Supplemental Financial Information (Tables)

12 Months Ended

Dec. 31, 2018

Supplemental Financial Information [Abstract]

Schedule Of Taxes Excluding Income And Excise Taxes [Table Text Block]

The following tables provide additional information about the Registrants’ Consolidated Statements of Operations and Comprehensive Income for the years ended December 31, 2018, 2017 and 2016.

	For the year ended December 31, 2018
											Successor
	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Taxes other than income
Utility(a)	$	919	$	114	$	243	$	131	$	94	$	337	$	316	$	21	$	—
Property	557		273		30		15		143		94		58		32		3
Payroll	247		130		27		16		17		24		5		3		2
Other	60		39		11		1		—		—		—		—		—
Total taxes other than income	$	1,783	$	556	$	311	$	163	$	254	$	455	$	379	$	56	$	5

	For the year ended December 31, 2017
											Successor
	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Taxes other than income
Utility(a)	$	898	$	126	$	240	$	125	$	89	$	318	$	300	$	18	$	—
Property	545		269		28		14		132		101		62		32		3
Payroll	230		121		26		15		15		26		6		4		2
Other	58		39		2		—		4		7		3		3		1
Total taxes other than income	$	1,731	$	555	$	296	$	154	$	240	$	452	$	371	$	57	$	6

																		Successor		Predecessor
	For the year ended December 31, 2016																	March 24, 2016 to December 31, 2016		January 1, 2016 to March 23, 2016
	Exelon		Generation		ComEd			PECO		BGE		Pepco		DPL		ACE		PHI		PHI
Taxes other than income
Utility(a)	$	753	$	122	$	242		$	136	$	85	$	312	$	18	$	—	$	253	$	78
Property	483		246		27			13		123		53		31		3		73		18
Payroll	226		117		28			15		17		8		5		3		23		8
Other	114		21		(4		)	—		4		4		1		1		5		1
Total taxes other than income	$	1,576	$	506	$	293		$	164	$	229	$	377	$	55	$	7	$	354	$	105

__________ 

(a) Generation’s utility tax represents gross receipts tax related to its retail operations and ComEd’s, PECO’s, BGE’s, Pepco's, DPL's and ACE's utility taxes represent 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 in the Registrants’ Consolidated Statements of Operations and Comprehensive Income.

Schedule of Other Nonoperating Income, by Component [Table Text Block]

	For the year ended December 31, 2018
													Successor
	Exelon			Generation			ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Other, Net
Decommissioning-related activities:
Net realized income on NDT funds(a)
Regulatory agreement units	$	506		$	506		$	—	$	—	$	—	$	—	$	—	$	—	$	—
Non-regulatory agreement units	302			302			—		—		—		—		—		—		—
Net unrealized losses on NDT funds
Regulatory agreement units	(715		)	(715		)	—		—		—		—		—		—		—
Non-regulatory agreement units	(483		)	(483		)	—		—		—		—		—		—		—
Net unrealized losses on pledged assets
Zion Station decommissioning	(8		)	(8		)	—		—		—		—		—		—		—
Regulatory offset to NDT fund-related activities(b)	171			171			—		—		—		—		—		—		—
Total decommissioning-related activities	(227		)	(227		)	—		—		—		—		—		—		—
Investment income	43			32			—		1		1		4		2		1		—
Interest income related to uncertain income tax positions	5			1			—		—		—		—		—		—		—
AFUDC—Equity	69			—			19		7		18		25		22		2		1
Non-service net periodic benefit cost	(47		)	—			—		—		—		—		—		—		—
Other	45			16			14		—		—		14		7		7		1
Other, net	$	(112	)	$	(178	)	$	33	$	8	$	19	$	43	$	31	$	10	$	2

	For the year ended December 31, 2017
													Successor
	Exelon			Generation			ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Other, Net
Decommissioning-related activities:
Net realized income on NDT funds(a)
Regulatory agreement units	$	488		$	488		$	—	$	—	$	—	$	—	$	—	$	—	$	—
Non-regulatory agreement units	209			209			—		—		—		—		—		—		—
Net unrealized gains on NDT funds
Regulatory agreement units	455			455			—		—		—		—		—		—		—
Non-regulatory agreement units	521			521			—		—		—		—		—		—		—
Net unrealized losses on pledged assets
Zion Station decommissioning	(10		)	(10		)	—		—		—		—		—		—		—
Regulatory offset to NDT fund-related activities(b)	(724		)	(724		)	—		—		—		—		—		—		—
Total decommissioning-related activities	939			939			—		—		—		—		—		—		—
Investment income	8			6			—		—		—		2		1		—		—
Interest income (expense) related to uncertain income tax positions	3			(1		)	—		—		—		—		—		—		—
Benefit related to uncertain income tax positions(c)	2			—			—		—		—		—		—		—		—
AFUDC—Equity	73			—			12		9		16		36		23		7		6
Non-service net periodic benefit cost	(109		)	—			—		—		—		—		—		—		—
Other	31			4			10		—		—		16		8		7		1
Other, net	$	947		$	948		$	22	$	9	$	16	$	54	$	32	$	14	$	7

																					Successor			Predecessor
	For the year ended December 31, 2016																				March 24, 2016 to December 31, 2016			January 1, 2016 to March 23, 2016
	Exelon			Generation			ComEd			PECO			BGE		Pepco		DPL		ACE		PHI			PHI
Other, Net
Decommissioning-related activities:
Net realized income on NDT funds(a)
Regulatory agreement units	$	237		$	237		$	—		$	—		$	—	$	—	$	—	$	—	$	—		$	—
Non-regulatory agreement units	126			126			—			—			—		—		—		—		—			—
Net unrealized gains on NDT funds
Regulatory agreement units	216			216			—			—			—		—		—		—		—			—
Non-regulatory agreement units	194			194			—			—			—		—		—		—		—			—
Net unrealized losses on pledged assets
Zion Station decommissioning	(1		)	(1		)	—			—			—		—		—		—		—			—
Regulatory offset to NDT fund-related activities(b)	(372		)	(372		)	—			—			—		—		—		—		—			—
Total decommissioning-related activities	400			400			—			—			—		—		—		—		—			—
Investment income (loss)	17			8			—			(1		)	2		1		—		1		1			—
Long-term lease income	4			—			—			—			—		—		—		—		—			—
Interest income (expense) related to uncertain income tax positions	13			—			—			—			—		1		—		—		(1		)	—
Penalty related to uncertain income tax positions(c)	(106		)	—			(86		)	—			—		—		—		—		—			—
AFUDC—Equity	64			—			14			8			19		19		5		6		23			7
Non-service net periodic benefit cost	(116		)	—			—			—			—		—		—		—		—			—
Loss on debt extinguishment	(3		)	(2		)	—			—			—		—		—		—		—			—
Other	24			(5		)	7			1			—		15		8		2		21			(11		)
Other, net	$	297		$	401		$	(65	)	$	8		$	21	$	36	$	13	$	9	$	44		$	(4	)

__________

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

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

(c) See Note 14—Income Taxes for additional information on the penalty related to the Tax Court’s decision on Exelon’s like-kind exchange tax position.

Cash Flow Supplemental Disclosures

The following tables provide additional information regarding the Registrants’ Consolidated Statements of Cash Flows for the years ended December 31, 2018, 2017 and 2016.

	For the year ended December 31, 2018
											Successor
	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Depreciation, amortization and accretion
Property, plant and equipment	$	3,740	$	1,748	$	820	$	274	$	335	$	480	$	218	$	131	$	94
Regulatory assets	555		—		120		27		148		260		167		51		42
Amortization of intangible assets, net	58		49		—		—		—		—		—		—		—
Amortization of energy contract assets and liabilities(a)	14		14		—		—		—		—		—		—		—
Nuclear fuel(b)	1,115		1,115		—		—		—		—		—		—		—
ARO accretion(c)	489		489		—		—		—		—		—		—		—
Total depreciation, amortization and accretion	$	5,971	$	3,415	$	940	$	301	$	483	$	740	$	385	$	182	$	136

	For the year ended December 31, 2017
											Successor
	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Depreciation, amortization and accretion
Property, plant and equipment	$	3,293	$	1,409	$	777	$	261	$	312	$	457	$	203	$	124	$	89
Regulatory assets	478		—		73		25		161		218		118		43		57
Amortization of intangible assets, net	57		48		—		—		—		—		—		—		—
Amortization of energy contract assets and liabilities(a)	35		35		—		—		—		—		—		—		—
Nuclear fuel(b)	1,096		1,096		—		—		—		—		—		—		—
ARO accretion(c)	468		468		—		—		—		—		—		—		—
Total depreciation, amortization and accretion	$	5,427	$	3,056	$	850	$	286	$	473	$	675	$	321	$	167	$	146

																	Successor		Predecessor
	For the year ended December 31, 2016																March 24, 2016 to December 31, 2016		January 1, 2016 to March 23, 2016
	Exelon		Generation		ComEd		PECO		BGE		Pepco		DPL		ACE		PHI		PHI
Depreciation, amortization and accretion
Property, plant and equipment	$	3,477	$	1,835	$	708	$	244	$	299	$	175	$	110	$	82	$	325	$	94
Regulatory assets	407		—		67		26		124		120		47		83		190		58
Amortization of intangible assets, net	52		44		—		—		—		—		—		—		—		—
Amortization of energy contract assets and liabilities(a)	35		35		—		—		—		—		—		—		—		—
Nuclear fuel(b)	1,159		1,159		—		—		—		—		—		—		—		—
ARO accretion(c)	446		446		—		—		—		—		—		—		—		—
Total depreciation, amortization and accretion	$	5,576	$	3,519	$	775	$	270	$	423	$	295	$	157	$	165	$	515	$	152

__________

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

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

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

	For the year ended December 31, 2018
																Successor
	Exelon			Generation			ComEd			PECO			BGE			PHI			Pepco			DPL			ACE
Cash paid (refunded) during the year:
Interest (net of amount capitalized)	$	1,421		$	369		$	332		$	125		$	94		$	250		$	123		$	56		$	61
Income taxes (net of refunds)	95			746			(153		)	(2		)	14			(32		)	41			(6		)	(12		)
Other non-cash operating activities:
Pension and non-pension postretirement benefit costs	$	583		$	204		$	177		$	18		$	59		$	67		$	15		$	6		$	12
Loss (gain) from equity method investments	28			30			—			—			—			(1		)	—			—			—
Provision for uncollectible accounts	159			48			40			33			10			28			11			6			11
Provision for excess and obsolete inventory	24			20			3			—			—			—			—			—			—
Stock-based compensation costs	75			—			—			—			—			—			—			—			—
Other decommissioning-related activity(a)	(2		)	(2		)	—			—			—			—			—			—			—
Energy-related options(b)	10			10			—			—			—			—			—			—			—
Amortization of regulatory asset related to debt costs	8			—			3			1			—			4			2			1			1
Amortization of rate stabilization deferral	14			—			—			—			—			14			14			—			—
Amortization of debt fair value adjustment	(15		)	(12		)	—			—			—			(3		)	—			—			—
Merger-related commitments(c)	—			—			—			—			—			5			—			5			—
Severance costs	35			9			—			—			—			—			—			—			—
Asset retirement costs	20			—			—			—			—			20			22			(1		)	(1		)
Amortization of debt costs	36			14			5			2			1			3			2			—			1
Discrete impacts from EIMA and FEJA(d)	28			—			28			—			—			—			—			—			—
Long-term incentive plan	140			—			—			—			—			—			—			—			—
Other	(19		)	(23		)	(14		)	(3		)	(12		)	6			(6		)	7			—
Total other non-cash operating activities	$	1,124		$	298		$	242		$	51		$	58		$	143		$	60		$	24		$	24
Non-cash investing and financing activities:
Change in capital expenditures not paid	$	(69	)	$	(199	)	$	11		$	(12	)	$	50		$	93		$	20		$	22		$	46
Change in PPE related to ARO update	(107		)	(130		)	7			—			1			15			12			2			1
Dividends on stock compensation	6			—			—			—			—			—			—			—			—
Acquisition of land	3			—			—			—			—			3			—			—			3

__________ 

(a) Includes the elimination of decommissioning-related activities 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 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 to results of operations.

(c) See Note 5 - Mergers, Acquisitions and Dispositions for additional information.

(d) Reflects the change in ComEd's distribution and energy efficiency formula rates. See Note 4 — Regulatory Matters for additional information.

	For the year ended December 31, 2017
																Successor
	Exelon			Generation			ComEd			PECO			BGE			PHI			Pepco			DPL			ACE
Cash paid (refunded) during the year:
Interest (net of amount capitalized)	$	2,430		$	391		$	307		$	103		$	96		$	236		$	114		$	49		$	59
Income taxes (net of refunds)	540			337			83			47			(2		)	(144		)	(104		)	(49		)	(2		)
Other non-cash operating activities:
Pension and non-pension postretirement benefit costs	$	643		$	227		$	176		$	29		$	62		$	94		$	25		$	13		$	13
Loss (gain) from equity method investments	32			33			—			—			—			(1		)	—			—			—
Provision for uncollectible accounts	125			38			34			26			8			19			8			3			8
Provision for excess and obsolete inventory	56			51			3			—			—			2			1			1			—
Stock-based compensation costs	88			—			—			—			—			—			—			—			—
Other decommissioning-related activity(a)	(313		)	(313		)	—			—			—			—			—			—			—
Energy-related options(b)	7			7			—			—			—			—			—			—			—
Amortization of regulatory asset related to debt costs	9			—			4			1			—			4			2			1			1
Amortization of rate stabilization deferral	(10		)	—			—			—			7			(17		)	(17		)	—			—
Amortization of debt fair value adjustment	(18		)	(12		)	—			—			—			(6		)	—			—			—
Merger-related commitments(c)	—			—			—			—			—			(8		)	(6		)	(2		)	—
Severance costs	35			31			—			—			—			3			—			—			—
Amortization of debt costs	64			37			5			2			2			4			2			—			1
Discrete impacts from EIMA and FEJA(d)	(52		)	—			(52		)	—			—			—			—			—			—
Vacation accrual adjustment(e)	(68		)	(35		)	(12		)	—			—			(8		)	(8		)	—			—
Long-term incentive plan	109			—			—			—			—			—			—			—			—
Change in environmental liabilities	44			44			—			—			—			—			—			—			—
Other	(30		)	4			6			(4		)	(14		)	(28		)	(13		)	(7		)	(6		)
Total other non-cash operating activities	$	721		$	112		$	164		$	54		$	65		$	58		$	(6	)	$	9		$	17
Non-cash investing and financing activities:
Change in capital expenditures not paid	$	42		$	73		$	(61	)	$	22		$	23		$	(12	)	$	5		$	4		$	(13	)
Change in PPE related to ARO update	29			29			—			—			—			—			—			—			—
Non-cash financing of capital projects	16			16			—			—			—			—			—			—			—
Indemnification of like-kind exchange position(f)	—			—			21			—			—			—			—			—			—
Dividends on stock compensation	7			—			—			—			—			—			—			—			—
Dissolution of financing trust due to long-term debt retirement	8			—			—			—			8			—			—			—			—

Fair value adjustment of long-term debt due to retirement	(5	)	—	—	—	—	—	—	—	—
Fair value of pension and OPEB obligation transferred in connection with FitzPatrick	—		33	—	—	—	—	—	—	—

__________ 

(a) Includes the elimination of decommissioning-related activities 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 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 to results of operations.

(c) See Note 5 - Mergers, Acquisitions and Dispositions for additional information.

(d) Reflects the change in ComEd's distribution and energy efficiency formula rates . See Note 4 — Regulatory Matters for additional information.

(e) On December 1, 2017, Exelon adopted a single, standard vacation accrual policy for all non-represented, non-craft (represented and craft policies remained unchanged) employees effective January 1, 2018.  To reflect the new policy, Exelon recorded a one-time, $68 million pre-tax credit to expense to reverse 2018 vacation cost originally accrued throughout 2017 that will now be accrued ratably over the year in 2018.

(f) See Note 14 — Income Taxes for additional information on the like-kind exchange tax position.

																					Successor			Predecessor
	For the year ended December 31, 2016																				March 24, 2016 to December 31, 2016			January 1, 2016 to March 23, 2016
	Exelon			Generation			ComEd			PECO		BGE		Pepco			DPL		ACE		PHI			PHI
Cash paid (refunded) during the year:
Interest (net of amount capitalized)	$	1,340		$	339		$	298		$	104	$	92	$	118		$	47	$	62	$	209		$	43
Income taxes (net of refunds)	(441		)	435			(444		)	64		31		216			115		200		258			11
Other non-cash operating activities:
Pension and non-pension postretirement benefit costs	$	619		$	218		$	166		$	33	$	67	$	31		$	18	$	15	$	86		$	23
Loss from equity method investments	24			25			—			—		—		—			—		—		—			—
Provision for uncollectible accounts	155			19			41			30		1		29			23		32		65			16
Stock-based compensation costs	111			—			—			—		—		—			—		—		—			3
Other decommissioning-related activity(a)	(384		)	(384		)	—			—		—		—			—		—		—			—
Energy-related options(b)	(11		)	(11		)	—			—		—		—			—		—		—			—
Amortization of regulatory asset related to debt costs	9			—			4			1		—		2			1		1		3			1
Amortization of rate stabilization deferral	76			—			—			—		81		(12		)	2		—		(5		)	5
Amortization of debt fair value adjustment	(11		)	(11		)	—			—		—		—			—		—		—			—
Merger-related commitments(c)(d)	558			53			—			—		—		125			82		110		317			—
Severance costs	99			22			—			—		—		—			—		—		56			—
Discrete impacts from EIMA(e)	8			—			8			—		—		—			—		—		—			—
Amortization of debt costs	35			17			4			3		1		—			—		—		1			—

Provision for excess and obsolete inventory	12			6			4			—			—			3			1			1			1			1
Lower of cost or market inventory adjustment	37			36			—			1			—			—			—			—			—			—
Baltimore City Conduit Lease Settlement	(28		)	—			—			—			(28		)	—			—			—			—			—
Cash Working Capital Order	(13		)	—			—			—			(13		)	—			—			—			—			—
Asset retirement costs	2			—			—			—			—			—			1			2			2			—
Long-term incentive plan	70			—			—			—			—			—			—			—			—			—
Other	(35		)	25			(12		)	(3		)	(21		)	(3		)	(14		)	(6		)	(11		)	(3		)
Total other non-cash operating activities	$	1,333		$	15		$	215		$	65		$	88		$	175		$	114		$	155		$	515		$	46
Non-cash investing and financing activities:
Change in capital expenditures not paid	$	(128	)	$	50		$	(91	)	$	(11	)	$	(86	)	$	27		$	(12	)	$	11		$	21		$	11
Change in PPE related to ARO update	191			191			—			—			—			—			—			—			—			—
Indemnification of like-kind exchange position(g)	—			—			158			—			—			—			—			—			—			—
Dividends on stock compensation	6			—			—			—			—			—			—			—			—			—
Non-cash financing of capital projects	95			95			—			—			—			—			—			—			—			—
Sale of Upstream assets(c)	37			37			—			—			—			—			—			—			—			—
Pending FitzPatrick Acquisition(h)	(54		)	(54		)	—			—			—			—			—			—			—			—
Fair value of net assets contributed to Generation in connection with the PHI merger, net of cash	—			119			—			—			—			—			—			—			—			—
Fair value of net assets distributed to Exelon in connection with the PHI Merger, net of cash(c)(f)	—			—			—			—			—			—			—			—			127			—
Fair value of pension obligation transferred in connection with the PHI Merger, net of cash(c)(f)	—			—			—			—			—			—			—			—			53			—
Assumption of member purchase liability	—			—			—			—			—			—			—			—			29			—
Assumption of merger commitment liability	—			—			—			—			—			33			—			—			33			—

__________

(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 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 to results of operations.

(c) See Note 5 - Mergers, Acquisitions and Dispositions for additional information.

(d) Excludes $5 million of forgiveness of Accounts receivable related to merger commitments recorded in connection with the PHI Merger, the balance is included within Provision for uncollectible accounts.

(e) Reflects the change in distribution rates pursuant to EIMA, which allows for the recovery of costs by a utility through a pre-established performance-based formula rate. See Note 4 — Regulatory Matters for additional information.

(f) Immediately following closing of the PHI Merger, the net assets associated with PHI’s unregulated business interests were distributed by PHI to Exelon. Exelon contributed a portion of such net assets to Generation.

(g) See Note 14 — Income Taxes for additional information on the like-kind exchange tax position.

(h) Reflects the transfer of nuclear fuel to Entergy under the cost reimbursement provisions of the FitzPatrick acquisition agreements. See Note 5 - Mergers, Acquisitions and Dispositions for additional information.

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.

											Successor
December 31, 2018	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Cash and cash equivalents	$	1,349	$	750	$	135	$	130	$	7	$	124	$	16	$	23	$	7
Restricted cash	247		153		29		5		6		43		37		1		4
Restricted cash included in other long-term assets	185		—		166		—		—		19		—		—		19
Total cash, cash equivalents and restricted cash	$	1,781	$	903	$	330	$	135	$	13	$	186	$	53	$	24	$	30

											Successor
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

																	Successor		Predecessor
	December 31, 2016																December 31, 2016		March 23, 2016
	Exelon		Generation		ComEd		PECO		BGE		Pepco		DPL		ACE		PHI		PHI
Cash and cash equivalents	$	635	$	290	$	56	$	63	$	23	$	9	$	46	$	101	$	170	$	319
Restricted cash	253		158		2		4		24		33		—		9		43		11
Restricted cash included in other long-term assets	26		—		—		—		3		—		—		23		23		18
Total cash, cash equivalents and restricted cash	$	914	$	448	$	58	$	67	$	50	$	42	$	46	$	133	$	236	$	348

											Predecessor
December 31, 2015	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Cash and cash equivalents	$	6,502	$	431	$	67	$	295	$	9	$	26	$	5	$	5	$	3
Restricted cash	205		123		2		3		24		14		2		—		12
Restricted cash included in other long-term assets	5		2		—		—		3		18		—		—		18
Total cash, cash equivalents and restricted cash	$	6,712	$	556	$	69	$	298	$	36	$	58	$	7	$	5	$	33

Supplemental Balance Sheet Disclosures [Text Block]

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

December 31, 2018	Exelon			Generation			ComEd			PECO			BGE			PHI			Pepco			DPL			ACE
Unbilled customer revenues(a)	$	1,656		$	965		$	223		$	114		$	168		$	186		$	97		$	59		$	30
Allowance for uncollectible accounts (b)	(319		)	(104		)	(81		)	(61		)	(20		)	(53		)	(21		)	(13		)	(19		)

December 31, 2017	Exelon			Generation			ComEd			PECO			BGE			PHI			Pepco			DPL			ACE
Unbilled customer revenues(a)	$	1,858		$	1,017		$	242		$	162		$	205		$	232		$	133		$	68		$	31
Allowance for uncollectible accounts(b)	(322		)	(114		)	(73		)	(56		)	(24		)	(55		)	(21		)	(16		)	(18		)

__________

(a) Represents unbilled portion of receivables estimated under Exelon’s unbilled critical accounting policy.

(b) Includes the estimated allowance for uncollectible accounts on billed customer and other accounts receivable.

The Utility Registrants are required, under separate legislation and regulations in Illinois, Pennsylvania, Maryland, District of Columbia and New Jersey, to purchase certain receivables from alternative retail electric and, as applicable, natural gas suppliers that participate in the utilities' consolidated billing. ComEd, BGE, Pepco and DPL purchase receivables at a discount to recover primarily uncollectible accounts expense from the suppliers. PECO and ACE purchase receivables at face value and recover uncollectible accounts expense, including those from alternative retail electric and natural gas supplies, through base distribution rates and a rate rider, respectively. Exelon and the Utility Registrants do not record unbilled commodity receivables under their POR programs. Purchased billed receivables are recorded on a net basis in Exelon’s and the Utility Registrant's Consolidated Statements of Operations and Comprehensive Income and are classified in Other accounts receivable, net in their Consolidated Balance Sheets. The following tables provide information about the purchased receivables of those companies as of December 31, 2018 and 2017.

December 31, 2018	Exelon			ComEd			PECO			BGE			PHI			Pepco			DPL			ACE
Purchased receivables	$	313		$	94		$	74		$	61		$	84		$	57		$	8		$	19
Allowance for uncollectible accounts(a)	(34		)	(17		)	(5		)	(3		)	(9		)	(5		)	(1		)	(3		)
Purchased receivables, net	$	279		$	77		$	69		$	58		$	75		$	52		$	7		$	16

December 31, 2017	Exelon			ComEd			PECO			BGE			PHI			Pepco			DPL			ACE
Purchased receivables	$	298		$	87		$	70		$	58		$	83		$	56		$	9		$	18
Allowance for uncollectible accounts(a)	(31		)	(14		)	(5		)	(3		)	(9		)	(5		)	(1		)	(3		)
Purchased receivables, net	$	267		$	73		$	65		$	55		$	74		$	51		$	8		$	15

__________

(a) For ComEd, BGE, Pepco and DPL, reflects the incremental allowance for uncollectible accounts recorded, which is in addition to the purchase discount. For ComEd, the incremental uncollectible accounts expense is recovered through a rate rider. BGE, Pepco and DPL recover actual write-offs which are reflected in the POR discount rate.

The following tables provide additional information about Registrants' investments at December 31, 2018 and 2017.

December 31, 2018	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Investments
Equity method investments:
Financing trusts(a)	$	14	$	—	$	6	$	8	$	—	$	—	$	—	$	—	$	—
Bloom	180		180		—		—		—		—		—		—		—
NET Power	70		70		—		—		—		—		—		—		—
Other equity method investments	3		1		—		—		—		—		—		—		—
Total equity method investments	267		251		6		8		—		—		—		—		—
Other investments:
Employee benefit trusts and investments(b)	244		49		—		17		5		130		105		—		—
Equity investments without readily determinable fair values	72		72		—		—		—		—		—		—		—
Other available for sale debt security investments	40		40		—		—		—		—		—		—		—
Other	2		2		—		—		—		—		—		—		—
Total investments	$	625	$	414	$	6	$	25	$	5	$	130	$	105	$	—	$	—

December 31, 2017	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Investments
Equity method investments:
Financing trusts(a)	$	14	$	—	$	6	$	8	$	—	$	—	$	—	$	—	$	—
Bloom	206		206		—		—		—		—		—		—		—
NET Power	76		76		—		—		—		—		—		—		—
Other equity method investments	1		1		—		—		—		—		—		—		—
Total equity method investments	297		283		6		8		—		—		—		—		—
Other investments:
Employee benefit trusts and investments(b)	244		51		—		17		5		132		102		—		—
Equity investments without readily determinable fair values	62		62		—		—		—		—		—		—		—
Other available for sale debt security investments	37		37		—		—		—		—		—		—		—
Total investments	$	640	$	433	$	6	$	25	$	5	$	132	$	102	$	—	$	—

__________

(a) Includes investments in affiliated financing trusts, which were not consolidated within the financial statements of Exelon and are shown as investments in the Consolidated Balance Sheets. See Note 1 — Significant Accounting Policies for additional information.

(b) The Registrants’ debt and equity security investments are recorded at fair market value.

The following tables provide additional information about liabilities of the Registrants at December 31, 2018 and 2017.

December 31, 2018	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Accrued expenses
Compensation-related accruals(a)	$	1,191	$	479	$	187	$	49	$	68	$	99	$	29	$	19	$	12
Taxes accrued	412		226		71		28		46		74		58		4		5
Interest accrued	334		77		105		33		39		50		25		8		12
Severance accrued	44		26		2		—		—		5		—		—		—
Other accrued expenses	131		90		8		3		2		28		14		8		6
Total accrued expenses	$	2,112	$	898	$	373	$	113	$	155	$	256	$	126	$	39	$	35
December 31, 2017	Exelon		Generation		ComEd		PECO		BGE		PHI		Pepco		DPL		ACE
Accrued expenses
Compensation-related accruals(a)	$	978	$	407	$	158	$	64	$	58	$	106	$	29	$	17	$	11
Taxes accrued	373		444		60		15		71		61		68		4		5
Interest accrued	328		78		102		33		34		48		23		8		12
Severance accrued	58		30		2		—		—		17		—		—		—
Other accrued expenses	100		63		5		2		1		29		17		6		5
Total accrued expenses	$	1,837	$	1,022	$	327	$	114	$	164	$	261	$	137	$	35	$	33

__________

(a) Primarily includes accrued payroll, bonuses and other incentives, vacation and benefits.