Supplemental Financial Information (All Registrants)

Supplemental Statement of Operations Information

The following tables provide additional information about the Registrants’ Consolidated Statements of Operations and Comprehensive Income for the three and six months ended June 30, 2018 and 2017.



	Three Months Ended June 30, 2018
	Exelon			Generation			ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Other, Net
Decommissioning-related activities:
Net realized income on decommissioning trust funds^(a)
Regulatory agreement units	$	216		$	216		$	—	$	—	$	—	$	—	$	—	$	—	$	—
Non-regulatory agreement units	143			143			—		—		—		—		—		—		—
Net unrealized losses on decommissioning trust funds
Regulatory agreement units	(194		)	(194		)	—		—		—		—		—		—		—
Non-regulatory agreement units	(120		)	(120		)	—		—		—		—		—		—		—
Net unrealized gains on pledged assets
Zion Station decommissioning	4			4			—		—		—		—		—		—		—
Regulatory offset to decommissioning trust fund-related activities^(b)	(23		)	(23		)	—		—		—		—		—		—		—
Total decommissioning-related activities	26			26			—		—		—		—		—		—		—
Investment income	6			5			—		—		—		—		—		—		—
Interest income related to uncertain income tax positions	2			—			—		—		—		—		—		—		—
AFUDC — Equity	13			—			2		—		4		7		6		1		—
Non-service net periodic benefit cost	(11		)	—			—		—		—		—		—		—		—
Other	8			(2		)	2		—		—		4		2		2		1
Other, net	$	44		$	29		$	4	$	—	$	4	$	11	$	8	$	3	$	1



	Six Months Ended June 30, 2018
	Exelon			Generation			ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Other, Net
Decommissioning-related activities:
Net realized income on decommissioning trust funds^(a)
Regulatory agreement units	$	262		$	262		$	—	$	—	$	—	$	—	$	—	$	—	$	—
Non-regulatory agreement units	199			199			—		—		—		—		—		—		—
Net unrealized losses on decommissioning trust funds
Regulatory agreement units	(268		)	(268		)	—		—		—		—		—		—		—
Non-regulatory agreement units	(215		)	(215		)	—		—		—		—		—		—		—
Net unrealized gains on pledged assets
Zion Station decommissioning	2			2			—		—		—		—		—		—		—
Regulatory offset to decommissioning trust fund-related activities^(b)	(1		)	(1		)	—		—		—		—		—		—		—
Total decommissioning-related activities	(21		)	(21		)	—		—		—		—		—		—		—
Investment income	10			7			—		—		—		—		—		—		—
Interest income related to uncertain income tax positions	4			1			—		—		—		—		—		—		—
AFUDC — Equity	31			—			8		2		8		13		12		1		—
Non-service net periodic benefit cost	(21		)	—			—		—		—		—		—		—		—
Other	14			(2		)	4		—		1		9		4		4		1
Other, net	$	17		$	(15	)	$	12	$	2	$	9	$	22	$	16	$	5	$	1



	Three Months Ended June 30, 2017
	Exelon			Generation			ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Other, Net
Decommissioning-related activities:
Net realized income on decommissioning trust funds^(a)
Regulatory agreement units	$	211		$	211		$	—	$	—	$	—	$	—	$	—	$	—	$	—
Non-regulatory agreement units	74			74			—		—		—		—		—		—		—
Net unrealized (losses) gains on decommissioning trust funds
Regulatory agreement units	(13		)	(13		)	—		—		—		—		—		—		—
Non-regulatory agreement units	70			70			—		—		—		—		—		—		—
Net unrealized losses on pledged assets
Zion Station decommissioning	(2		)	(2		)	—		—		—		—		—		—		—
Regulatory offset to decommissioning trust fund-related activities^(b)	(160		)	(160		)	—		—		—		—		—		—		—
Total decommissioning-related activities	180			180			—		—		—		—		—		—		—
Investment income	2			1			—		—		—		—		—		—		—
Interest expense related to uncertain income tax positions	(1		)	—			—		—		—		—		—		—		—
Penalty income related to uncertain income tax positions	1			—			—		—		—		—		—		—		—
AFUDC — Equity	17			—			2		2		4		9		5		2		2
Non-service net periodic benefit cost	(28		)	—			—		—		—		—		—		—		—
Other	6			—			2		—		—		4		2		1		—
Other, net	$	177		$	181		$	4	$	2	$	4	$	13	$	7	$	3	$	2



	Six Months Ended June 30, 2017
	Exelon			Generation			ComEd		PECO			BGE		PHI		Pepco		DPL		ACE
Other, Net
Decommissioning-related activities:
Net realized income on decommissioning trust funds^(a)
Regulatory agreement units	$	280		$	280		$	—	$	—		$	—	$	—	$	—	$	—	$	—
Non-regulatory agreement units	106			106			—		—			—		—		—		—		—
Net unrealized gains on decommissioning trust funds
Regulatory agreement units	210			210			—		—			—		—		—		—		—
Non-regulatory agreement units	235			235			—		—			—		—		—		—		—
Net unrealized losses on pledged assets
Zion Station decommissioning	(2		)	(2		)	—		—			—		—		—		—		—
Regulatory offset to decommissioning trust fund-related activities^(b)	(396		)	(396		)	—		—			—		—		—		—		—
Total decommissioning-related activities	433			433			—		—			—		—		—		—		—
Investment income (expense)	4			3			—		(1		)	—		1		1		—		—
Penalty income related to uncertain income tax positions	2			—			—		—			—		—		—		—		—
AFUDC — Equity	33			—			4		4			8		17		11		3		3
Non-service net periodic benefit cost	(54		)	—			—		—			—		—		—		—		—
Other	16			4			4		—			—		8		3		3		1
Other, net	$	434		$	440		$	8	$	3		$	8	$	26	$	15	$	6	$	4

_________


(a)	Includes investment income and realized gains and losses on sales of investments of the trust funds.


(b)	Includes the elimination of NDT fund activity for the Regulatory Agreement Units, including the elimination of net income taxes related to all NDT fund activity for those units. See Note 15 — Asset Retirement Obligations of the Exelon 2017 Form 10-K for additional information regarding the accounting for nuclear decommissioning.

The following utility taxes are included in revenues and expenses for the three and six months ended June 30, 2018 and 2017. Generation’s utility tax expense represents gross receipts tax related to its retail operations, and the Utility Registrants' utility tax expense represents municipal and state utility taxes and gross receipts taxes related to their operating revenues. The offsetting collection of utility taxes from customers is recorded in revenues on the Registrants’ Consolidated Statements of Operations and Comprehensive Income.



	Three Months Ended June 30, 2018
	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Utility taxes	$	218	$	29	$	60	$	30	$	21	$	78	$	73	$	5	$	—



	Six Months Ended June 30, 2018
	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Utility taxes	$	452	$	60	$	121	$	63	$	47	$	161	$	151	$	10	$	—



	Three Months Ended June 30, 2017
	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Utility taxes	$	213	$	30	$	57	$	29	$	21	$	76	$	72	$	4	$	—



	Six Months Ended June 30, 2017
	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Utility taxes	$	438	$	63	$	116	$	60	$	47	$	152	$	143	$	9	$	—

Supplemental Cash Flow Information

The following tables provide additional information regarding the Registrants’ Consolidated Statements of Cash Flows for the six months ended June 30, 2018 and 2017.



	Six Months Ended June 30, 2018
	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Depreciation, amortization and accretion
Property, plant and equipment^(a)	$	1,873	$	890	$	406	$	135	$	164	$	236	$	107	$	64	$	47
Amortization of regulatory assets^(a)	278		—		53		14		84		127		81		24		22
Amortization of intangible assets, net^(a)	28		24		—		—		—		—		—		—		—
Amortization of energy contract assets and liabilities^(b)	10		10		—		—		—		—		—		—		—
Nuclear fuel^(c)	569		569		—		—		—		—		—		—		—
ARO accretion^(d)	242		242		—		—		—		—		—		—		—
Total depreciation, amortization and accretion	$	3,000	$	1,735	$	459	$	149	$	248	$	363	$	188	$	88	$	69



	Six Months Ended June 30, 2017
	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Depreciation, amortization and accretion
Property, plant and equipment^(a)	$	1,545	$	612	$	384	$	129	$	155	$	227	$	101	$	61	$	44
Amortization of regulatory assets^(a)	238		—		35		12		84		105		59		18		28
Amortization of intangible assets, net^(a)	28		25		—		—		—		—		—		—		—
Amortization of energy contract assets and liabilities^(b)	20		20		—		—		—		—		—		—		—
Nuclear fuel^(c)	529		529		—		—		—		—		—		—		—
ARO accretion^(d)	231		229		—		—		—		—		—		—		—
Total depreciation, amortization and accretion	$	2,591	$	1,415	$	419	$	141	$	239	$	332	$	160	$	79	$	72

_________


(a)	Included in Depreciation and amortization on the Registrants' Consolidated Statements of Operations and Comprehensive Income.


(b)	Included in Operating revenues or Purchased power and fuel expense on the Registrants’ Consolidated Statements of Operations and Comprehensive Income.


(c)	Included in Purchased power and fuel expense on the Registrants’ Consolidated Statements of Operations and Comprehensive Income.


(d)	Included in Operating and maintenance expense on the Registrants’ Consolidated Statements of Operations and Comprehensive Income.



	Six Months Ended June 30, 2018
	Exelon			Generation			ComEd			PECO			BGE			PHI			Pepco			DPL		ACE
Other non-cash operating activities:
Pension and non-pension postretirement benefit costs	$	290		$	100		$	88		$	10		$	29		$	34		$	8		$	3	$	6
Loss from equity method investments	12			12			—			—			—			—			—			—		—
Provision for uncollectible accounts	77			28			18			11			5			15			7			2		5
Stock-based compensation costs	47			—			—			—			—			—			—			—		—
Other decommissioning-related activity^(a)	(61		)	(61		)	—			—			—			—			—			—		—
Energy-related options^(b)	(7		)	(7		)	—			—			—			—			—			—		—
Amortization of regulatory asset related to debt costs	4			—			2			—			—			2			1			1		—
Amortization of rate stabilization deferral	13			—			—			—			—			13			10			3		—
Amortization of debt fair value adjustment	(7		)	(6		)	—			—			—			(1		)	—			—		—
Discrete impacts from EIMA and FEJA^(c)	14			—			14			—			—			—			—			—		—
Amortization of debt costs	18			7			2			1			1			3			1			—		—
Provision for excess and obsolete inventory	13			12			1			—			—			—			—			—		—
Long-term incentive plan	51			—			—			—			—			—			—			—		—
Other	15			—			(8		)	—			(8		)	5			(3		)	5		1
Total other non-cash operating activities	$	479		$	85		$	117		$	22		$	27		$	71		$	24		$	14	$	12
Non-cash investing and financing activities:
(Decrease) increase in capital expenditures not paid	$	(283	)	$	(310	)	$	(22	)	$	(17	)	$	10		$	61		$	28		$	17	$	14
Increase in PPE related to ARO update	47			47			—			—			—			—			—			—		—
Dividends on stock compensation	3			—			—			—			—			—			—			—		—
Acquisition of land	3			—			—			—			—			3			—			—		3



	Six Months Ended June 30, 2017
	Exelon			Generation			ComEd			PECO			BGE			PHI			Pepco			DPL			ACE
Other non-cash operating activities:
Pension and non-pension postretirement benefit costs	$	320		$	113		$	87		$	14		$	31		$	48		$	13		$	6		$	7
Loss from equity method investments	19			19			—			—			—			—			—			—			—
Provision for uncollectible accounts	52			19			15			9			3			6			4			—			2
Stock-based compensation costs	57			—			—			—			—			—			—			—			—
Other decommissioning-related activity^(a)	(144		)	(144		)	—			—			—			—			—			—			—
Energy-related options^(b)	11			11			—			—			—			—			—			—			—
Amortization of regulatory asset related to debt costs	4			—			2			—			—			2			1			1			—
Amortization of rate stabilization deferral	(8		)	—			—			—			7			(15		)	(10		)	(5		)	—
Amortization of debt fair value adjustment	(9		)	(6		)	—			—			—			(3		)	—			—			—
Discrete impacts from EIMA and FEJA ^(c)	(51		)	—			(51		)	—			—			—			—			—			—
Amortization of debt costs	49			30			2			1			1			—			—			—			—
Provision for excess and obsolete inventory	51			49			1			—			—			1			—			—			—
Merger-related commitments^(d)	—			—			—			—			—			(8		)	(6		)	(2		)	—
Severance costs	25			17			—			—			—			3			—			—			—
Other	39			13			2			(2		)	(7		)	(6		)	(2		)	(3		)	(2		)
Total other non-cash operating activities	$	415		$	121		$	58		$	22		$	35		$	28		$	—		$	(3	)	$	7
Non-cash investing and financing activities:
(Decrease) increase in capital expenditures not paid	$	(105	)	$	48		$	(82	)	$	(44	)	$	6		$	(8	)	$	—		$	15		$	(14	)
Fair value of pension obligation transferred in connection with the FitzPatrick acquisition	—			49			—			—			—			—			—			—			—
Change in PPE related to ARO update	103			103			—			—			—			—			—			—			—
Indemnification of like-kind exchange tax position^(e)	—			—			23			—			—			—			—			—			—
Non-cash financing of capital projects	13			13			—			—			—			—			—			—			—
Dividends on stock compensation	3			—			—			—			—			—			—			—			—
Loss on reissuance of treasury stock	1,054			—			—			—			—			—			—			—			—

_________

(a)

Includes the elimination of NDT fund activity for the Regulatory Agreement Units, including the elimination of operating revenues, ARO accretion, ARC amortization, investment income and income taxes related to all NDT fund activity for these units. See Note 15 — Asset Retirement Obligations of the Exelon 2017 Form 10-K for additional information regarding the accounting for nuclear decommissioning.


(b)	Includes option premiums reclassified to realized at the settlement of the underlying contracts and recorded in Operating revenues and expenses.


(c)	Reflects the change in ComEd's distribution and energy efficiency formula rates. See Note 6 — Regulatory Matters for additional information.


(d)	See Note 4 - Mergers, Acquisitions and Dispositions for additional information.


(e)	See Note 12 - Income Taxes for discussion of the like-kind exchange tax position.

The following tables provide a reconciliation of cash, cash equivalents and restricted cash reported within the Registrants’ Consolidated Balance Sheets that sum to the total of the same amounts in their Consolidated Statements of Cash Flows.



June 30, 2018	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Cash and cash equivalents	$	694	$	420	$	30	$	18	$	7	$	195	$	47	$	141	$	6
Restricted cash	206		130		5		5		1		38		33		—		5
Restricted cash included in other long-term assets	128		—		108		—		—		20		—		—		20
Total cash, cash equivalents and restricted cash	$	1,028	$	550	$	143	$	23	$	8	$	253	$	80	$	141	$	31



December 31, 2017	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Cash and cash equivalents	$	898	$	416	$	76	$	271	$	17	$	30	$	5	$	2	$	2
Restricted cash	207		138		5		4		1		42		35		—		6
Restricted cash included in other long-term assets	85		—		63		—		—		23		—		—		23
Total cash, cash equivalents and restricted cash	$	1,190	$	554	$	144	$	275	$	18	$	95	$	40	$	2	$	31



June 30, 2017	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Cash and cash equivalents	$	536	$	265	$	39	$	45	$	12	$	151	$	119	$	6	$	7
Restricted cash	252		166		12		4		6		40		34		—		7
Restricted cash included in other long-term assets	23		—		—		—		—		23		—		—		23
Total cash, cash equivalents and restricted cash	$	811	$	431	$	51	$	49	$	18	$	214	$	153	$	6	$	37



December 31, 2016	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Cash and cash equivalents	$	635	$	290	$	56	$	63	$	23	$	170	$	9	$	46	$	101
Restricted cash	253		158		2		4		24		43		33		—		9
Restricted cash included in other long-term assets	26		—		—		—		3		23		—		—		23
Total cash, cash equivalents and restricted cash	$	914	$	448	$	58	$	67	$	50	$	236	$	42	$	46	$	133

For additional information on restricted cash see Note 1 — Significant Accounting Policies of the Exelon 2017 Form 10-K.

Supplemental Balance Sheet Information

The following tables provide additional information about assets and liabilities of the Registrants as of June 30, 2018 and December 31, 2017.



June 30, 2018	Exelon			Generation			ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Property, plant and equipment:
Accumulated depreciation and amortization	$	22,302	^(a)	$	12,143	^(a)	$	4,491	$	3,482	$	3,530	$	671	$	3,269	$	1,295	$	1,105
Accounts receivable:
Allowance for uncollectible accounts	$	339		$	123		$	82	$	57	$	21	$	55	$	23	$	14	$	18



December 31, 2017	Exelon			Generation			ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Property, plant and equipment:
Accumulated depreciation and amortization	$	21,064	^(b)	$	11,428	^(b)	$	4,269	$	3,411	$	3,405	$	487	$	3,177	$	1,247	$	1,066
Accounts receivable:
Allowance for uncollectible accounts	$	322		$	114		$	73	$	56	$	24	$	55	$	21	$	16	$	18

_________


(a)	Includes accumulated amortization of nuclear fuel in the reactor core of $3,094 million.


(b)	Includes accumulated amortization of nuclear fuel in the reactor core of $3,159 million.

PECO Installment Plan Receivables (Exelon and PECO)

PECO enters into payment agreements with certain delinquent customers, primarily residential, seeking to restore their service, as required by the PAPUC. Customers with past due balances that meet certain income criteria are provided the option to enter into an installment payment plan, some of which have terms greater than one year. The receivable balance for these payment agreement receivables is recorded in accounts receivable for the current portion and other deferred debits and other assets for the noncurrent portion. The net receivable balance for installment plans with terms greater than one year was $11 million as of June 30, 2018 and December 31, 2017. The allowance for uncollectible accounts balance associated with these receivables at June 30, 2018 of $12 million consists of $4 million and $8 million for medium risk and high risk segments, respectively. The allowance for uncollectible accounts balance at December 31, 2017 of $11 million consists of $3 million and $8 million for medium risk and high risk segments, respectively. See Note 1 — Significant Accounting Policies of the Exelon 2017 Form 10-K for additional information regarding uncollectible accounts reserve methodology and assessment of the credit quality of the installment plan receivables.