Retirement Benefits (Tables)

6 Months Ended

Jun. 30, 2016

Compensation and Retirement Disclosure [Abstract]

Schedule Of Pension And Other Postretirement Benefit Costs

The amounts below represent Exelon's, Generation's, ComEd's, PECO's, BGE's, Pepco's, DPL's, ACE's, BSC's and PHISCO's allocated portion of the pension and postretirement benefit plan costs, which were included in Property, plant and equipment within the respective Consolidated Balance Sheets and Operating and maintenance expense within the Consolidated Statement of Operations and Comprehensive Income during the three and six months ended June 30, 2016 and 2015.

	Three Months Ended June 30,				Six Months Ended June 30,
Pension and Other Postretirement Benefit Costs	2016		2015		2016		2015
Exelon	$	160	$	160	$	297	$	317
Generation	55		68		109		133
ComEd	42		51		83		103
PECO	8		10		17		19
BGE	18		17		33		33
BSC(a)	10		14		24		29
Pepco(b)	7		7		16		15
DPL(b)	4		4		9		8
ACE(b)	4		4		8		8
PHISCO(a)(b)	12		9		21		17

	Successor		Predecessor		Successor		Predecessor
Pension and Other Postretirement Benefit Costs	Three Months Ended June 30, 2016		Three Months Ended June 30, 2015		March 24, 2016 to June 30, 2016		January 1, 2016 to March 23, 2016		Six Months Ended June 30, 2015
PHI	$	27	$	24	$	31	$	23	$	48

_________ 

(a) These amounts primarily represent amounts billed to Exelon’s subsidiaries through intercompany allocations. These amounts are not included in the Generation, ComEd, PECO, BGE, PHI, Pepco, DPL or ACE amounts above.

Schedule Of Defined Contributions

The following table presents the matching contributions to the savings plans during the three and six months ended June 30, 2016 and 2015:

	Three Months Ended June 30,				Six Months Ended June 30,
Savings Plan Matching Contributions	2016		2015		2016		2015
Exelon	$	30	$	38	$	56	$	60
Generation	13		20		25		33
ComEd	7		8		13		13
PECO	2		3		4		4
BGE	2		3		3		5
BSC(a)	2		4		7		5
Pepco(b)	1		1		2		2
DPL(b)	—		1		1		1
PHISCO(a)(b)	2		1		3		3
ACE(b)	1		1		1		1

	Successor		Predecessor		Successor		Predecessor
Savings Plan Matching Contributions	Three Months Ended June 30, 2016		Three Months Ended June 30, 2015		March 24, 2016 to June 30, 2016		January 1, 2016 to March 23, 2016		Six Months Ended June 30, 2015
PHI	$	4	$	4	$	4	$	3	$	7

_________ 

(a) These amounts primarily represent amounts billed to Exelon and PHI's subsidiaries through intercompany allocations. These costs are not included in the Generation, ComEd, PECO, BGE, Pepco and DPL amounts above.

(b) Pepco's, DPL's and PHISCO's matching contributions for the six months ended June 30, 2016 include $1 million, $1 million,and $1 million, respectively, of costs incurred prior to the closing of Exelon’s merger with PHI on March 23, 2016, which is not included in Exelon’s matching contributions for the six months ended June 30, 2016.

Schedule of Net Benefit Costs [Table Text Block]

	Pension Benefits Three Months Ended June 30,						Other Postretirement Benefits Three Months Ended June 30,
	2016			2015			2016			2015
Service cost	$	91		$	81		$	28		$	29
Interest cost	212			178			48			42
Expected return on assets	(292		)	(256		)	(42		)	(37		)
Amortization of:
Prior service cost (benefit)	4			4			(47		)	(44		)
Actuarial loss	142			142			16			21
Net periodic benefit cost	$	157		$	149		$	3		$	11

	Pension Benefits Six Months Ended June 30,						Other Postretirement Benefits Six Months Ended June 30,
	2016(a)			2015			2016(a)			2015
Components of net periodic benefit cost:
Service cost	$	170		$	163		$	54		$	59
Interest cost	403			355			90			83
Expected return on assets	(555		)	(513		)	(80		)	(75		)
Amortization of:
Prior service cost (benefit)	7			7			(91		)	(88		)
Actuarial loss	269			285			30			41
Net periodic benefit cost	$	294		$	297		$	3		$	20

_______

(a) PHI net periodic benefit costs for the period prior to the merger are not included in the table above.

	Predecessor
	PHI
	Pension Benefits									Other Postretirement Benefits
Components of net periodic benefit cost:	January 1, 2016 to March 23, 2016			Three Months Ended June 30, 2015			Six Months Ended June 30, 2015			January 1, 2016 to March 23, 2016			Three Months Ended June 30, 2015			Six Months Ended June 30, 2015
Service cost	$	12		$	14		$	28		$	1		$	1		$	3
Interest cost	26			27			54			6			6			12
Expected return on assets	(30		)	(35		)	(70		)	(5		)	(5		)	(11		)
Amortization of:
Prior service cost (benefit)	—			1			1			(3		)	(3		)	(6		)
Actuarial loss	14			17			33			2			1			4
Net periodic benefit cost	$	22		$	24		$	46		$	1		$	—		$	2