actuarial loss		105		140		8		20
Net periodic benefit cost		$	119	$	133	$	54	$	72

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

	Three Months Ended March 31,
Pension and Other Postretirement Benefit Costs		2014		2013
Generation	$	75	$	87
ComEd		56		77
PECO		12		11
BGE		16		13
BSC(a)		14		17

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 March 31,
Savings Plan Matching Contributions	2014		2013
Exelon	$	29	$	22
Generation		14		11
ComEd		7		5
PECO		2		2
BGE		3		2
BSC(a)		3		2

• 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.