Retirement Benefits (All Registrants)

Exelon sponsors defined benefit pension plans and other postretirement benefit plans for essentially all employees.

Effective March 31, 2017, in connection with the acquisition of FitzPatrick, Exelon established a new qualified pension plan and a new other postretirement employee benefit plan, and recorded benefit plan obligations of $38 million and $11 million, respectively. Refer to Note 4 - Mergers, Acquisitions and Dispositions for additional discussion of the acquisition of FitzPatrick.

Effective March 23, 2016, Exelon became the sponsor of all of PHI's defined benefit pension and other postretirement benefit plans, and assumed PHI's benefit plan obligations and related assets. As a result, PHI's benefit plan net obligation and related regulatory assets were transferred to Exelon.

Defined Benefit Pension and Other Postretirement Benefits

During the first quarter of 2017, Exelon received an updated valuation of its pension and other postretirement benefit obligations to reflect actual census data as of January 1, 2017. This valuation resulted in an increase to the pension obligation of $92 million and an increase to the other postretirement benefit obligation of $57 million. Additionally, accumulated other comprehensive loss increased by approximately $59 million (after tax), regulatory assets increased by approximately $57 million and regulatory liabilities increased by approximately $4 million.

The majority of the 2017 pension benefit cost for Exelon-sponsored plans is calculated using an expected long-term rate of return on plan assets of 7.00% and a discount rate of 4.04%. The majority of the 2017 other postretirement benefit cost is calculated using an expected long-term rate of return on plan assets of 6.58% for funded plans and a discount rate of 4.04%.

A portion of the net periodic benefit cost for all plans is capitalized within the Consolidated Balance Sheets. The following tables present the components of Exelon's net periodic benefit costs, prior to capitalization, for the three months ended March 31, 2017 and 2016 and PHI's net periodic benefit costs, prior to capitalization, for the predecessor period of January 1, 2016 to March 23, 2016.



	Pension Benefits Three Months Ended March 31,						Other Postretirement Benefits Three Months Ended March 31,
	2017			2016(a)			2017			2016(a)
Components of net periodic benefit cost:
Service cost	$	95		$	78		$	26		$	26
Interest cost	210			190			45			43
Expected return on assets	(299		)	(263		)	(41		)	(38		)
Amortization of:
Prior service cost (benefit)	—			3			(47		)	(44		)
Actuarial loss	152			127			16			14
Net periodic benefit cost	$	158		$	135		$	(1	)	$	1

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(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
	January 1, 2016 to March 23, 2016			January 1, 2016 to March 23, 2016
Components of net periodic benefit cost:
Service cost	$	12		$	1
Interest cost	26			6
Expected return on assets	(30		)	(5		)
Amortization of:
Prior service cost (benefit)	—			(3		)
Actuarial loss	14			2
Net periodic benefit cost	$	22		$	1

The amounts below represent Exelon's, Generation's, ComEd's, PECO's, BGE's, PHI'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 months ended March 31, 2017 and 2016 and PHI's for the predecessor and successor periods of January 1, 2016 to March 23, 2016 and March 24, 2016 to March 31, 2016, respectively.



	Three Months Ended March 31,
Pension and Other Postretirement Benefit Costs	2017		2016
Exelon	$	157	$	136
Generation	54		54
ComEd	44		41
PECO	7		8
BGE	16		16
BSC^(a)	12		14
Pepco^(b)	7		8
DPL^(b)	3		5
ACE^(b)	3		4
PHISCO^(a)(b)	11		9



	Successor		Predecessor
Pension and Other Postretirement Benefit Costs	March 24, 2016 to March 31, 2016		January 1, 2016 to March 23, 2016
PHI	$	3	$	23

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(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.


(b)	Pepco's, DPL's, ACE's and PHISCO's pension and postretirement benefit costs for the three months ended March 31, 2016 include $7 million, $4 million, $3 million and $9 million, respectively, of costs incurred prior to the closing of Exelon’s merger with PHI on March 23, 2016.

Defined Contribution Savings Plans

The Registrants participate in various 401(k) defined contribution savings plans that are sponsored by Exelon. The plans are qualified under applicable sections of the IRC and allow employees to contribute a portion of their pre-tax and/or after-tax income in accordance with specified guidelines. All Registrants match a percentage of the employee contributions up to certain limits. The following table presents the matching contributions to the savings plans during the three months ended March 31, 2017 and 2016:



	Three Months Ended March 31,
Savings Plan Matching Contributions	2017		2016
Exelon	$	30	$	26
Generation	14		12
ComEd	7		6
PECO	2		2
BGE	2		1
BSC^(a)	2		5
Pepco^(b)	1		1
DPL^(b)	1		1
PHISCO^(a)(b)	1		1



	Successor		Predecessor
Savings Plan Matching Contributions	March 24, 2016 to March 31, 2016		January 1, 2016 to March 23, 2016
PHI	$	—	$	3

_________


(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 three months ended March 31, 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 three months ended March 31, 2016.