Schedule II - Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2017

Valuation and Qualifying Accounts [Abstract]

Valuation and Qualifying Accounts

Exelon Corporation and Subsidiary Companies

Schedule II – Valuation and Qualifying Accounts

Column A	Column B		Column C						Column D			Column E
			Additions and adjustments
Description	Balance at Beginning of Period		Charged to Costs and Expenses		Charged to Other Accounts				Deductions			Balance at End of Period
	(in millions)
For the year ended December 31, 2017
Allowance for uncollectible accounts(a)	$	334	$	126	$	27		(c)	$	165	(d)	$	322
Deferred tax valuation allowance	20		—		17				—			37
Reserve for obsolete materials	113		56		10				5			174
For the year ended December 31, 2016
Allowance for uncollectible accounts(a)	$	284	$	162	$	99		(b)(c)	$	211	(d)	$	334
Deferred tax valuation allowance	13		—		10			(b)	3			20
Reserve for obsolete materials	105		12		1			(b)	5			113
For the year ended December 31, 2015
Allowance for uncollectible accounts(a)	$	311	$	113	$	27		(c)	$	167	(d)	$	284
Deferred tax valuation allowance	50		—		(27		)		10			13
Reserve for obsolete materials	95		10		2				2			105

__________

(a) Excludes the non-current allowance for uncollectible accounts related to PECO’s installment plan receivables of $15 million, $23 million, and $8 million for the years ended December 31, 2017, 2016, and 2015, respectively.

(b) Primarily represents the addition of PHI's results as of March 23, 2016, the date of the merger

(c) Includes charges for late payments and non-service receivables.

(d) Write-off of individual accounts receivable.

Exelon Generation Company, LLC and Subsidiary Companies

Generation

1.	Financial Statements:
	Report of Independent Registered Public Accounting Firm dated February 9, 2018 of PricewaterhouseCoopers LLP
	Consolidated Statements of Operations and Comprehensive Income for the Years Ended December 31, 2017, 2016 and 2015
	Consolidated Statements of Cash Flows for the Years Ended December 31, 2017, 2016 and 2015
	Consolidated Balance Sheets at December 31, 2017 and 2016
	Consolidated Statements of Changes in Equity for the Years Ended December 31, 2017, 2016 and 2015
	Notes to Consolidated Financial Statements
2.	Financial Statement Schedules:
	Schedule II – Valuation and Qualifying Accounts
	Schedules not included are omitted because of the absence of conditions under which they are required or because the required information is provided in the consolidated financial statements, including the notes thereto

Exelon Generation Company, LLC and Subsidiary Companies

Schedule II – Valuation and Qualifying Accounts

Column A	Column B		Column C					Column D		Column E
			Additions and adjustments
Description	Balance at Beginning of Period		Charged to Costs and Expenses		Charged to Other Accounts			Deductions		Balance at End of Period
	(in millions)
For the year ended December 31, 2017
Allowance for uncollectible accounts	$	91	$	34	$	—		$	11	$	114
Deferred tax valuation allowance	9		—		14			—		23
Reserve for obsolete materials	106		51		9			—		166
For the year ended December 31, 2016
Allowance for uncollectible accounts	$	77	$	19	$	3		$	8	$	91
Deferred tax valuation allowance	11		—		—			2		9
Reserve for obsolete materials	102		6		—			2		106
For the year ended December 31, 2015
Allowance for uncollectible accounts	$	60	$	22	$	—		$	5	$	77
Deferred tax valuation allowance	48		—		(27		)	10		11
Reserve for obsolete materials	93		9		—			—		102

Commonwealth Edison Company and Subsidiary Companies

ComEd

1.	Financial Statements:
	Report of Independent Registered Public Accounting Firm dated February 9, 2018 of PricewaterhouseCoopers LLP
	Consolidated Statements of Operations and Comprehensive Income for the Years Ended December 31, 2017, 2016 and 2015
	Consolidated Statements of Cash Flows for the Years Ended December 31, 2017, 2016 and 2015
	Consolidated Balance Sheets at December 31, 2017 and 2016
	Consolidated Statements of Changes in Shareholders’ Equity for the Years Ended December 31, 2017, 2016 and 2015
	Notes to Consolidated Financial Statements
2.	Financial Statement Schedules:
	Schedule II – Valuation and Qualifying Accounts
	Schedules not included are omitted because of the absence of conditions under which they are required or because the required information is provided in the consolidated financial statements, including the notes thereto

Commonwealth Edison Company and Subsidiary Companies

Schedule II – Valuation and Qualifying Accounts

Column A	Column B		Column C					Column D			Column E
			Additions and adjustments
Description	Balance at Beginning of Period		Charged to Costs and Expenses		Charged to Other Accounts			Deductions			Balance at End of Period
	(in millions)
For the year ended December 31, 2017
Allowance for uncollectible accounts	$	70	$	39	$	20	(a)	$	56	(b)	$	73
Reserve for obsolete materials	4		3		1			3			5
For the year ended December 31, 2016
Allowance for uncollectible accounts	$	75	$	45	$	23	(a)	$	73	(b)	$	70
Reserve for obsolete materials	3		4		1			4			4
For the year ended December 31, 2015
Allowance for uncollectible accounts	$	84	$	39	$	18	(a)	$	66	(b)	$	75
Reserve for obsolete materials	2		1		2			2			3

__________

(a) Primarily charges for late payments and non-service receivables.

(b) Write-off of individual accounts receivable.

PECO Energy Company and Subsidiary Companies

PECO

1.	Financial Statements:
	Report of Independent Registered Public Accounting Firm dated February 9, 2018 of PricewaterhouseCoopers LLP
	Consolidated Statements of Operations and Comprehensive Income for the Years Ended December 31, 2017, 2016 and 2015
	Consolidated Statements of Cash Flows for the Years Ended December 31, 2017, 2016 and 2015
	Consolidated Balance Sheets at December 31, 2017 and 2016
	Consolidated Statements of Changes in Shareholder's Equity for the Years Ended December 31, 2017, 2016 and 2015
	Notes to Consolidated Financial Statements
2.	Financial Statement Schedules:
	Schedule II – Valuation and Qualifying Accounts
	Schedules not included are omitted because of the absence of conditions under which they are required or because the required information is provided in the consolidated financial statements, including the notes thereto

PECO Energy Company and Subsidiary Companies

Schedule II – Valuation and Qualifying Accounts

Column A	Column B		Column C					Column D			Column E
			Additions and adjustments
Description	Balance at Beginning of Period		Charged to Costs and Expenses		Charged to Other Accounts			Deductions			Balance at End of Period
	(in millions)
For the year ended December 31, 2017
Allowance for uncollectible accounts(a)	$	61	$	26	$	4	(b)	$	35	(c)	$	56
Reserve for obsolete materials	2		—		—			—			2
For the year ended December 31, 2016
Allowance for uncollectible accounts(a)	$	83	$	32	$	7	(b)	$	61	(c)	$	61
Reserve for obsolete materials	1		1		—			—			2
For the year ended December 31, 2015
Allowance for uncollectible accounts(a)	$	100	$	37	$	9	(b)	$	63	(c)	$	83
Reserve for obsolete materials	1		—		—			—			1

__________

(a) Excludes the non-current allowance for uncollectible accounts related to PECO’s installment plan receivables of $15 million, $23 million, and $8 million for the years ended December 31, 2017, 2016, and 2015, respectively.

(b) Primarily charges for late payments.

(c) Write-off of individual accounts receivable.

Baltimore Gas and Electric Company and Subsidiary Companies

BGE

1.	Financial Statements:
	Report of Independent Registered Public Accounting Firm dated February 9, 2018 of PricewaterhouseCoopers LLP
	Consolidated Statements of Operations and Comprehensive Income for the Years Ended December 31, 2017, 2016 and 2015
	Consolidated Statements of Cash Flows for the Years Ended December 31, 2017, 2016 and 2015
	Consolidated Balance Sheets at December 31, 2017 and 2016
	Consolidated Statements of Changes in Shareholder's Equity for the Years Ended December 31, 2017, 2016 and 2015
	Notes to Consolidated Financial Statements
2.	Financial Statement Schedules:
	Schedule II – Valuation and Qualifying Accounts
	Schedules not included are omitted because of the absence of conditions under which they are required or because the required information is provided in the consolidated financial statements, including the notes thereto

Baltimore Gas and Electric Company and Subsidiary Companies

Schedule II – Valuation and Qualifying Accounts

Column A	Column B		Column C					Column D			Column E
			Additions and adjustments
Description	Balance at Beginning of Period		Charged to Costs and Expenses		Charged to Other Accounts			Deductions			Balance at End of Period
	(in millions)
For the year ended December 31, 2017
Allowance for uncollectible accounts	$	32	$	8	$	(3	)	$	13	(a)	$	24
Deferred tax valuation allowance	1		—		—			—			1
Reserve for obsolete materials	—		—		—			—			—
For the year ended December 31, 2016
Allowance for uncollectible accounts	$	49	$	1	$	9		$	27	(a)	$	32
Deferred tax valuation allowance	1		—		—			—			1
Reserve for obsolete materials	—		—		—			—			—
For the year ended December 31, 2015
Allowance for uncollectible accounts	$	67	$	15	$	—		$	33	(a)	$	49
Deferred tax valuation allowance	1		—		—			—			1
Reserve for obsolete materials	—		—		—			—			—

__________

(a) Write-off of individual accounts receivable.

Pepco Holdings LLC and Subsidiary Companies

PHI

1.	Successor Company Financial Statements:
	Report of Independent Registered Public Accounting Firm dated February 9, 2018 of PricewaterhouseCoopers LLP
	Consolidated Statements of Operations and Comprehensive Income (Loss) for the Year Ended December 31, 2017 and for the Period March 24, 2016 to December 31, 2016
	Consolidated Statements of Cash Flows for the Year Ended December 31, 2017 and for the Period March 24, 2016 to December 31, 2016
	Consolidated Balance Sheets at December 31, 2017 and 2016
	Consolidated Statements of Changes in Equity for the Year Ended December 31, 2017 and for the Period March 24, 2016 to December 31, 2016
	Notes to Consolidated Financial Statements
	Predecessor Company Financial Statements:
	Report of Independent Registered Public Accounting Firm dated February 13, 2017 of PricewaterhouseCoopers LLP
	Consolidated Statements of Operations and Comprehensive Income (Loss) for the Period January 1, 2016 to March 23, 2016 and the Year Ended December 31, 2015
	Consolidated Statements of Cash Flows for the Period January 1, 2016 to March 23, 2016 and for the Year Ended December 31, 2015
	Consolidated Statements of Changes in Equity for the Period January 1, 2016 to March 23, 2016 and for the Year Ended December 31, 2015
	Notes to Consolidated Financial Statements
2.	Successor Financial Statement Schedules:
	Schedule II – Valuation and Qualifying Accounts - For the Year Ended December 31, 2017 and the Period March 24, 2016 to December 31, 2016
	Predecessor Financial Statement Schedules:
	Schedule II – Valuation and Qualifying Accounts - For the Period January 1, 2016 to March 23, 2016 and For the Year Ended December 31, 2015
	Schedules not included are omitted because of the absence of conditions under which they are required or because the required information is provided in the consolidated financial statements, including the notes thereto

Pepco Holdings LLC and Subsidiary Companies

Schedule II – Valuation and Qualifying Accounts

Column A	Column B		Column C						Column D				Column E
			Additions and adjustments
Description	Balance at Beginning of Period		Charged to Costs and Expenses		Charged to Other Accounts				Deductions				Balance at End of Period
	(in millions)
For the Year Ended December 31, 2017(Successor)
Allowance for uncollectible accounts	$	80	$	19	$	6		(a)	$	50		(b)	$	55
Deferred tax valuation allowance	10		—		3				—				13
Reserve for obsolete materials	2		2		—				2				2
March 24, 2016 to December 31, 2016(Successor)
Allowance for uncollectible accounts	$	52	$	65	$	5		(a)	$	42		(b)	$	80
Deferred tax valuation allowance	63		—		(53		)		—				10
Reserve for obsolete materials	—		1		—				(1		)		2
January 1, 2016 to March 23, 2016 (Predecessor)
Allowance for uncollectible accounts	$	56	$	16	$	2		(a)	$	22		(b)	$	52
Deferred tax valuation allowance	63		—		—				—				63
Reserve for obsolete materials	—		—		—				—				—
For the Year Ended December 31, 2015 (Predecessor)
Allowance for uncollectible accounts	$	40	$	59	$	5		(a)	$	48		(b)	$	56
Deferred tax valuation allowance	61		—		2				—				63
Reserve for obsolete materials	—		—		—				—				—

__________

(a) Primarily charges for late payments.

(b) Write-off of individual accounts receivable.

Potomac Electric Power Company

Pepco

1.	Financial Statements:
	Report of Independent Registered Public Accounting Firm dated February 9, 2018 of PricewaterhouseCoopers LLP
	Statements of Operations and Comprehensive Income for the Years Ended December 31, 2017, 2016 and 2015
	Statements of Cash Flows for the Years Ended December 31, 2017, 2016 and 2015
	Balance Sheets at December 31, 2017 and 2016
	Statements of Changes in Shareholder's Equity for the Years Ended December 31, 2017, 2016 and 2015
	Notes to Consolidated Financial Statements
2.	Financial Statement Schedules:
	Schedule II – Valuation and Qualifying Accounts
	Schedules not included are omitted because of the absence of conditions under which they are required or because the required information is provided in the consolidated financial statements, including the notes thereto

Potomac Electric Power Company

Schedule II – Valuation and Qualifying Accounts

Column A	Column B		Column C					Column D			Column E
			Additions and adjustments
Description	Balance at Beginning of Period		Charged to Costs and Expenses		Charged to Other Accounts			Deductions			Balance at End of Period
	(in millions)
For the year ended December 31, 2017
Allowance for uncollectible accounts	$	29	$	8	$	2	(a)	$	18	(b)	$	21
Deferred tax valuation allowance	—		—		—			—			—
Reserve for obsolete materials	1		1		—			1			1
For the year ended December 31, 2016
Allowance for uncollectible accounts	$	17	$	29	$	3	(a)	$	20	(b)	$	29
Deferred tax valuation allowance	—		—		—			—			—
Reserve for obsolete materials	—		3		—			2			1
For the year ended December 31, 2015
Allowance for uncollectible accounts	$	16	$	20	$	1	(a)	$	20	(b)	$	17
Deferred tax valuation allowance	—		—		—			—			—
Reserve for obsolete materials	—		—		—			—			—

__________

(a) Primarily charges for late payments.

(b) Write-off of individual accounts receivable.

Delmarva Power & Light Company

DPL

1.	Financial Statements:
	Report of Independent Registered Public Accounting Firm dated February 9, 2018 of PricewaterhouseCoopers LLP
	Statements of Operations and Comprehensive Income (Loss) for the Years Ended December 31, 2017, 2016 and 2015
	Statements of Cash Flows for the Years Ended December 31, 2017, 2016 and 2015
	Balance Sheets at December 31, 2017 and 2016
	Statements of Changes in Shareholder's Equity for the Years Ended December 31, 2017, 2016 and 2015
	Notes to Consolidated Financial Statements
2.	Financial Statement Schedules:
	Schedule II – Valuation and Qualifying Accounts
	Schedules not included are omitted because of the absence of conditions under which they are required or because the required information is provided in the consolidated financial statements, including the notes thereto

Delmarva Power & Light Company

Schedule II – Valuation and Qualifying Accounts

Column A	Column B		Column C					Column D			Column E
			Additions and adjustments
Description	Balance at Beginning of Period		Charged to Costs and Expenses		Charged to Other Accounts			Deductions			Balance at End of Period
	(in millions)
For the year ended December 31, 2017
Allowance for uncollectible accounts	$	24	$	3	$	2	(a)	$	13	(b)	$	16
Deferred tax valuation allowance	—		—		—			—			—
Reserve for obsolete materials	—		1		—			1			—
For the year ended December 31, 2016
Allowance for uncollectible accounts	$	17	$	23	$	2	(a)	$	18	(b)	$	24
Deferred tax valuation allowance	—		—		—			—			—
Reserve for obsolete materials	—		1		—			1			—
For the year ended December 31, 2015
Allowance for uncollectible accounts	$	11	$	20	$	2	(a)	$	16	(b)	$	17
Deferred tax valuation allowance	—		—		—			—			—
Reserve for obsolete materials	—		—		—			—			—

__________

(a) Primarily charges for late payments.

(b) Write-off of individual accounts receivable.

Atlantic City Electric Company and Subsidiary Company

ACE

1.	Financial Statements:
	Report of Independent Registered Public Accounting Firm dated February 9, 2018 of PricewaterhouseCoopers LLP
	Consolidated Statements of Operations and Comprehensive Income (Loss) for the Years Ended December 31, 2017, 2016 and 2015
	Consolidated Statements of Cash Flows for the Years Ended December 31, 2017, 2016 and 2015
	Consolidated Balance Sheets at December 31, 2017 and 2016
	Consolidated Statements of Changes in Shareholder's Equity for the Years Ended December 31, 2017, 2016 and 2015
	Notes to Consolidated Financial Statements
2.	Financial Statement Schedules:
	Schedule II – Valuation and Qualifying Accounts
	Schedules not included are omitted because of the absence of conditions under which they are required or because the required information is provided in the consolidated financial statements, including the notes thereto

Atlantic City Electric Company and Subsidiary Company

Schedule II – Valuation and Qualifying Accounts

Column A	Column B		Column C					Column D			Column E
			Additions and adjustments
Description	Balance at Beginning of Period		Charged to Costs and Expenses		Charged to Other Accounts			Deductions			Balance at End of Period
	(in millions)
For the year ended December 31, 2017
Allowance for uncollectible accounts	$	27	$	8	$	2	(a)	$	19	(b)	$	18
Deferred tax valuation allowance	—		—		—			—			—
Reserve for obsolete materials	1		—		—			—			1
For the year ended December 31, 2016
Allowance for uncollectible accounts	$	17	$	32	$	2	(a)	$	24	(b)	$	27
Deferred tax valuation allowance	—		—		—			—			—
Reserve for obsolete materials	—		1		—			—			1
For the year ended December 31, 2015
Allowance for uncollectible accounts	$	9	$	18	$	2	(a)	$	12	(b)	$	17
Deferred tax valuation allowance	—		—		—			—			—
Reserve for obsolete materials	—		—		—			—			—

__________

(a) Primarily charges for late payments.

(b) Write-off of individual accounts receivable.