10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

þ Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the quarterly period ended June 30, 2015

OR

¨ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Commission File Number	Exact name of registrant as specified in its charter and principal office address and telephone number	State of Incorporation	I.R.S. Employer Identification No.
1-16163	WGL Holdings, Inc. 101 Constitution Ave., N.W. Washington, D.C. 20080 (703) 750-2000	Virginia	52-2210912
0-49807	Washington Gas Light Company 101 Constitution Ave., N.W. Washington, D.C. 20080 (703) 750-4440	District of Columbia and Virginia	53-0162882

Indicate by check mark whether each registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrants were required to file such reports) and (2) has been subject to such filing requirements for the past 90 days. Yes þ No ¨

Indicate by check mark whether each registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes þ No ¨

Indicate by check mark whether each registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act. (Check one):

WGL Holdings, Inc.:

Large accelerated filer þ	Accelerated filer ¨	Non-accelerated filer ¨	Smaller reporting company ¨
	(Do not check if a smaller reporting company)

Washington Gas Light Company:

Large accelerated filer ¨	Accelerated filer ¨	Non-accelerated filer þ	Smaller reporting company ¨
	(Do not check if a smaller reporting company)

Indicate by check mark whether each registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ¨ No þ

Indicate the number of shares outstanding of each of the issuers’ classes of common stock, as of the latest practicable date.

WGL Holdings, Inc. common stock, no par value, outstanding as of July 31, 2015: 49,728,662 shares.

All of the outstanding shares of common stock ($1 par value) of Washington Gas Light Company were held by WGL Holdings, Inc. as of July 31, 2015.

WGL Holdings, Inc.

Washington Gas Light Company

For the Quarter Ended June 30, 2015

Table of Contents

PART I. Financial Information
Item 1. Financial Statements (Unaudited)
WGL Holdings, Inc.
Condensed Consolidated Balance Sheets	4
Condensed Consolidated Statements of Income	5
Condensed Consolidated Statements of Comprehensive Income	6
Condensed Consolidated Statements of Cash Flows	7
Washington Gas Light Company
Condensed Balance Sheets	8
Condensed Statements of Income	9
Condensed Statements of Comprehensive Income	10
Condensed Statements of Cash Flows	11
Notes to Condensed Consolidated Financial Statements
WGL Holdings, Inc. and Washington Gas Light Company — Combined	12
Item  2. Management’s Discussion and Analysis of Financial Condition and Results of Operations	43
WGL Holdings, Inc.	46
Washington Gas Light Company	75
Item 3. Quantitative and Qualitative Disclosures about Market Risk	80
Item 4. Controls and Procedures	80
PART II. Other Information
Item 1. Legal Proceedings	81
Item 4. Mine Safety Disclosures	81
Item 6. Exhibits	81
Signature	82

(i)

WGL Holdings, Inc.

Washington Gas Light Company

INTRODUCTION

FILING FORMAT

This Quarterly Report on Form 10-Q is a combined report being filed by two separate registrants: WGL Holdings, Inc. (WGL) and Washington Gas Light Company (Washington Gas). WGL is a holding company that owns all of the outstanding common stock of its subsidiaries, including Washington Gas. Except where the content clearly indicates otherwise, any reference in the report to “WGL,” “we,” “us” or “our” is to the holding company or WGL and all of its subsidiaries, including Washington Gas, on a consolidated basis.

Part I—Financial information in this Quarterly Report on Form 10-Q includes separate financial statements (i.e. balance sheets, statements of income and comprehensive income and statements of cash flows) for WGL and Washington Gas. The Notes to Consolidated Financial Statements are presented on a combined basis for both WGL and Washington Gas. The Management’s Discussion and Analysis of Financial Condition and Results of Operations (Management’s Discussion) included under Item 2 is divided into two major sections for WGL and Washington Gas.

SAFE HARBOR FOR FORWARD-LOOKING STATEMENTS

Certain matters discussed in this report, excluding historical information, include forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 with respect to the outlook for earnings, revenues and other future financial business performance or strategies and expectations. Forward-looking statements are typically identified by words such as, but not limited to, “estimates,” “expects,” “anticipates,” “intends,” “believes,” “plans” and similar expressions, or future or conditional terms such as “will,” “should,” “would” and “could.” Forward-looking statements speak only as of today, and the registrants assume no duty to update them. The following factors, among others, could cause actual results to differ materially from forward-looking statements or historical performance:

• the level and rate at which costs and expenses are incurred and the extent to which they are allowed to be recovered from customers through the regulatory process in connection with constructing, operating and maintaining Washington Gas’ distribution system;

• the availability of natural gas supply and interstate pipeline transportation and storage capacity;

• the ability of natural gas producers, pipeline gatherers and natural gas processors to deliver natural gas into interstate pipelines for delivery by those interstate pipelines to the entrance points of Washington Gas’ distribution system;

• changes and developments in economic, competitive, political and regulatory conditions;

• changes in capital and energy commodity market conditions;

• changes in credit ratings of debt securities of WGL or Washington Gas that may affect access to capital or the cost of debt;

• changes in credit market conditions and creditworthiness of customers and suppliers;

• changes in relevant laws and regulations, including tax, environmental, pipeline integrity and employment laws and regulations;

• legislative, regulatory and judicial mandates and decisions affecting business operations and the timing of recovery of costs and expenses;

• the timing and success of business and product development efforts and technological improvements;

• the pace of certain deregulation efforts and the availability of other competitive alternatives to our products and services;

• changes in accounting principles;

• new commodity purchase and sales contracts or financial contracts and modifications in the terms of existing contracts that may materially affect fair value calculations under derivative accounting requirements;

• our ability to manage the outsourcing of several business processes;

• acts of nature;

• terrorist activities and

• other uncertainties.

The outcome of negotiations and discussions that we may hold with other parties from time to time regarding utility and energy-related investments and strategic transactions that are both recurring and non-recurring may also affect future

(ii)

WGL Holdings, Inc.

Washington Gas Light Company

performance. All such factors are difficult to predict accurately and are generally beyond the direct control of the registrants. Accordingly, while we believe that the assumptions are reasonable, we cannot ensure that all expectations and objectives will be realized. Readers are urged to use care and consider the risks, uncertainties and other factors that could affect our business as described in this Quarterly Report on Form 10-Q.

(iii)

WGL Holdings, Inc.

Condensed Consolidated Balance Sheets (Unaudited)

Part I—Financial Information

Item 1—Financial Statements

(In thousands)	June 30, 2015			September 30, 2014
ASSETS
Property, Plant and Equipment
At original cost	$	4,822,149		$	4,582,764
Accumulated depreciation and amortization	(1,295,069		)	(1,268,319		)
Net property, plant and equipment	3,527,080			3,314,445
Current Assets
Cash and cash equivalents	66,051			8,811
Receivables
Accounts receivable	284,833			222,253
Gas costs and other regulatory assets	6,016			3,752
Unbilled revenues	106,672			96,314
Allowance for doubtful accounts	(26,111		)	(23,341		)
Net receivables	371,410			298,978
Materials and supplies—principally at average cost	20,452			23,647
Storage gas	147,506			333,602
Deferred income taxes	31,425			26,664
Prepaid taxes	9,760			66,578
Other prepayments	38,148			34,269
Derivatives	15,743			18,331
Assets held for sale	22,920			—
Other	25,012			24,635
Total current assets	748,427			835,515
Deferred Charges and Other Assets
Regulatory assets
Gas costs	179,392			191,346
Pension and other post-retirement benefits	175,026			192,981
Other	74,571			71,638
Prepaid post-retirement benefits	109,001			96,385
Derivatives	28,342			18,739
Investments in direct financing leases, capital leases	25,826			18,159
Investments in unconsolidated affiliates	121,290			100,528
Other	19,510			16,763
Total deferred charges and other assets	732,958			706,539
Total Assets	$	5,008,465		$	4,856,499
CAPITALIZATION AND LIABILITIES
Capitalization
Common shareholders’ equity	$	1,266,373		$	1,246,576
Washington Gas Light Company preferred stock	28,173			28,173
Long-term debt	950,494			679,228
Total capitalization	2,245,040			1,953,977
Current Liabilities
Current maturities of long-term debt	45,000			20,000
Notes payable	156,000			453,500
Accounts payable and other accrued liabilities	275,615			313,221
Wages payable	18,906			19,995
Accrued interest	13,654			3,488
Dividends declared	23,330			22,449
Customer deposits and advance payments	73,331			68,318
Gas costs and other regulatory liabilities	29,852			22,563
Accrued taxes	35,752			14,133
Derivatives	58,836			48,555
Liabilities held for sale	1,621			—
Other	44,417			34,063
Total current liabilities	776,314			1,020,285
Deferred Credits
Unamortized investment tax credits	125,117			99,351
Deferred income taxes	672,339			660,908
Accrued pensions and benefits	125,741			120,446
Asset retirement obligations	178,783			175,203
Regulatory liabilities
Accrued asset removal costs	340,844			327,388
Other post-retirement benefits	80,965			86,428
Other	18,785			17,588
Derivatives	354,263			294,745
Other	90,274			100,180
Total deferred credits	1,987,111			1,882,237
Commitments and Contingencies (Note 13)
Total Capitalization and Liabilities	$	5,008,465		$	4,856,499

The accompanying notes are an integral part of these statements.

4

WGL Holdings, Inc.

Condensed Consolidated Statements of Income (Unaudited)

Part I—Financial Information

Item 1—Financial Statements (continued)

	Three Months Ended   June 30,						Nine Months Ended   June 30,
(In thousands, except per share data)	2015			2014			2015			2014
OPERATING REVENUES
Utility	$	185,179		$	194,901		$	1,173,396		$	1,283,697
Non-utility	255,994			272,599			1,018,747			1,038,350
Total Operating Revenues	441,173			467,500			2,192,143			2,322,047
OPERATING EXPENSES
Utility cost of gas	59,286			64,448			499,128			710,436
Non-utility cost of energy-related sales	240,808			266,321			933,911			997,958
Operation and maintenance	98,642			89,964			295,309			277,805
Depreciation and amortization	30,696			27,622			90,159			81,516
General taxes and other assessments	29,308			28,634			126,475			126,376
Total Operating Expenses	458,740			476,989			1,944,982			2,194,091
OPERATING INCOME (LOSS)	(17,567		)	(9,489		)	247,161			127,956
Equity in earnings of unconsolidated affiliates	1,262			818			4,238			1,851
Other income (expenses)—net	2,329			(304		)	(1,688		)	257
Interest expense	13,140			9,503			38,704			28,020
INCOME (LOSS) BEFORE INCOME TAXES	(27,116		)	(18,478		)	211,007			102,044
INCOME TAX EXPENSE (BENEFIT)	(11,756		)	(6,868		)	80,364			33,152
NET INCOME (LOSS)	$	(15,360	)	$	(11,610	)	$	130,643		$	68,892
Dividends on Washington Gas Light Company preferred stock	330			330			990			990
NET INCOME (LOSS) APPLICABLE TO COMMON STOCK	$	(15,690	)	$	(11,940	)	$	129,653		$	67,902
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING
Basic	49,729			51,921			49,814			51,871
Diluted	49,729			51,921			50,056			51,885
EARNINGS (LOSS) PER AVERAGE COMMON SHARE
Basic	$	(0.32	)	$	(0.23	)	$	2.60		$	1.31
Diluted	$	(0.32	)	$	(0.23	)	$	2.59		$	1.31
DIVIDENDS DECLARED PER COMMON SHARE	$	0.4625		$	0.4400		$	1.3650		$	1.3000

The accompanying notes are an integral part of these statements.

5

WGL Holdings, Inc.

Condensed Consolidated Statements of Comprehensive Income (Unaudited)

Part I—Financial Information

Item 1—Financial Statements (continued)

	Three Months Ended   June 30,						Nine Months Ended June 30,
(In thousands)	2015			2014			2015			2014
NET INCOME (LOSS)	$	(15,360	)	$	(11,610	)	$	130,643		$	68,892
OTHER COMPREHENSIVE INCOME (LOSS) BEFORE INCOME TAXES:
Qualified cash flow hedging instruments	49			—			(7,994		)	—
Pension and other post-retirement benefit plans
Change in prior service cost (credit)	(170		)	6,204			(511		)	6,135
Change in actuarial net loss	529			404			1,503			604
Total pension and other post-retirement benefit plans	$	359		$	6,608		$	992		$	6,739
INCOME TAX EXPENSE (BENEFIT) RELATED TO OTHER COMPREHENSIVE INCOME	163			2,622			(3,565		)	2,674
OTHER COMPREHENSIVE INCOME (LOSS)	$	245		$	3,986		$	(3,437	)	$	4,065
COMPREHENSIVE INCOME (LOSS)	$	(15,115	)	$	(7,624	)	$	127,206		$	72,957

The accompanying notes are an integral part of these statements.

6

WGL Holdings, Inc.

Condensed Consolidated Statements of Cash Flows (Unaudited)

Part I—Financial Information

Item 1—Financial Statements (continued)

	Nine Months Ended June 30,
(In thousands)	2015			2014
OPERATING ACTIVITIES
Net income	$	130,643		$	68,892
ADJUSTMENTS TO RECONCILE NET INCOME TO NET CASH PROVIDED BY OPERATING ACTIVITIES
Depreciation and amortization	90,159			81,516
Amortization of:
Other regulatory assets and liabilities—net	981			461
Debt related costs	911			843
Deferred income taxes—net	36,156			(37,009		)
Accrued/deferred pension and other post-retirement benefit cost	20,091			27,056
Compensation expense related to stock-based awards	11,051			3,838
Provision for doubtful accounts	15,411			4,474
Impairment loss	5,625			2,760
Other non-cash charges (credits)—net	(617		)	5,366
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable and unbilled revenues—net	(83,076		)	(88,899		)
Gas costs and other regulatory assets/liabilities—net	5,025			7,369
Storage gas	186,096			108,792
Prepaid taxes	56,818			6,519
Other prepayments	(3,879		)	(7,903		)
Accounts payable and other accrued liabilities	(17,877		)	38,124
Wages payable	(1,089		)	(1,179		)
Customer deposits and advance payments	5,013			(11,562		)
Unamortized investment tax credits	17,162			34,360
Accrued taxes	23,240			4,282
Accrued interest	10,166			7,844
Other current assets	3,609			10,389
Other current liabilities	10,354			813
Deferred gas costs—net	11,954			(150,552		)
Deferred assets—other	(17,953		)	1,673
Deferred liabilities—other	(65,401		)	9,944
Derivatives	62,784			314,774
Other—net	(360		)	(27		)
Net Cash Provided by Operating Activities	512,997			442,958
FINANCING ACTIVITIES
Long-term debt issued	296,481			75,253
Long-term debt retired	—			(37,000		)
Debt issuance costs	(2,744		)	—
Notes payable issued (retired) —net	(297,500		)	(135,600		)
Dividends on common stock and preferred stock	(67,986		)	(67,367		)
Repurchase of common stock	(41,485		)	—
Net Cash Used in Financing Activities	(113,234		)	(164,714		)
INVESTING ACTIVITIES
Capital expenditures (excluding AFUDC)	(317,043		)	(241,450		)
Investments in non-utility interests	(29,618		)	(29,666		)
Distributions from non-utility interests	4,138			2,315
Net Cash Used in Investing Activities	(342,523		)	(268,801		)
INCREASE IN CASH AND CASH EQUIVALENTS	57,240			9,443
Cash and Cash Equivalents at Beginning of Year	8,811			3,478
Cash and Cash Equivalents at End of Period	$	66,051		$	12,921
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Income taxes paid—net	$	4,604		$	14,240
Interest paid	$	27,822		$	19,620
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING ACTIVITIES
Project debt financing activities—net	$	(2,032	)	$	253
Capital expenditure accruals included in accounts payable and other accrued liabilities	$	30,489		$	21,400
Dividends paid in common stock	$	—		$	3,967

The accompanying notes are an integral part of these statements.

7

Washington Gas Light Company

Condensed Balance Sheets (Unaudited)

Part I—Financial Information

Item 1—Financial Statements (continued)

(In thousands)	June 30, 2015			September 30, 2014
ASSETS
Property, Plant and Equipment
At original cost	$	4,400,838		$	4,250,194
Accumulated depreciation and amortization	(1,245,555		)	(1,228,130		)
Net property, plant and equipment	3,155,283			3,022,064
Current Assets
Cash and cash equivalents	61,770			1,060
Receivables
Accounts receivable	157,893			121,419
Gas costs and other regulatory assets	6,016			3,752
Unbilled revenues	23,576			20,881
Allowance for doubtful accounts	(18,880		)	(19,209		)
Net receivables	168,605			126,843
Materials and supplies—principally at average cost	20,409			23,600
Storage gas	60,348			156,083
Deferred income taxes	17,484			22,916
Prepaid taxes	5,438			16,137
Other prepayments	12,459			14,272
Receivables from associated companies	4,838			4,821
Derivatives	7,244			3,884
Assets held for sale	22,920			—
Other	1			—
Total current assets	381,516			369,616
Deferred Charges and Other Assets
Regulatory assets
Gas costs	179,392			191,346
Pension and other post-retirement benefits	174,036			191,896
Other	74,503			71,584
Prepaid post-retirement benefits	108,282			95,660
Derivatives	12,291			9,455
Other	11,641			13,457
Total deferred charges and other assets	560,145			573,398
Total Assets	$	4,096,944		$	3,965,078
CAPITALIZATION AND LIABILITIES
Capitalization
Common shareholder’s equity	$	1,120,717		$	1,050,166
Preferred stock	28,173			28,173
Long-term debt	702,201			679,228
Total capitalization	1,851,091			1,757,567
Current Liabilities
Current maturities of long-term debt	45,000			20,000
Notes payable	—			89,000
Accounts payable and other accrued liabilities	128,968			176,467
Wages payable	17,483			18,290
Accrued interest	12,129			3,488
Dividends declared	20,221			19,722
Customer deposits and advance payments	73,084			68,318
Gas costs and other regulatory liabilities	29,852			22,563
Accrued taxes	57,609			24,610
Payables to associated companies	66,855			54,685
Derivatives	37,027			33,858
Liabilities held for sale	1,621			—
Other	6,030			7,199
Total current liabilities	495,879			538,200
Deferred Credits
Unamortized investment tax credits	5,851			6,479
Deferred income taxes	673,586			619,946
Accrued pensions and benefits	124,214			118,954
Asset retirement obligations	177,292			173,775
Regulatory liabilities
Accrued asset removal costs	340,844			327,388
Other post-retirement benefits	80,404			85,814
Other	18,785			17,588
Derivatives	292,920			260,789
Other	36,078			58,578
Total deferred credits	1,749,974			1,669,311
Commitments and Contingencies (Note 13)
Total Capitalization and Liabilities	$	4,096,944		$	3,965,078

The accompanying notes are an integral part of these statements.

8

Washington Gas Light Company

Condensed Statements of Income (Unaudited)

Part I—Financial Information

Item 1—Financial Statements (continued)

	Three Months Ended   June 30,						Nine Months Ended   June 30,
(In thousands)	2015			2014			2015			2014
OPERATING REVENUES	$	190,345		$	197,752		$	1,193,232		$	1,304,975
OPERATING EXPENSES
Utility cost of gas	64,452			67,249			518,945			731,452
Operation and maintenance	80,077			75,286			240,714			223,798
Depreciation and amortization	27,348			25,500			80,832			75,942
General taxes and other assessments	25,197			25,391			114,903			116,190
Total Operating Expenses	197,074			193,426			955,394			1,147,382
OPERATING INCOME (LOSS)	(6,729		)	4,326			237,838			157,593
Other expense—net	(129		)	(304		)	(748		)	(394		)
Interest expense	10,637			9,422			31,465			27,694
INCOME (LOSS) BEFORE INCOME TAXES	(17,495		)	(5,400		)	205,625			129,505
INCOME TAX EXPENSE (BENEFIT)	(6,071		)	(5,209		)	77,404			41,383
NET INCOME (LOSS)	$	(11,424	)	$	(191	)	$	128,221		$	88,122
Dividends on Washington Gas preferred stock	330			330			990			990
NET INCOME (LOSS) APPLICABLE TO COMMON STOCK	$	(11,754	)	$	(521	)	$	127,231		$	87,132

The accompanying notes are an integral part of these statements.

9

Washington Gas Light Company

Condensed Consolidated Statements of Comprehensive Income (Unaudited)

Part I—Financial Information

Item 1—Financial Statements (continued)

	Three Months Ended   June 30,						Nine Months Ended June 30,
(In thousands)	2015			2014			2015			2014
NET INCOME (LOSS)	$	(11,424	)	$	(191	)	$	128,221		$	88,122
OTHER COMPREHENSIVE INCOME, BEFORE INCOME TAXES:
Pension and other post-retirement benefit plans
Change in prior service cost (credit)	(170		)	6,204			(511		)	6,135
Change in actuarial net loss	529			404			1,503			604
Total pension and other post-retirement benefit plans	$	359		$	6,608		$	992		$	6,739
INCOME TAX EXPENSE RELATED TO OTHER COMPREHENSIVE INCOME	143			2,622			394			2,674
OTHER COMPREHENSIVE INCOME	$	216		$	3,986		$	598		$	4,065
COMPREHENSIVE INCOME (LOSS)	$	(11,208	)	$	3,795		$	128,819		$	92,187

The accompanying notes are an integral part of these statements.

10

Washington Gas Light Company

Condensed Statements of Cash Flows (Unaudited)

Part I—Financial Information

Item 1—Financial Statements (continued)

	Nine Months Ended June 30,
(In thousands)	2015			2014
OPERATING ACTIVITIES
Net income	$	128,221		$	88,122
ADJUSTMENTS TO RECONCILE NET INCOME TO NET CASH PROVIDED BY OPERATING ACTIVITIES
Depreciation and amortization	80,832			75,942
Amortization of:
Other regulatory assets and liabilities—net	981			461
Debt related costs	967			843
Deferred income taxes—net	28,568			(36,003		)
Accrued/deferred pension and other post-retirement benefit cost	19,610			26,740
Compensation expense related to stock-based awards	12,518			2,597
Provision for doubtful accounts	10,520			2,914
Impairment loss	—			2,760
Other non-cash charges—net	2,344			1,959
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable, unbilled revenues and receivables from associated companies—net	(50,035		)	(94,146		)
Gas costs and other regulatory assets/liabilities—net	5,025			7,369
Storage gas	95,735			25,850
Other prepayments	12,513			1,422
Accounts payable and other accrued liabilities, including payables to associated companies	(18,939		)	47,973
Wages payable	(807		)	(1,133		)
Customer deposits and advance payments	4,766			(11,562		)
Accrued taxes	32,999			56,033
Accrued interest	8,641			7,844
Other current assets	3,980			3,626
Other current liabilities	452			10,798
Deferred gas costs—net	11,954			(150,552		)
Deferred assets—other	(17,430		)	1,695
Deferred liabilities—other	(9,013		)	(9,192		)
Derivatives	29,104			274,373
Other—net	(835		)	(226		)
Net Cash Provided by Operating Activities	392,671			336,507
FINANCING ACTIVITIES
Long-term debt issued	50,000			75,253
Long-term debt retired	—			(37,000		)
Debt issuance costs	(722		)	—
Notes payable issued (retired) —net	(89,000		)	(124,500		)
Dividends on common stock and preferred stock	(59,542		)	(59,208		)
Net Cash Used in Financing Activities	(99,264		)	(145,455		)
INVESTING ACTIVITIES
Capital expenditures (excluding AFUDC)	(232,697		)	(180,195		)
Net Cash Used In Investing Activities	(232,697		)	(180,195		)
INCREASE IN CASH AND CASH EQUIVALENTS	60,710			10,857
Cash and Cash Equivalents at Beginning of Year	1,060			—
Cash and Cash Equivalents at End of Period	$	61,770		$	10,857
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Income taxes paid — net	$	3,711		$	11,536
Interest paid	$	20,583		$	19,294
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING ACTIVITIES
Project debt financing activities—net	$	(2,032	)	$	253
Capital expenditure accruals included in accounts payable and other accrued liabilities	$	25,367		$	13,865

The accompanying notes are an integral part of these statements.

11

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

NOTE 1. ACCOUNTING POLICIES

Basis of Presentation

WGL Holdings, Inc. (WGL) is a holding company that owns all of the shares of common stock of Washington Gas Light Company (Washington Gas), a regulated natural gas utility, all of the shares of common stock of Washington Gas Resources Corporation (Washington Gas Resources) and Hampshire Gas Company (Hampshire). Washington Gas Resources owns all of the shares of common stock of four non-utility subsidiaries that include WGL Energy Services, Inc. (WGL Energy Services), WGL Energy Systems, Inc. (WGL Energy Systems), WGL Midstream, Inc. (WGL Midstream) and WGSW, Inc. (WGSW). Except where the content clearly indicates otherwise, “WGL,” “we,” “us” or “our” refers to the holding company or the consolidated entity of WGL Holdings, Inc. and all of its subsidiaries. Unless otherwise noted, these notes apply equally to WGL and Washington Gas.

The condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). Therefore, certain financial information and note disclosures accompanying annual financial statements prepared in accordance with generally accepted accounting principles in the United States of America (GAAP) are omitted in this interim report. The interim consolidated financial statements and accompanying notes should be read in conjunction with the combined Annual Report on Form 10-K for WGL and Washington Gas for the fiscal year ended September 30, 2014. Due to the seasonal nature of our businesses, the results of operations for the periods presented in this report are not necessarily indicative of actual results for the full fiscal years ending September 30, 2015 and 2014 of either WGL or Washington Gas.

The accompanying unaudited financial statements for WGL and Washington Gas reflect all normal recurring adjustments that are necessary, in our opinion, to present fairly the results of operations in accordance with GAAP.

For a complete description of our accounting policies, refer to Note 1 of the Notes to Consolidated Financial Statements of the combined Annual Report on Form 10-K for WGL and Washington Gas for the fiscal year ended September 30, 2014.

Assets Held for Sale

At June 30, 2015, the Springfield Operations Center met the criteria to be reported as held for sale. Among other things, those criteria specify that (a) the asset must be available for immediate sale in its present condition subject only to terms that are usual and customary for sales of such assets and (b) the sale of the asset must be probable, and its transfer expected to qualify for recognition as a completed sale, within one year, with certain exceptions. The assets and liabilities associated with the Springfield Operations Center were reported as "Assets held for sale" and "Liabilities held for sale" on WGL's and Washington Gas' balance sheets as of June 30, 2015. Washington Gas recorded approximately $0.5 million in transaction fees in "Operations and maintenance expense" in the accompanying statements of income related to selling the facility.

Storage Gas Valuations

For Washington Gas and WGL Energy Services, storage gas inventories are stated at the lower-of-cost or market as determined using the first-in, first-out method. For WGL Midstream, storage gas inventory is stated at the lower-of-cost or market using the weighted average cost method. Interim period inventory losses attributable to lower-of-cost or market adjustments may be reversed if the market value of the inventory is recovered by the end of the same fiscal year.

The following table shows the lower-of-cost or market (LCM) adjustments recorded to net income for the three and nine months ended June 30, 2015 and 2014.

Lower-of-Cost or Market Adjustments Pre-Tax Increase (Decrease) to Net Income
	Three Months Ended June 30,					Nine Months Ended June 30,
(In millions)	2015		2014			2015			2014
WGL(a)
Operating revenues - non-utility	$	0.9	$	(0.8	)	$	(19.6	)	$	(0.8	)
Washington Gas
Utility cost of gas	$	—	$	—		$	(1.0	)	$	(0.4	)
Total Consolidated	$	0.9	$	(0.8	)	$	(20.6	)	$	(1.2	)

12

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

(a) WGL includes WGL Holdings and all subsidiaries other than Washington Gas.

ACCOUNTING STANDARDS ADOPTED IN FISCAL YEAR 2015
Standard	Description	Date of adoption	Effect on the financial statements or other significant matters
ASU 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (Topic 740)	The standard requires an unrecognized tax benefit, or a portion of an unrecognized tax benefit to be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar loss, or a tax credit carryforward.	October 1, 2014	As a result of the implementation of this standard, we reduced our deferred tax assets by a portion of our unrecognized tax benefits. The adoption of this standard did not have a material effect on our financial statements.

OTHER NEWLY ISSUED ACCOUNTING STANDARDS
Standard	Description	Date of adoption	Effect on the financial statements or other significant matters
ASU 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Cost	The standard requires an entity to present debt issuance costs in the balance sheet as a direct deduction of the debt liability in a manner consistent with its accounting treatment of debt discounts.	October 1, 2016	We are in the process of evaluating the impact the adoption of this standard will have on our financial statements.
ASU 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis	The standard changes the analysis to be performed in determining whether certain types of legal entities should be consolidated, specifically the analysis of limited partnerships and similar entities, fee arrangements and related party relationships.	October 1, 2016	We are in the process of evaluating the impact the adoption of this standard will have on our financial statements.
ASU 2014-09, Revenue from Contracts with Customers (Topic 606)	The standard establishes a comprehensive revenue recognition model clarifying the method used to determine the timing and requirements for revenue recognition from contracts with customers. The disclosure requirements under the new standard will enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers.	October 1, 2018	We are in the process of evaluating the impact the adoption of this standard will have on our financial statements.

13

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

NOTE 2. ACCOUNTS PAYABLE AND OTHER ACCRUED LIABILITIES

The tables below provide details for the amounts included in “Accounts payable and other accrued liabilities” on the balance sheets for both WGL and Washington Gas.

WGL Holdings, Inc.
(In millions)	June 30, 2015		September 30, 2014
Accounts payable—trade	$	234.6	$	278.8
Employee benefits and payroll accruals	25.8		19.8
Other accrued liabilities	15.2		14.6
Total	$	275.6	$	313.2

Washington Gas Light Company
(In millions)	June 30, 2015		September 30, 2014
Accounts payable—trade	$	96.4	$	146.4
Employee benefits and payroll accruals	24.1		18.2
Other accrued liabilities	8.5		11.9
Total	$	129.0	$	176.5

NOTE 3. SHORT-TERM DEBT

WGL and Washington Gas satisfy their short-term financing requirements through the sale of commercial paper or through bank borrowings. Due to the seasonal nature of the regulated utility and retail energy-marketing segments, short-term financing requirements can vary significantly during the year. Revolving credit agreements are maintained to support outstanding commercial paper and to permit short-term borrowing flexibility. The policy of each WGL and Washington Gas is to maintain bank credit facilities in amounts equal to or greater than the expected maximum commercial paper position. The following is a summary of committed credit available at June 30, 2015 and September 30, 2014.

Committed Credit Available(In millions)
June 30, 2015	WGL(b)			Washington Gas			Total Consolidated
Committed credit agreements
Unsecured revolving credit facility, expires December 19, 2019(a)	$	450.0		$	350.0		$	800.0
Less: Commercial Paper	(156.0		)	—			(156.0		)
Net committed credit available	$	294.0		$	350.0		$	644.0
Weighted average interest rate	0.27		%	—		%	0.27		%
September 30, 2014
Committed credit agreements
Unsecured revolving credit facility, expires April 3, 2017(a)	$	450.0		$	350.0		$	800.0
Less: Commercial Paper	(364.5		)	(89.0		)	(453.5		)
Net committed credit available	$	85.5		$	261.0		$	346.5
Weighted average interest rate	0.20		%	0.13		%	0.19		%

^(a)  Both WGL and Washington Gas have the right to request extensions with the banks’ approval. WGL’s revolving credit facility permits it to borrow an additional $100 million, with the banks’ approval, for a total of $550 million. Washington Gas’ revolving credit facility permits it to borrow an additional $100 million, with the banks’ approval, for a total of $450 million.

^(b)  WGL includes WGL Holdings and all subsidiaries other than Washington Gas.

In December 2014, both WGL and Washington Gas entered into a first amendment to their respective credit agreements, each dated April 3, 2012. The amendments extend the maturity date of the credit facilities from April 3, 2017 to December 19,

14

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

2019, provided that the credit facilities will terminate on September 30, 2017. Under the credit agreements, as amended, WGL and Washington Gas each have the right to request two one-year-extensions, with the banks' approval. At June 30, 2015 and September 30, 2014, there were no outstanding bank loans from WGL’s or Washington Gas’ revolving credit facilities.

NOTE 4. LONG-TERM DEBT

UNSECURED NOTES

WGL and Washington Gas issue long-term notes with individual terms regarding interest rates, maturities and call or put options. These notes can have maturity dates of one or more years from the date of issuance.

At June 30, 2015 and September 30, 2014, WGL had the capacity under a shelf registration to issue an unspecified amount of long-term senior notes debt securities. At September 30, 2014 Washington Gas had the capacity to issue up to $275.0 million of additional long-term Medium-Term Notes (MTNs) under a shelf registration that expired on May 31, 2015. Washington Gas intends to file a shelf registration in the fourth quarter of fiscal year 2015 to issue additional MTNs.

The following tables show the outstanding notes as of June 30, 2015 and September 30, 2014.

Senior Notes, MTNs and Private Placement Notes Outstanding
($ In millions)	WGL(a)			Washington Gas			Total Consolidated
June 30, 2015
Long-term notes(b)	$	250.0		$	741.0		$	991.0
Weighted average interest rate	3.66		%	5.56		%	5.08		%
September 30, 2014
Long-term notes(b)	$	—		$	691.0		$	691.0
Weighted average interest rate	n/a			5.65		%	5.65		%

^(a)  WGL includes WGL Holdings and all subsidiaries other than Washington Gas.

^(b)  Includes Senior Notes for WGL and both MTNs and private placement notes for Washington Gas. Represents face value including current maturities.

15

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

The following tables show senior notes, MTN and private placement issuances and retirements for the nine months ended June 30, 2015 and 2014.

Senior Notes, MTNs and Private Placement Issuances and Retirements
($ In millions)	Principal(b)		Interest Rate		Effective Cost(c)		Nominal Maturity Date
Nine Months Ended June 30, 2015
WGL(a)
Issuances:
10/24/2014	$	100.0	2.25	%	2.42	%	11/1/2019
10/24/2014	125.0		4.60	%	5.11	%	11/1/2044
12/16/2014	25.0		4.60	%	5.53	%	11/1/2044
Total	$	250.0
Washington Gas
Issuances:
12/15/2014	$	50.0	4.24	%	4.41	%	12/15/2044
Total	$	50.0
Total consolidated issuances	$	300.0
Nine Months Ended June 30, 2014
Washington Gas
Issuances:
12/5/2013	$	75.0	5.00	%	4.95	%	12/15/2043
Total	$	75.0
Retirements:
11/7/2013	$	37.0	4.88	%	n/a		11/7/2013
Total	$	37.0

^(a)  WGL includes WGL Holdings and all subsidiaries other than Washington Gas.

^(b)  Represents face amount.

^(c)  The estimated effective cost of the issued notes, including consideration of issuance fees and hedge costs.

16

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

NOTE 5. COMMON SHAREHOLDERS’ EQUITY

The tables below reflect the components of “Common shareholders’ equity” for WGL and “Common shareholder’s equity” for Washington Gas for the nine months ended June 30, 2015.

WGL Holdings, Inc. Components of Common Shareholders’ Equity
(In thousands)	Common Stock Amount			Paid-In Capital		Retained Earnings			Accumulated Other Comprehensive Loss, Net of Taxes			Total
Balance at September 30, 2014	$	525,932		$	11,847	$	716,758		$	(7,961	)	$	1,246,576
Net income	—			—		130,643			—			130,643
Other comprehensive loss	—			—		—			(3,437		)	(3,437		)
Repurchase of common stock	(41,485		)	—		—			—			(41,485		)
Stock-based compensation	1,009			1,934		—			—			2,943
Dividends declared:
Common stock	—			—		(67,877		)	—			(67,877		)
Preferred stock	—			—		(990		)	—			(990		)
Balance at June 30, 2015	$	485,456		$	13,781	$	778,534		$	(11,398	)	$	1,266,373

Washington Gas Light Company Components of Common Shareholder’s Equity
(In thousands)	Common Stock Amount		Paid-In Capital		Retained Earnings			Accumulated Other Comprehensive Income (Loss), Net of Taxes			Total
Balance at September 30, 2014	$	46,479	$	480,620	$	529,480		$	(6,413	)	$	1,050,166
Net income	—		—		128,221			—			128,221
Other comprehensive income	—		—		—			598			598
Stock-based compensation	—		1,773		—			—			1,773
Dividends declared:
Common stock	—		—		(59,051		)	—			(59,051		)
Preferred stock	—		—		(990		)	—			(990		)
Balance at June 30, 2015	$	46,479	$	482,393	$	597,660		$	(5,815	)	$	1,120,717

WGL had 49,728,662 and 50,656,553 shares issued of common stock at June 30, 2015 and September 30, 2014, respectively. Washington Gas had 46,479,536 shares issued of common stock at both June 30, 2015 and September 30, 2014.

17

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

NOTE 6. EARNINGS PER SHARE

Basic EPS of WGL is computed by dividing net income by the weighted average number of common shares outstanding during the reported period. Diluted EPS assumes the issuance of common shares pursuant to stock-based compensation plans at the beginning of the applicable period unless the effect of such issuance would be anti-dilutive. The following table reflects the computation of our basic and diluted EPS for the three and nine months ended June 30, 2015 and 2014.

Basic and Diluted EPS
(in thousands, except per share data)	Net Income (Loss) Applicable to Common Stock			Shares	Per Share Amount
Three Months Ended June 30, 2015
Basic EPS	$	(15,690	)	49,729	$	(0.32	)
Stock-based compensation plans	—			—
Diluted EPS	$	(15,690	)	49,729	$	(0.32	)
Three Months Ended June 30, 2014
Basic EPS	$	(11,940	)	51,921	$	(0.23	)
Stock-based compensation plans	—			—
Diluted EPS	$	(11,940	)	51,921	$	(0.23	)
Nine Months Ended June 30, 2015
Basic EPS	$	129,653		49,814	$	2.60
Stock-based compensation plans	—			242
Diluted EPS	$	129,653		50,056	$	2.59
Nine Months Ended June 30, 2014
Basic EPS	$	67,902		51,871	$	1.31
Stock-based compensation plans	—			14
Diluted EPS	$	67,902		51,885	$	1.31

We incurred a net loss for the three months ended June 30, 2015 and June 30, 2014; therefore, all common shares issuable pursuant to stock-based compensation plans, were not considered in the diluted loss per share calculations due to the anti-dilutive effect of such shares. These shares include performance shares of 317,000 shares for the three months ended June 30, 2015, and weighted average stock option and dividend reinvestment shares of 5,000 shares and 2,000 shares, respectively, for the three months ended June 30, 2014. There were no anti-dilutive shares for the nine months ended June 30, 2015 or 2014.

NOTE 7. INCOME TAXES

As of June 30, 2015 and September 30, 2014, our uncertain tax positions were approximately $31.1 million and $32.6 million, respectively, primarily due to the change in tax accounting for repairs. If the amounts of unrecognized tax benefits are eventually realized, it would not materially impact the effective tax rate. It is reasonably possible that the amount of the unrecognized tax benefit with respect to some of WGL’s and Washington Gas’ uncertain tax positions will significantly increase or decrease in the next 12 months. At this time, however, an estimate of the range of reasonably possible outcomes cannot be determined.

Under ASC Topic 740, Income Taxes, Washington Gas recognizes any accrued interest associated with uncertain tax positions in interest expense and recognizes any accrued penalties associated with uncertain tax positions in other expenses in the statements of income. At June 30, 2015, we did not have an accrual of interest expense related to uncertain tax positions. At September 30, 2014, we had a total accrual of $0.1 million of interest expense related to uncertain tax positions included in other deferred credits in the accompanying balance sheets.

WGL files a consolidated federal tax return and various other state returns. We are no longer subject to income tax examinations by the Internal Revenue Service for years ended prior to September 30, 2011. Substantially all state income tax years in major jurisdictions are closed for years ended prior to September 30, 2010.

Washington Gas charged the Maryland portion of the Medicare Part D (Med D) regulatory asset to tax expense during the fiscal year ended September 30, 2012 based on positions taken by the Maryland Public Service Commission (PSC of MD) in Washington Gas’ rate case during that fiscal year that did not permit recovery. Washington Gas received an order in the first

18

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

quarter of fiscal year ended September 30, 2014 from the PSC of MD that did allow recovery of the Med D regulatory asset over a five year amortization period beginning December 2013. Therefore, the reinstatement of the regulatory asset is reflected in the effective tax rate for the nine months ended June 30, 2014.

NOTE 8. DERIVATIVE AND WEATHER-RELATED INSTRUMENTS

DERIVATIVE INSTRUMENTS

Regulated Utility Operations

Washington Gas enters into contracts that qualify as derivative instruments and are accounted for under ASC Topic 815. These derivative instruments are recorded at fair value on our balance sheet and Washington Gas does not designate any derivatives as hedges under ASC Topic 815. Washington Gas’ derivative instruments relate to: (i) Washington Gas’ asset optimization program; (ii) managing price risk associated with the purchase of gas to serve utility customers and (iii) managing interest rate risk.

Asset Optimization. Washington Gas optimizes the value of its long-term natural gas transportation and storage capacity resources during periods when these resources are not being used to physically serve utility customers. Specifically, Washington Gas utilizes its transportation capacity assets to benefit from favorable natural gas prices between different geographic locations and utilizes its storage capacity assets to benefit from favorable natural gas prices between different time periods. As part of this asset optimization program, Washington Gas enters into physical and financial derivative transactions in the form of forward, futures and option contracts with the primary objective of locking in operating margins that Washington Gas will ultimately realize. The derivatives used under this program are subject to mark-to-market accounting treatment while the capacity and transportation resources are not.

Regulatory sharing mechanisms allow the profit from these transactions to be shared between Washington Gas’ shareholders and customers; therefore, any changes in fair value are recorded through earnings, or as regulatory assets or liabilities to the extent that gains and losses associated with these derivative instruments will be included in the rates charged to customers when they are realized. Valuation changes for the portion of net profits to be retained for shareholders may cause significant period-to-period volatility in earnings from unrealized gains and losses. This volatility does not change the locked-in operating margins that Washington Gas expects to ultimately realize from these transactions through the use of its storage and transportation capacity resources.

All physically and financially settled contracts under our asset optimization program are reported on a net basis in the statements of income in “Utility cost of gas.” Total net margins recorded to “Utility cost of gas” after sharing and management fees associated with all asset optimization transactions for the three months ended June 30, 2015 was a loss of $2.9 million including an unrealized loss of $10.4 million. During the three months ended June 30, 2014 we recorded a gain of $1.9 million including an unrealized loss of $1.2 million. Total net margins recorded for the nine months ended June 30, 2015 was a gain of $14.2 million including an unrealized loss of $13.3 million. During the nine months ended June 30, 2014, we recorded a loss of $78.3 million including an unrealized loss of $105.3 million.

Managing Price Risk. To manage price risk associated with acquiring natural gas supply for utility customers, Washington Gas enters into forward contracts, option contracts, financial contracts and other contracts, as authorized by its regulators. These instruments are accounted for as derivative instruments. Any gains and losses associated with these derivatives are recorded as regulatory liabilities or assets, respectively, to reflect the rate treatment for these economic hedging activities.

Managing Interest-Rate Risk. Washington Gas utilizes derivative instruments that are designed to minimize the risk of interest-rate volatility associated with planned issuances of debt securities. Any gains and losses associated with these types of derivatives are recorded as regulatory liabilities or assets, respectively, and amortized in accordance with regulatory requirements, typically over the life of the newly issued debt.

Non-Utility Operations

Asset Optimization. WGL Midstream enters into derivative contracts for the purpose of optimizing its storage and transportation capacity as well as managing the transportation and storage assets on behalf of third parties. WGL Midstream does not designate these derivatives as hedges under ASC Topic 815; therefore, changes in the fair value of these derivative instruments are reflected in the earnings of our non-utility operations and may cause significant period-to-period volatility in

19

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

earnings. The storage and transportation capacities utilized by WGL Midstream are not considered to be derivative instruments, and thus they are not recorded at fair value on our consolidated balance sheets.

Managing Price Risk. WGL Energy Services enters into certain derivative contracts as part of managing the price risk associated with the sale and purchase of natural gas and electricity. WGL Energy Services designates a portion of these physical contracts related to the purchase of natural gas and electricity to serve our customers as "normal purchases and normal sales" and therefore, they are not subject to the fair value accounting requirements of ASC Topic 815. Derivative instruments not designated as "normal purchases and normal sales" are recorded at fair value on our consolidated balance sheets, and changes in the fair value of these derivative instruments are reflected in the earnings of our non-utility operations, which may cause significant period-to-period volatility in earnings. WGL Energy Services does not designate derivatives as hedges under ASC Topic 815.

Managing Interest-Rate Risk. WGL utilizes derivative instruments that are designed to minimize the risk of interest-rate volatility associated with future debt issuances. WGL elected cash flow hedge accounting for its interest rate derivative instruments, which settled with the issuance of the related debt issuance in the first quarter of 2015. The effective portion of the gains and losses on the hedge were recorded within other comprehensive income and are being amortized over the life of the debt (through 2044). The amortization will be minimal for fiscal 2015.

Consolidated Operations

Reflected in the tables below is information for WGL as well as Washington Gas. The information for WGL includes derivative instruments for both utility and non-utility operations.

At June 30, 2015 and September 30, 2014, respectively, the absolute notional amounts of our derivatives were as follows:

Absolute Notional Amounts of Open Positions on Derivative Instruments
Derivative transactions	WGL Holdings, Inc.	Washington Gas
June 30, 2015	Notional Amounts
Natural Gas(In millions of therms)
Asset Optimization	21,296.2	13,722.3
Retail sales	0.8	—
Other risk-management activities	1,786.9	1,377.4
Electricity(In millions of kWhs)
Retail sales	4,474.0	—
Other risk-management activities	20,683.5	—
September 30, 2014
Natural Gas(In millions of therms)
Asset Optimization	20,593.3	13,740.9
Retail sales	44.7	—
Other risk-management activities	1,641.3	1,398.2
Electricity(In millions of kWhs)
Retail sales	3,831.4	—
Other risk-management activities	16,734.1	—
Warrants(In millions of shares)	4.6	—
Interest Rate Swaps(In millions of dollars)	150.0	—

20

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

The following tables present the balance sheet classification for all derivative instruments as of June 30, 2015 and September 30, 2014.

WGL Holdings, Inc. Balance Sheet Classification of Derivative Instruments
(In millions)	Derivative Instruments Not Designated as Hedging Instruments					Derivative Instruments Designated as Hedging Instruments
As of June 30, 2015	Gross Derivative Assets		Gross Derivative Liabilities			Gross Derivative Assets		Gross Derivative Liabilities			Netting of Collateral		Total(a)
Current Assets—Derivatives	$	14.5	$	(0.1	)	$	—	$	—		$	1.3	$	15.7
Deferred Charges and Other Assets—Derivatives	28.5		(0.2		)	—		—			—		28.3
Current Liabilities—Derivatives	23.9		(86.2		)	—		—			3.5		(58.8		)
Deferred Credits—Derivatives	2.0		(362.0		)	—		—			5.7		(354.3		)
Total	$	68.9	$	(448.5	)	$	—	$	—		$	10.5	$	(369.1	)
As of September 30, 2014
Current Assets—Derivatives	$	20.8	$	(2.5	)	$	—	$	—		$	—	$	18.3
Deferred Charges and Other Assets—Derivatives	18.7		—			—		—			—		18.7
Current Liabilities—Derivatives	15.4		(70.3		)	—		(1.7		)	8.0		(48.6		)
Deferred Credits—Derivatives	17.7		(316.4		)	—		—			4.0		(294.7		)
Total	$	72.6	$	(389.2	)	$	—	$	(1.7	)	$	12.0	$	(306.3	)

Washington Gas Light Company Balance Sheet Classification of Derivative Instruments(b)
(In millions)
As of June 30, 2015	Gross Derivative Assets		Gross Derivative Liabilities			Netting of Collateral		Total(a)
Current Assets—Derivatives	$	5.9	$	—		$	1.3	$	7.2
Deferred Charges and Other Assets—Derivatives	12.4		(0.1		)	—		12.3
Current Liabilities—Derivatives	7.8		(44.8		)	—		(37.0		)
Deferred Credits—Derivatives	0.6		(293.5		)	—		(292.9		)
Total	$	26.7	$	(338.4	)	$	1.3	$	(310.4	)
As of September 30, 2014
Current Assets—Derivatives	$	3.9	$	—		$	—	$	3.9
Deferred Charges and Other Assets—Derivatives	9.5		—			—		9.5
Current Liabilities—Derivatives	8.6		(43.2		)	0.7		(33.9		)
Deferred Credits—Derivatives	4.2		(265.2		)	0.2		(260.8		)
Total	$	26.2	$	(308.4	)	$	0.9	$	(281.3	)

(a) WGL has elected to offset the fair value of recognized derivative instruments against the right to reclaim or the obligation to return collateral for derivative instruments executed under the same master netting arrangement in accordance with ASC 815. All recognized derivative contracts and associated financial collateral subject to a master netting arrangement or similar that is eligible for offset under ASC 815 have been presented net in the balance sheet.

(b) Washington Gas did not have any derivative instruments outstanding that were designated as hedging instruments at June 30, 2015 or September 30, 2014.

21

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

The following table presents all gains and losses associated with derivative instruments for the three and nine months ended June 30, 2015 and 2014.

Gains and Losses on Derivative Instruments
(In millions)	WGL Holdings, Inc.						Washington Gas
Three Months Ended June 30,	2015			2014			2015			2014
Recorded to income
Operating revenues—non-utility	$	(28.3	)	$	(21.3	)	$	—		$	—
Utility cost of gas	(10.4		)	(2.0		)	(10.4		)	(2.0		)
Non-utility cost of energy-related sales	3.2			2.8			—			—
Other income-net	—			(0.6		)	—			—
Recorded to regulatory assets
Gas costs	(12.1		)	(12.5		)	(12.1		)	(12.5		)
Total	$	(47.6	)	$	(33.6	)	$	(22.5	)	$	(14.5	)
Nine Months Ended June 30,	2015			2014			2015			2014
Recorded to income
Operating revenues—non-utility	$	46.0		$	(105.6	)	$	—		$	—
Utility cost of gas	(20.4		)	(125.7		)	(20.4		)	(125.7		)
Non-utility cost of energy-related sales	(35.9		)	46.7			—			—
Other income-net	—			(0.5		)	—			—
Interest expense(a)	(0.5		)	—			—			—
Recorded to regulatory assets
Gas costs	(36.0		)	(224.5		)	(36.0		)	(224.5		)
Other	—			1.2			—			1.2
Recorded to other comprehensive income(b)	(8.0		)	—			—			—
Total	$	(54.8	)	$	(408.4	)	$	(56.4	)	$	(349.0	)

(a) Represents $(0.4) million of ineffectiveness for our cash flow hedge and $(0.1) million of amortization of amounts previously recorded to Accumulated Other Comprehensive Income.

(b) Represents the effective portion of our cash flow hedge of $(8.1) million less $(0.1) million of amortization that was reclassified to interest expense.

Collateral

WGL utilizes standardized master netting agreements, which facilitate the netting of cash flows into a single net exposure for a given counterparty. As part of these master netting agreements, cash, letters of credit and parental guarantees may be required to be posted or obtained from counterparties in order to mitigate credit risk related to both derivatives and non-derivative positions. Under WGL’s offsetting policy, collateral balances are offset against the related counterparties’ derivative positions to the extent the application would not result in the over-collateralization of those derivative positions on the balance sheet. At June 30, 2015, Washington Gas, WGL Energy Services and WGL Midstream posted $6.5 million, $8.9 million and $9.9 million, respectively, of collateral deposits with counterparties that were not offset against open and settled derivative contracts. At September 30, 2014, Washington Gas, WGL Energy Services and WGL Midstream posted $8.2 million, $5.7 million and $11.4 million, respectively, of collateral deposits with counterparties that were not offset against open and settled derivative contracts. At June 30, 2015, Washington Gas, WGL Energy Services and WGL Midstream held $4.1 million, $0.1 million and $0.1 million, respectively of cash collateral representing an obligation to counterparties that was not offset against open and settled derivative contracts. At September 30, 2014, Washington Gas held $2.5 million of cash collateral representing an obligation to counterparties that was not offset against open and settled derivative contracts. Any collateral posted that is not offset against open and settled derivative contracts is included in “Other prepayments” in the accompanying balance sheet. Collateral received and not offset against open and settled derivative contracts is included in “Customer deposits and advance payments” in the accompanying balance sheet.

Certain derivative instruments of Washington Gas, WGL Energy Services and WGL Midstream contain contract provisions that require collateral to be posted if the credit rating of Washington Gas or WGL falls below certain levels or if counterparty exposure to WGL Energy Services or WGL Midstream exceeds a certain level. Due to counterparty exposure levels, at June 30, 2015, WGL Energy Services posted $5.7 million of collateral related to its derivative liabilities that contained credit-related

22

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

contingent features. At September 30, 2014, WGL Energy Services posted $5.3 million of collateral related to such derivative liabilities. Washington Gas and WGL Midstream were not required to post any collateral related to their respective derivative liabilities that contained credit-related contingent features at June 30, 2015 or September 30, 2014. The following table shows the aggregate fair value of all derivative instruments with credit-related contingent features that are in a liability position, as well as the maximum amount of collateral that would be required if the most intrusive credit-risk-related contingent features underlying these agreements were triggered on June 30, 2015 and September 30, 2014, respectively.

Potential Collateral Requirements for Derivative Liabilities with Credit-Risk-Contingent Features
(In millions)	WGL Holdings, Inc.		Washington Gas
June 30, 2015
Derivative liabilities with credit-risk-contingent features	$	54.4	$	20.1
Maximum potential collateral requirements	46.6		20.0
September 30, 2014
Derivative liabilities with credit-risk-contingent features	$	28.8	$	20.6
Maximum potential collateral requirements	16.5		16.1

Washington Gas, WGL Energy Services and WGL Midstream do not enter into derivative contracts for speculative purposes.

Concentration of Credit Risk

We are exposed to credit risk from derivative instruments with wholesale counterparties, which is represented by the fair value of these instruments at the reporting date. We actively monitor and work to minimize counterparty concentration risk through various practices. At June 30, 2015, two counterparties represented over 10% of Washington Gas’ credit exposure to wholesale derivative counterparties for a total credit risk of $23.4 million; two counterparties represented over 10% of WGL Energy Services’ credit exposure to wholesale counterparties for a total credit risk of $0.2 million; and two counterparties represented over 10% of WGL Midstream’s credit exposure to wholesale counterparties for a total credit risk of $15.0 million.

WEATHER-RELATED INSTRUMENTS

Washington Gas did not use any weather-related instruments during the three and nine months ended June 30, 2015 and 2014.

WGL Energy Services utilizes weather-related instruments for managing the financial effects of weather risks. These instruments cover a portion of WGL Energy Services’ estimated revenue or energy-related cost exposure to variations in heating or cooling degree days. These contracts provide for payment to WGL Energy Services of a fixed-dollar amount for every degree day over or under specific levels during the calculation period depending upon the type of contract executed. For the three months ended June 30, 2015 and 2014, WGL Energy Services recorded pre-tax losses of $0.5 million and $0.9 million, respectively, related to these contracts. For the nine months ended June 30, 2015 and 2014, WGL Energy Services recorded pre-tax gains of $2.7 million and $4.5 million, respectively, related to these contracts.

NOTE 9. FAIR VALUE MEASUREMENTS

Recurring Basis

We measure the fair value of our financial assets and liabilities using a combination of the income and market approach in accordance with ASC Topic 820. These financial assets and liabilities primarily consist of derivatives recorded on our balance sheet under ASC Topic 815 and short-term investments, commercial paper and long-term debt outstanding required to be disclosed at fair value. Under ASC Topic 820, fair value is defined as the exit price, representing the amount that would be received in the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. To value our financial instruments, we use market data or assumptions that market participants would use, including assumptions about credit risk (both our own credit risk and the counterparty’s credit risk) and the risks inherent in the inputs to valuation.

We enter into derivative contracts in the futures and over-the-counter (OTC) wholesale and retail markets. These markets are the principal markets for the respective wholesale and retail contracts. Our relevant market participants are our existing counterparties and others who have participated in energy transactions at our delivery points. These participants have access to the same market data as WGL. We value our derivative contracts based on an “in-exchange” premise, and valuations are

23

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

generally based on pricing service data or indicative broker quotes depending on the market location. We measure the net credit exposure at the counterparty level where the right to set-off exists. The net exposure is determined using the mark-to-market exposure adjusted for collateral, letters of credit and parent guarantees. We use published default rates from Standard & Poor’s Ratings Services and Moody’s Investors Service as inputs for determining credit adjustments.

ASC Topic 820 establishes a fair value hierarchy that prioritizes the inputs used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The three levels of the fair value hierarchy under ASC Topic 820 are described below:

Level 1.Level 1 of the fair value hierarchy consists of assets or liabilities that are valued using observable inputs based upon unadjusted quoted prices in active markets for identical assets or liabilities at the reporting date. Level 1 assets and liabilities primarily include exchange traded derivatives and securities. WGL did not have any Level 1 derivatives at June 30, 2015 or September 30, 2014.

Level 2.Level 2 of the fair value hierarchy consists of assets or liabilities that are valued using directly or indirectly observable inputs either corroborated with market data or based on exchange traded market data. Level 2 includes fair values based on industry-standard valuation techniques that consider various assumptions: (i) quoted forward prices, including the use of mid-market pricing within a bid/ask spread; (ii) discount rates; (iii) implied volatility and (iv) other economic factors. Substantially all of these assumptions are observable throughout the full term of the instrument, can be derived from observable data or are supported by observable levels at which transactions are executed in the relevant market. At June 30, 2015 and September 30, 2014, Level 2 financial assets and liabilities included energy-related derivatives such as financial contracts, options and physical forward contracts for deliveries at active market locations.

Level 3.Level 3 of the fair value hierarchy consists of assets or liabilities that are valued using significant unobservable inputs at the reporting date. These unobservable assumptions reflect our assumptions about estimates that market participants would use in pricing the asset or liability, including natural gas basis prices, annualized volatilities of natural gas prices, and electricity congestion prices. A significant change to any one of these inputs in isolation could result in a significant upward or downward fluctuation in the fair value measurement. These inputs may be used with industry standard valuation methodologies that result in our best estimate of fair value for the assets or liabilities at the reporting date.

Our Risk Analysis and Mitigation (RA&M) Group determines the valuation policies and procedures. The RA&M Group reports to WGL’s Chief Financial Officer. In accordance with WGL’s valuation policy, we may utilize a variety of valuation methodologies to determine the fair value of Level 3 derivative contracts, including internally developed valuation inputs and pricing models. The prices used in our valuations are corroborated using multiple pricing sources, and we periodically conduct assessments to determine whether each valuation model is appropriate for its intended purpose. The RA&M Group also evaluates changes in fair value measurements on a daily basis.

At June 30, 2015 and September 30, 2014, Level 3 derivative assets and liabilities included: (i) physical contracts valued at illiquid market locations with no observable market data; (ii) long-dated positions where observable pricing is not available over the life of the contract; (iii) contracts valued using historical spot price volatility assumptions and (iv) valuations using indicative broker quotes for inactive market locations.

24

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

The following tables set forth financial instruments recorded at fair value as of June 30, 2015 and September 30, 2014, respectively. A financial instrument’s classification within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement requires judgment, and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy.

WGL Holdings, Inc. Fair Value Measurements Under the Fair Value Hierarchy
(In millions)	Level 1		Level 2			Level 3			Total
At June 30, 2015
Assets
Natural gas related derivatives	$	—	$	22.4		$	22.4		$	44.8
Electricity related derivatives	—		2.1			22.0			24.1
Total Assets	$	—	$	24.5		$	44.4		$	68.9
Liabilities
Natural gas related derivatives	$	—	$	(41.0	)	$	(373.4	)	$	(414.4	)
Electricity related derivatives	—		(3.3		)	(30.8		)	(34.1		)
Total Liabilities	$	—	$	(44.3	)	$	(404.2	)	$	(448.5	)
At September 30, 2014
Assets
Natural gas related derivatives	$	—	$	22.7		$	33.7		$	56.4
Electricity related derivatives	—		0.3			15.9			16.2
Total Assets	$	—	$	23.0		$	49.6		$	72.6
Liabilities
Natural gas related derivatives	$	—	$	(39.8	)	$	(328.4	)	$	(368.2	)
Electricity related derivatives	—		(0.1		)	(20.9		)	(21.0		)
Interest rate derivatives	—		(1.7		)	—			(1.7		)
Total Liabilities	$	—	$	(41.6	)	$	(349.3	)	$	(390.9	)

Washington Gas Light Company Fair Value Measurements Under the Fair Value Hierarchy
(In millions)	Level 1		Level 2			Level 3			Total
At June 30, 2015
Assets
Natural gas related derivatives	$	—	$	14.8		$	11.9		$	26.7
Total Assets	$	—	$	14.8		$	11.9		$	26.7
Liabilities
Natural gas related derivatives	$	—	$	(19.3	)	$	(319.1	)	$	(338.4	)
Total Liabilities	$	—	$	(19.3	)	$	(319.1	)	$	(338.4	)
At September 30, 2014
Assets
Natural gas related derivatives	$	—	$	13.5		$	12.7		$	26.2
Total Assets	$	—	$	13.5		$	12.7		$	26.2
Liabilities
Natural gas related derivatives	$	—	$	(25.1	)	$	(283.3	)	$	(308.4	)
Total Liabilities	$	—	$	(25.1	)	$	(283.3	)	$	(308.4	)

25

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

The following table includes quantitative information about the significant unobservable inputs used in the fair value measurement of our Level 3 financial instruments and the respective fair values of the net derivative asset and liability positions, by contract type, as of June 30, 2015 and September 30, 2014.

Quantitative Information about Level 3 Fair Value Measurements
(In millions)	Net Fair Value June 30, 2015	Valuation Techniques	Unobservable Inputs	Range
WGL Holdings, Inc.
Natural gas related derivatives	$(351.0)	Discounted Cash Flow	Natural Gas Basis Price (per dekatherm)	($1.629) - $4.920
		Option Model	Natural Gas Basis Price (per dekatherm)	($0.153) - ($0.090)
			Annualized Volatility of Spot Market Natural Gas	30.5% to 40.2%
Electricity related derivatives	$(8.8)	Discounted Cash Flow	Electricity Congestion Price (per megawatt hour)	($3.965) - $83.900
Washington Gas Light Company
Natural gas related derivatives	$(307.2)	Discounted Cash Flow	Natural Gas Basis Price (per dekatherm)	($1.629) - $4.920
	Net Fair Value September 30, 2014
WGL Holdings, Inc.
Natural gas related derivatives	$(294.7)	Discounted Cash Flow	Natural Gas Basis Price (per dekatherm)	($2.101) - $6.154
		Option Model	Natural Gas Basis Price (per dekatherm)	($1.675) - $6.154
			Annualized Volatility of Spot Market Natural Gas	30.9% - 589.6%
Electricity related derivatives	$(5.0)	Discounted Cash Flow	Electricity Congestion Price (per megawatt hour)	($2.85) - $90.95
Washington Gas Light Company
Natural gas related derivatives	$(270.6)	Discounted Cash Flow	Natural Gas Basis Price (per dekatherm)	($2.101) - $6.154

26

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

The following tables are a summary of the changes in the fair value of our derivative instruments that are measured at net fair value on a recurring basis in accordance with ASC Topic 820 using significant Level 3 inputs during the three and nine months ended June 30, 2015 and 2014, respectively.

WGL Holdings, Inc. Reconciliation of Fair Value Measurements Using Significant Level 3 Inputs
(In millions)	Natural Gas Related Derivatives			Electricity Related Derivatives			Warrants			Total
Three Months Ended June 30, 2015
Balance at April 1, 2015	$	(319.6	)	$	(10.5	)	$	—		$	(330.1	)
Realized and unrealized gains (losses)
Recorded to income	(33.6		)	(4.8		)	—			(38.4		)
Recorded to regulatory assets—gas costs	(7.7		)	—			—			(7.7		)
Transfers out of Level 3	3.9			—			—			3.9
Purchases	—			3.9			—			3.9
Settlements	6.0			2.6			—			8.6
Balance at June 30, 2015	$	(351.0	)	$	(8.8	)	$	—		$	(359.8	)
Three Months Ended June 30, 2014
Balance at April 1, 2014	$	(432.3	)	$	(2.2	)	$	1.2		$	(433.3	)
Realized and unrealized gains (losses)
Recorded to income	(19.0		)	(2.3		)	(0.6		)	(21.9		)
Recorded to regulatory assets—gas costs	(15.9		)	—			—			(15.9		)
Transfers out of Level 3	1.7			—			—			1.7
Purchases	—			2.3			—			2.3
Settlements	4.9			0.5			—			5.4
Balance at June 30, 2014	$	(460.6	)	$	(1.7	)	$	0.6		$	(461.7	)
Nine Months Ended June 30, 2015
Balance at October 1, 2014	$	(294.7	)	$	(5.0	)	$	—		$	(299.7	)
Realized and unrealized gains (losses)
Recorded to income	(51.0		)	(15.3		)	—			(66.3		)
Recorded to regulatory assets—gas costs	(48.0		)	—			—			(48.0		)
Transfers into Level 3	5.4			—			—			5.4
Transfers out of Level 3	3.6			—			—			3.6
Purchases	—			7.3			—			7.3
Settlements	33.7			4.2			—			37.9
Balance at June 30, 2015	$	(351.0	)	$	(8.8	)	$	—		$	(359.8	)
Nine Months Ended June 30, 2014
Balance at October 1, 2013	$	(155.2	)	$	2.4		$	1.1		$	(151.7	)
Realized and unrealized gains (losses)
Recorded to income	(151.6		)	1.0			(0.5		)	(151.1		)
Recorded to regulatory assets—gas costs	(198.7		)	—			—			(198.7		)
Transfers out of Level 3	1.7			—			—			1.7
Purchases	—			3.7			—			3.7
Settlements	43.2			(8.8		)	—			34.4
Balance at June 30, 2014	$	(460.6	)	$	(1.7	)	$	0.6		$	(461.7	)

27

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

Washington Gas Light Company Reconciliation of Fair Value Measurements Using Significant Level 3 Inputs
(In millions)	Natural Gas Related Derivatives
Three Months Ended June 30, 2015
Balance at April 1, 2015	$	(299.8	)
Realized and unrealized gains (losses)
Recorded to income	(7.6		)
Recorded to regulatory assets—gas costs	(7.7		)
Transfers out of Level 3	2.8
Settlements	5.1
Balance at June 30, 2015	$	(307.2	)
Three Months Ended June 30, 2014
Balance at April 1, 2014	$	(382.6	)
Realized and unrealized gains (losses)
Recorded to income	(4.5		)
Recorded to regulatory assets—gas costs	(15.9		)
Transfers out of Level 3	1.7
Settlements	4.4
Balance at June 30, 2014	$	(396.9	)
Nine Months Ended June 30, 2015
Balance at October 1, 2014	$	(270.6	)
Realized and unrealized gains (losses)
Recorded to income	(30.3		)
Recorded to regulatory assets—gas costs	(48.0		)
Transfers into Level 3	5.4
Transfers out of Level 3	2.5
Settlements	33.8
Balance at June 30, 2015	$	(307.2	)
Nine Months Ended June 30, 2014
Balance at October 1, 2013	$	(133.6	)
Realized and unrealized gains (losses)
Recorded to income	(109.7		)
Recorded to regulatory assets—gas costs	(198.7		)
Transfers out of Level 3	1.7
Settlements	43.4
Balance at June 30, 2014	$	(396.9	)

Transfers between different levels of the fair value hierarchy may occur based on the level of observable inputs used to value the instruments from period to period. It is our policy to show both transfers into and out of the different levels of the fair value hierarchy at the fair value as of the beginning of the period. Transfers out of Level 3 during the three and nine months ended June 30, 2015 and 2014 were due to an increase in valuations using observable market inputs. Transfers into Level 3 during the nine months ended June 30, 2015 were due to an increase in unobservable market inputs used in valuations.

28

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

The table below sets forth the line items on the statements of income to which amounts are recorded for the three and nine months ended June 30, 2015 and 2014, respectively, related to fair value measurements using significant Level 3 inputs.

WGL Holdings, Inc. Realized and Unrealized Gains (Losses) Recorded to Income for Level 3 Measurements
(In millions)	Natural Gas Related Derivatives			Electricity Related Derivatives			Warrants			Total
Three Months Ended June 30, 2015
Operating revenues—non-utility	$	(22.3	)	$	(3.0	)	$	—		$	(25.3	)
Utility cost of gas	(7.6		)	—			—			(7.6		)
Non-utility cost of energy-related sales	(3.7		)	(1.8		)	—			(5.5		)
Total	$	(33.6	)	$	(4.8	)	$	—		$	(38.4	)
Three Months Ended June 30, 2014
Operating revenues—non-utility	$	(14.3	)	$	(5.6	)	$	—		$	(19.9	)
Utility cost of gas	(4.5		)	—			—			(4.5		)
Other income-net	—			—			(0.6		)	(0.6		)
Non-utility cost of energy-related sales	(0.2		)	3.3			—			3.1
Total	$	(19.0	)	$	(2.3	)	$	(0.6	)	$	(21.9	)
Nine Months Ended June 30, 2015
Operating revenues—non-utility	$	(20.7	)	$	21.0		$	—		$	0.3
Utility cost of gas	(30.3		)	—			—			(30.3		)
Non-utility cost of energy-related sales	—			(36.3		)	—			(36.3		)
Total	$	(51.0	)	$	(15.3	)	$	—		$	(66.3	)
Nine Months Ended June 30, 2014
Operating revenues—non-utility	$	(40.6	)	$	(30.1	)	$	—		$	(70.7	)
Utility cost of gas	(109.7		)	—			—			(109.7		)
Other income-net	—			—			(0.5		)	(0.5		)
Non-utility cost of energy-related sales	(1.3		)	31.1			—			29.8
Total	$	(151.6	)	$	1.0		$	(0.5	)	$	(151.1	)

Washington Gas Light Company Realized and Unrealized Gains (Losses) Recorded to Income for Level 3 Measurements
(In millions)	Natural Gas Related Derivatives
Three Months Ended June 30, 2015
Utility cost of gas	$	(7.6	)
Total	$	(7.6	)
Three Months Ended June 30, 2014
Utility cost of gas	$	(4.5	)
Total	$	(4.5	)
Nine Months Ended June 30, 2015
Utility cost of gas	$	(30.3	)
Total	$	(30.3	)
Nine Months Ended June 30, 2014
Utility cost of gas	$	(109.7	)
Total	$	(109.7	)

29

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

Unrealized gains (losses) attributable to derivative assets and liabilities measured using significant Level 3 inputs were recorded as follows, for the three and nine months ended June 30, 2015 and 2014, respectively.

WGL Holdings, Inc. Unrealized Gains (Losses) Recorded for Level 3 Measurements
(In millions)	Natural Gas Related Derivatives			Electricity Related Derivatives			Warrants			Total
Three Months Ended June 30, 2015
Recorded to income
Operating revenues—non-utility	$	(21.3	)	$	0.8		$	—		$	(20.5	)
Utility cost of gas	(1.8		)	—			—			(1.8		)
Non-utility cost of energy-related sales	(5.6		)	2.5			—			(3.1		)
Recorded to regulatory assets—gas costs	(9.2		)	—			—			(9.2		)
Total	$	(37.9	)	$	3.3		$	—		$	(34.6	)
Three Months Ended June 30, 2014
Recorded to income
Operating revenues—non-utility	$	(13.9	)	$	(5.8	)	$	—		$	(19.7	)
Utility cost of gas	(6.0		)	—			—			(6.0		)
Non-utility cost of energy-related sales	(0.1		)	5.3			—			5.2
Other income-net	—			—			(0.6		)	(0.6		)
Recorded to regulatory assets—gas costs	(17.6		)	—			—			(17.6		)
Total	$	(37.6	)	$	(0.5	)	$	(0.6	)	$	(38.7	)
Nine Months Ended June 30, 2015
Recorded to income
Operating revenues—non-utility	$	(17.6	)	$	21.7		$	—		$	4.1
Utility cost of gas	(23.1		)	—			—			(23.1		)
Non-utility cost of energy-related sales	(1.7		)	(31.5		)	—			(33.2		)
Recorded to regulatory assets—gas costs	(38.1		)	—			—			(38.1		)
Total	$	(80.5	)	$	(9.8	)	$	—		$	(90.3	)
Nine Months Ended June 30, 2014
Recorded to income
Operating revenues—non-utility	$	(44.6	)	$	(39.3	)	$	—		$	(83.9	)
Utility cost of gas	(100.4		)	—			—			(100.4		)
Non-utility cost of energy-related sales	3.3			35.8			—			39.1
Other income-net	—			—			(0.5		)	(0.5		)
Recorded to regulatory assets—gas costs	(190.7		)	—			—			(190.7		)
Total	$	(332.4	)	$	(3.5	)	$	(0.5	)	$	(336.4	)

30

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

Washington Gas Light Company Unrealized Gains (Losses) Recorded for Level 3 Measurements
(In millions)	Natural Gas Related Derivatives
Three Months Ended June 30, 2015
Recorded to income - utility cost of gas	$	(1.8	)
Recorded to regulatory assets—gas costs	(9.2		)
Total	$	(11.0	)
Three Months Ended June 30, 2014
Recorded to income - utility cost of gas	$	(6.0	)
Recorded to regulatory assets—gas costs	(17.6		)
Total	$	(23.6	)
Nine Months Ended June 30, 2015
Recorded to income - utility cost of gas	$	(23.1	)
Recorded to regulatory assets—gas costs	(38.1		)
Total	$	(61.2	)
Nine Months Ended June 30, 2014
Recorded to income - utility cost of gas	$	(100.4	)
Recorded to regulatory assets—gas costs	(190.7		)
Total	$	(291.1	)

The following table presents the carrying amounts and estimated fair values of our financial instruments at June 30, 2015 and September 30, 2014.

WGL Holdings, Inc. Fair Value of Financial Instruments
	June 30, 2015				September 30, 2014
(In millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Money market funds(a)	$	74.6	$	74.6	$	9.7	$	9.7
Other short-term investments(a)	$	1.0	$	1.0	$	—	$	—
Commercial paper (b)	$	156.0	$	156.0	$	453.5	$	453.5
Long-term debt(c)	$	950.5	$	1,033.5	$	679.2	$	809.3

Washington Gas Light Company Fair Value of Financial Instruments
	June 30, 2015				September 30, 2014
(In millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Money market funds(a)	$	70.4	$	70.4	$	4.3	$	4.3
Other short-term investments(a)	$	1.0	$	1.0	$	—	$	—
Commercial paper (b)	$	—	$	—	$	89.0	$	89.0
Long-term debt(c)	$	702.2	$	795.9	$	679.2	$	809.3

^(a)  Balance is located in cash and cash equivalents in the accompanying balance sheets. These amounts may be offset by outstanding checks.

^(b)  Balance is located in notes payable in the accompanying balance sheets.

^(c)  Less current maturities and unamortized discounts.

31

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

Our money market funds are Level 1 valuations and their carrying amount approximates fair value. Other short-term investments are primarily overnight investment accounts; therefore, their carrying amount approximates fair value based on Level 2 inputs. The maturity of our commercial paper outstanding at both June 30, 2015 and September 30, 2014 is under 30 days. Due to the short term nature of these notes, the carrying cost of our commercial paper approximates fair value using Level 2 inputs. Neither WGL’s nor Washington Gas’ long-term debt is actively traded. The fair value of long-term debt was estimated based on the quoted market prices of the U.S. Treasury issues having a similar term to maturity, adjusted for the credit quality of the debt issuer, WGL or Washington Gas. Our long-term debt fair value measurement is classified as Level 3.

Non Recurring Basis

During the nine months ended June 30, 2015, Washington Gas Resources recorded an impairment charge of its investment in ASDHI to its fair value using the income approach. The amount of the impairment was equivalent to the amount of the carrying value of $5.6 million and was due to management’s assumption of the current valuation and expected return from the investment. The fair value of this investment was a Level 3 measurement.

NOTE 10. OPERATING SEGMENT REPORTING

We have four reportable operating segments: regulated utility, retail energy-marketing, commercial energy systems and midstream energy services. The division of these segments into separate revenue generating components is based upon regulation, products and services. Our chief operating decision maker is our Chief Executive Officer. During the first quarter of 2015, our chief operating decision maker began evaluating segment performance based on Earnings Before Interest and Taxes (EBIT). EBIT is defined as earnings before interest and taxes from continuing operations. Items we do not include in EBIT are interest expense, intercompany financing activity, dividends on Washington Gas preferred stock, and income taxes. EBIT includes transactions between reportable segments. We also evaluate our operating segments based on other relevant factors, such as penetration into their respective markets and return on equity.

Our four segments are summarized below.

• Regulated Utility – The regulated utility segment is our core business. It consists of Washington Gas and Hampshire. Washington Gas provides regulated gas distribution services (including the sale and delivery of natural gas) to end use customers and natural gas transportation services to an unaffiliated natural gas distribution company in West Virginia under a Federal Energy Regulatory Commission (FERC) approved interstate transportation service operating agreement. Hampshire provides regulated interstate natural gas storage services to Washington Gas under a FERC approved interstate storage service tariff.

• Retail Energy-Marketing – The retail energy-marketing segment consists of WGL Energy Services, which sells natural gas and electricity directly to retail customers in competition with regulated utilities and unregulated gas and electricity marketers.

• Commercial Energy Systems – The commercial energy systems segment consists of WGL Energy Systems which provides clean and energy efficient solutions including commercial solar, energy efficiency and combined heat and power projects and other distributed generation solutions to government and commercial clients. In addition, this segment comprises the operations of WGSW, a holding company formed to invest in alternative energy assets.

• Midstream Energy Services – The midstream energy services segment consists of WGL Midstream, which engages in acquiring, investing in, managing and optimizing natural gas storage and transportation assets.

Activities and transactions that are not significant enough on a stand-alone basis to warrant treatment as an operating segment, and that do not fit into one of our four operating segments, are aggregated as “Other Activities” in the Operating Segment Financial Information presented below. Administrative and business development activity costs associated with WGL and Washington Gas Resources are included in “Other Activities”.

32

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

The following tables present operating segment information for the three and nine months ended June 30, 2015 and 2014.

Operating Segment Financial Information
(In thousands)	Operating Revenues(a)			Depreciation and Amortization			Equity in Earnings of Unconsolidated Affiliates		EBIT			Total Assets			Capital Expenditures		Equity Method Investments
Three Months Ended June 30, 2015
Regulated utility	$	190,345		$	27,740		$	—	$	(6,262	)	$	4,113,166		$	75,413	$	—
Retail energy-marketing	268,249			151			—		16,654			464,086			—		—
Commercial energy systems	14,674			2,787			544		3,750			613,124			27,271		64,323
Midstream energy services	(25,801		)	31			718		(26,607		)	203,591			85		56,967
Other activities	—			—			—		(970		)	106,861			—		—
Eliminations(b)	(6,294		)	(13		)	—		(541		)	(492,363		)	—		—
Total consolidated	$	441,173		$	30,696		$	1,262	$	(13,976	)	$	5,008,465		$	102,769	$	121,290
Three Months Ended June 30, 2014
Regulated utility	$	197,752		$	25,840		$	—	$	4,456		$	3,809,747		$	76,073	$	—
Retail energy-marketing	275,339			204			—		1,286			387,990			5		—
Commercial energy systems	14,260			1,611			733		5,012			459,509			18,171		68,309
Midstream energy services	(15,869		)	31			85		(16,806		)	181,880			—		22,426
Other activities	—			—			—		(2,391		)	224,220			—		413
Eliminations(b)	(3,982		)	(64		)	—		(532		)	(502,662		)	—		—
Total consolidated	$	467,500		$	27,622		$	818	$	(8,975	)	$	4,560,684		$	94,249	$	91,148
Nine Months Ended June 30, 2015
Regulated utility	$	1,193,232		$	81,958		$	—	$	238,645		$	4,113,166		$	235,707	$	—
Retail energy-marketing	1,003,339			470			—		39,185			464,086			5		—
Commercial energy systems	35,745			7,693			1,623		4,731			613,124			81,246		64,323
Midstream energy services	(17,997		)	93			1,865		(23,343		)	203,591			85		56,967
Other activities	—			—			750		(8,915		)	106,861			—		—
Eliminations(b)	(22,176		)	(55		)	—		(592		)	(492,363		)	—		—
Total consolidated	$	2,192,143		$	90,159		$	4,238	$	249,711		$	5,008,465		$	317,043	$	121,290
Nine Months Ended June 30, 2014
Regulated utility	$	1,304,975		$	76,945		$	—	$	158,444		$	3,809,747		$	181,821	$	—
Retail energy-marketing	1,035,711			558			—		5,186			387,990			93		—
Commercial energy systems	27,013			4,255			1,496		5,961			459,509			59,536		68,309
Midstream energy services	(21,938		)	93			355		(29,410		)	181,880			—		22,426
Other activities	—			—			—		(10,227		)	224,220			—		413
Eliminations(b)	(23,714		)	(335		)	—		110			(502,662		)	—		—
Total consolidated	$	2,322,047		$	81,516		$	1,851	$	130,064		$	4,560,684		$	241,450	$	91,148

(a) Operating revenues are reported gross of revenue taxes. Revenue taxes of both the regulated utility and the retail energy-marketing segments include gross receipt taxes. Revenue taxes of the regulated utility segment also include public service commission fees, franchise fees and energy taxes. Operating revenue amounts in the “Eliminations” row represent total intersegment revenues associated with sales from the regulated utility segment to the retail energy-marketing segment. Midstream Energy Services’ cost of energy related sales is netted with its gross revenues.

(b) Intersegment eliminations include any mark-to market valuations associated with trading activities between WGL Midstream and WGL Energy Services, intercompany loans and a timing difference between Commercial Energy Systems’ recognition of revenue for the sale of Renewable Energy Credits (RECs) to Retail Energy-Marketing and Retail Energy-Marketing’s recognition of the associated expense. Retail Energy-Marketing has recorded a portion of the REC’s purchased as inventory to be used in future periods at which time they will be expensed.

33

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

The following table provides a reconciliation from EBIT to net income applicable to common stock.

	Three Months Ended June 30,						Nine Months Ended June 30,
(In thousands)	2015			2014			2015		2014
Total consolidated EBIT	$	(13,976	)	$	(8,975	)	$	249,711	$	130,064
Interest expense	13,140			9,503			38,704		28,020
Income (loss) before income taxes	(27,116		)	(18,478		)	211,007		102,044
Income tax expense (benefit)	(11,756		)	(6,868		)	80,364		33,152
Net income (loss)	(15,360		)	(11,610		)	130,643		68,892
Dividends on Washington Gas Light Company preferred stock	330			330			990		990
Net income (loss) applicable to common stock	$	(15,690	)	$	(11,940	)	$	129,653	$	67,902

NOTE 11. OTHER INVESTMENTS

When determining how to account for our interests in other legal entities, WGL first evaluates if we are required to apply the variable interest entity (VIE) model to the entity, otherwise the entity is evaluated under the voting interest model.

Under the VIE model, we have a controlling financial interest in a VIE (i.e. are the primary beneficiary) when we have current or potential rights that give us the power to direct the activities of a VIE that most significantly impact the VIE’s economic performance combined with a variable interest that gives us the right to receive potentially significant benefits or the obligation to absorb potentially significant losses. When changes occur to the design of an entity, we reconsider whether it is subject to the VIE model. We continuously evaluate whether we have a controlling financial interest in a VIE.

Under the voting interest model, we generally have a controlling financial interest in an entity where we currently hold, directly or indirectly, more than 50% of the voting rights or where we exercise control through substantive participating rights. However, we consider substantive rights held by other partners in determining if we hold a controlling financial interest, and in some cases, despite owning more than 50% of the common stock of an investee, an evaluation of our rights results in the determination that we do not have a controlling financial interest. We reevaluate whether we have a controlling financial interest in these entities when our voting or substantive participating rights change.

Unconsolidated affiliates are unconsolidated VIEs and other entities evaluated under the voting interest method in which we do not have a controlling financial interest, but over which we have varying degrees of influence. Where we have significant influence, the affiliates are accounted for as equity method investments. Where we do not have significant influence, the affiliates are accounted for under the cost method. Investments in, and advances to, affiliated companies are presented on a one-line basis in the caption “Investments in unconsolidated affiliates” on our Consolidated Balance Sheet.

WGL uses the Hypothetical Liquidation at Book Value (HLBV) methodology for certain equity method investments when the capital structure of the equity investment results in different liquidation rights and priorities than what is reflected by the underlying percentage ownership interests as defined by an equity investment agreement. For investments accounted for under the HLBV method, simply applying the percentage ownership interest to GAAP net income in order to determine earnings or losses does not accurately represent the income allocation and cash flow distributions that will ultimately be received by the investors. The equity investment agreements for ASD Solar, LP (ASD), Meade Pipeline Co LLC (Meade) and Mountain Valley Pipeline, LLC (Mountain Valley) have liquidation rights and priorities that are sufficiently different from the ownership percentages that the HLBV method was deemed appropriate. The calculation may vary in its complexity depending on the capital structure and the tax considerations for the investments.

WGL applies HLBV using a balance sheet approach. A calculation is prepared at each balance sheet date to determine the amount that WGL would receive if an equity investment entity were to liquidate all of its assets (as valued in accordance with GAAP) and distribute that cash to the investors based on the contractually defined liquidation priorities. The difference between the calculated liquidation distribution amounts at the beginning and the end of the reporting period is WGL’s share of the earnings or losses from the equity investment for the period.

Variable Interest Entities

WGL has a variable interest in four investments that qualify as VIEs:

• Meade,

• SunEdison,

• Nextility and

34

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

• ASD.

WGL previously had a variable interest in Crab Run; however, this investment was sold during the nine months ended June 30, 2015. Accordingly, during the nine months ended June 30, 2015, the carrying amount of the investment was removed and WGL recognized a gain of $0.7 million, which was recorded in "Equity in earnings of unconsolidated affiliates" on WGL's statements of income.

WGL and its subsidiaries are not the primary beneficiary for any of the above VIEs, therefore we have not consolidated any of the VIE entities. At June 30, 2015, the nature of WGL’s involvement with these investments lacks the characteristics of a controlling financial interest. WGL does not have control over any of the VIEs’ activities that are economically significant to the VIEs. In addition, WGL does not have the obligation to absorb expected losses or the right to receive expected gains that could be significant to the VIE.

Meade

In 2014, WGL through its subsidiary, WGL Midstream, entered into a limited liability company agreement and formed Meade, a Delaware limited liability company with COG Holdings LLC, Vega Midstream MPC LLC and River Road Interests LLC. Meade was formed to partner with Transcontinental Gas Pipeline Company, LLC (Williams) to invest in a regulated pipeline project called Central Penn Pipeline (Central Penn). The Central Penn will be an approximately 177-mile pipeline originating in Susquehanna County, Pennsylvania and extending to Lancaster County, Pennsylvania that will have the capacity to transport and deliver up to approximately 1.7 million dekatherms per day of natural gas.

WGL Midstream plans to invest an estimated $412.0 million for a 55% interest in Meade. WGL Midstream joins COG Holdings LLC (20% share), Vega Midstream MPC LLC (15% share) and River Road Interests LLC (10% share) in Meade. Meade is accounted for under the HLBV equity method of accounting, and any profits and losses are included in “Equity in earnings of unconsolidated affiliates” in the accompanying Consolidated Statement of Income and are added to or subtracted from the carrying amount of WGL’s investment balance. At June 30, 2015 and September 30, 2014, WGL Midstream held a $21.7 million and $5.8 million, respectively, equity method investment in Meade.

Our maximum financial exposure includes contributions and guarantees on behalf of WGL Midstream. Our maximum exposure to loss at June 30, 2015 was $59.4 million, which represents the minimum funding requirements owed to Williams under the Construction and Ownership Agreement should Meade terminate its agreement with Williams early.

SunEdison/Nextility

WGSW is party to two agreements to fund residential and commercial retail solar energy installations with two separate, privately held companies. WGSW has a master purchase agreement and master lease agreement with SunEdison, Inc. (SunEdison), and Nextility, Inc. (Nextility) for sale/leaseback arrangements for residential and commercial solar systems.

Our agreements with SunEdison and Nextility are accounted for as direct financing leases. WGSW records associated interest in the financing leases in “Other income (expenses)-net” line in the accompanying Consolidated Statement of Income. WGSW held a $29.1 million and $19.9 million combined investment in direct financing leases at June 30, 2015 and September 30, 2014, respectively, of which $3.3 million and $1.7 million are current receivables recorded in “Accounts Receivable” in the accompanying Consolidated Balance Sheets at June 30, 2015 and September 30, 2014, respectively.

Minimum future lease payments receivable under direct financing leases over the next five fiscal years and thereafter are as follows:

Minimum Payments Receivable for Direct Financing Leases
(In millions)
Remainder of 2015	$	2.4
2016	2.5
2017	2.4
2018	2.3
2019	2.2
Thereafter	22.6
Total	$	34.4

Minimum payments receivable exclude $7.7 million of residual values and $2.6 million in tax credits. Associated with these investments, WGSW holds $15.6 million of unearned income on its balance sheet. The initial direct costs (incurred in FY 2012) associated with these investments was $0.7 million.

35

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

Our maximum financial exposure from solar agreements is limited to WGSW's lease payment receivables and investment contributions made to these companies. All additional future committed contributions are contingent on the projects meeting required criteria. Our exposure is offset by the owned physical assets received as part of the transaction and the quick economic return for the investment through the investment tax credit/treasury grant proceeds and accelerated depreciation.

ASD

In addition to SunEdison and Nextility, WGSW is also a limited partner in ASD, a limited partnership formed to own and operate a portfolio of residential solar projects, primarily rooftop photovoltaic power generation systems. As a limited partner, WGSW provided funding to the partnership but does not have power to direct the activities that most significantly affect the operations and economic performance of the entity. In January 2014, the funding commitment period expired for the partnership. WGSW’s maximum financial exposure is limited to its contributions made to the partnership.

Our investment in ASD is accounted for under the HLBV equity method of accounting; any profits and losses are included in “Equity in earnings of unconsolidated affiliates” in the accompanying Consolidated Statement of Income and are added to or subtracted from the carrying amount of WGSW’s investment balance. At June 30, 2015 and September 30, 2014, WGSW held a $64.3 million and $66.8 million, respectively, equity method investment in ASD.

ASD is consolidated by its general partner, Solar Direct LLC. Solar Direct LLC is a wholly owned subsidiary of American Solar Direct Inc. (ASDI). At June 30, 2015, the carrying amount of WGSW’s investment in ASD exceeded the amount of the underlying equity in net assets by $35.9 million due to WGSW recording additions to its investment in ASD’s net assets at fair value of contributions in accordance with GAAP. This basis difference is being amortized over the life of the assets.

Non-VIE Investments

ASDHI

At September 30, 2014, Washington Gas Resources held a $5.6 million investment in American Solar Direct Holdings Inc. (ASDHI) consisting of warrants and preferred stock. During the nine months ended June 30, 2015, Washington Gas Resources impaired its entire investment in ASDHI by its carrying value of $5.6 million based on management’s assumption of the current valuation and expected return from the investment.

Constitution

In 2013, WGL Midstream invested in Constitution Pipeline Company, LLC (Constitution). WGL Midstream will invest an estimated aggregate amount of $79.0 million in the project for a 10% share in the pipeline venture over the term of the agreement. At June 30, 2015, WGL Midstream had invested $26.4 million in Constitution. Other investors in the project include Williams Partners L.P. (41% share), Cabot Oil and Gas Corporation (25% share) and Piedmont Natural Gas (24% share) in the project. This natural gas pipeline venture will transport natural gas from the Marcellus region in northern Pennsylvania to major northeastern markets. Constitution is accounted for under the equity method of accounting; any profits and losses are included in “Equity in earnings of unconsolidated affiliates” in the accompanying Consolidated Statement of Income and are added to or subtracted from the carrying amount of WGL’s investment balance. The equity method is considered appropriate because Constitution is an LLC with specific ownership accounts and ownership between five and fifty percent resulting in WGL Midstream maintaining a more than minor influence over the partnership operating and financing policies. WGL Midstream held a $29.5 million equity method investment in Constitution at June 30, 2015.

At June 30, 2015, the maximum financial exposure is equivalent to total capital contributions made in Constitution on behalf of WGL Midstream, which was $26.4 million.

Mountain Valley Pipeline

In March 2015, WGL Midstream acquired a 7% equity interest in Mountain Valley Pipeline, LLC (Mountain Valley).

The proposed pipeline to be developed, constructed, owned and operated by Mountain Valley, will transport approximately 2.0 million dekatherms of natural gas per day from a new interconnect with EQT Corporation's Equitrans system, near the MarkWest Mobley plant in Smithfield, West Virginia to Transcontinental Gas Pipeline Company LLC's Station 165 in Pittsylvania County, Virginia.

WGL Midstream expects to invest, in scheduled capital contributions through the in-service date of the pipeline, its pro rata share (based on its 7% equity interest) of project costs, an estimated aggregate amount of approximately $230 to $245 million. WGL Midstream held a $5.9 million equity method investment in Mountain Valley at June 30, 2015.

Our maximum financial exposure includes guarantees on behalf of WGL Midstream and another partner in the venture. WGL's maximum exposure to loss due to the provided guarantees was $20.0 million at June 30, 2015 which represents a $14.0 million minimum funding requirement for WGL Midstream and the guarantee on behalf of one of the other partners.

36

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

In addition, WGL Midstream entered into an agreement to finance future capital commitments of one of the other partners in the venture for an estimated aggregate amount of approximately $96 to $105 million, which represents the estimated total funding requirements for that partner's 3% ownership interest in the joint venture, inclusive of the minimum funding requirement. WGL Midstream has provided funding of $2.5 million as of June 30, 2015 related to this agreement.

The balance sheet location of the investments discussed in this footnote at June 30, 2015 and September 30, 2014 are as follows:

WGL Holdings, Inc. Balance Sheet Location of Other Investments
As of June 30, 2015 (in millions)	VIEs		Non-VIEs			Total
Assets
Investments in unconsolidated affiliates	$	85.9	$	35.4		$	121.3
Investments in direct financing leases, capital leases	25.8		—			25.8
Accounts receivable	3.3		2.5		(a)	5.8
Total assets	$	115.0	$	37.9		$	152.9
As of September 30, 2014 (in millions)
Assets
Investments in unconsolidated affiliates	$	72.6	$	27.9		$	100.5
Investments in direct financing leases, capital leases	18.2		—			18.2
Accounts receivable	1.7		—			1.7
Total assets	$	92.5	$	27.9		$	120.4

^(a) Represents the financing provided to another partner in Mountain Valley to fund its capital commitment. Acquired ownership interest represents the collateral for repayment of the financing.

The income statement location of the investments discussed in this footnote for the three and nine months ended June 30, 2015 and 2014 are as follows:

WGL Holdings, Inc. Income Statement Location of Other Investments
(In millions)	VIEs		Non-VIEs		Total		VIEs		Non-VIEs			Total
	Three Months Ended   June 30, 2015						Nine Months Ended   June 30, 2015
Equity in earnings of unconsolidated affiliates	$	0.8	$	0.5	$	1.3	$	2.4	$	1.8		$	4.2
Depreciation and amortization	0.1		—		0.1		0.2		—			0.2
Other income (expenses)—net	1.0		—		1.0		2.4		(5.6		)	(3.2		)
Net income	$	1.7	$	0.5	$	2.2	$	4.6	$	(3.8	)	$	0.8
	Three Months Ended   June 30, 2014						Nine Months Ended   June 30, 2014
Equity in earnings of unconsolidated affiliates	$	0.5	$	0.3	$	0.8	$	1.3	$	0.6		$	1.9
Depreciation and amortization	—		—		—		0.1		—			0.1
Other income—net	0.6		—		0.6		1.9		—			1.9
Net income	$	1.1	$	0.3	$	1.4	$	3.1	$	0.6		$	3.7

NOTE 12. RELATED PARTY TRANSACTIONS

WGL and its subsidiaries engage in transactions in the ordinary course of business. Inter-company transactions and balances have been eliminated from the consolidated financial statements of WGL, except as described below. Washington Gas provides accounting, treasury, legal and other administrative and general support to affiliates, and files consolidated tax returns that include affiliated taxable transactions. Washington Gas bills its affiliates in accordance with regulatory requirements for the actual cost of providing these services, which approximates their market value. To the extent such billings are not paid, they are reflected in “Receivables from associated companies” on Washington Gas’ balance sheets. Washington Gas assigns or allocates these costs directly to its affiliates and, therefore, does not recognize revenues or expenses associated with providing these services.

In connection with billing for unregulated third party marketers and with other miscellaneous billing processes, Washington Gas collects cash on behalf of affiliates and transfers the cash in a reasonable time period. Cash collected by Washington Gas

37

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

on behalf of its affiliates but not transferred is recorded in “Payables to associated companies” on Washington Gas’ balance sheets. The following table presents the receivables and payables from associated companies as of June 30, 2015 and September 30, 2014.

Washington Gas Light Company Receivables / Payables from Associated Companies
(In millions)	June 30, 2015		September 30, 2014
Receivables from Associated Companies	$	4.8	$	4.8
Payables to Associated Companies	$	66.9	$	54.7

Washington Gas provides gas balancing services related to storage, injections, withdrawals and deliveries to all energy marketers participating in the sale of natural gas on an unregulated basis through the customer choice programs that operate in its service territory. These balancing services include the sale of natural gas supply commodities related to various peaking arrangements contractually supplied to Washington Gas and then partially allocated and assigned by Washington Gas to the energy marketers, including WGL Energy Services. Washington Gas records revenues for these balancing services pursuant to tariffs approved by the appropriate regulatory bodies. These related party amounts related to balancing services provided to WGL Energy Services have been eliminated in the consolidated financial statements of WGL. The following table shows the amounts Washington Gas charged WGL Energy Services for balance services.

Washington Gas Light Company-Gas Balancing Service Charges
	Three Months Ended June 30,				Nine Months Ended June 30,
(In millions)	2015		2014		2015		2014
Gas balancing service charge	$	5.3	$	2.8	$	19.8	$	21.0

As a result of these balancing services, an imbalance is created for volumes of natural gas received by Washington Gas that are not equal to the volumes of natural gas delivered to customers of the energy marketers. WGL Energy Services recognized accounts payable to Washington Gas in the amount of $7.0 million and an accounts receivable from Washington Gas in the amount of $0.02 million at June 30, 2015 and September 30, 2014, respectively, related to an imbalance in gas volumes. Due to regulatory treatment, these payables and receivables are not eliminated in the consolidated financial statements of WGL. Refer to Note 1—Accounting Policies of the Notes to Consolidated Financial Statements of the combined Annual Report on Form 10-K for the fiscal year ended September 30, 2014 for further discussion of these imbalance transactions.

Washington Gas participates in a Purchase of Receivables (POR) program as approved by the PSC of MD, whereby it purchases receivables from participating energy marketers at approved discount rates. In addition, WGL Energy Services participates in POR programs with certain Maryland and Pennsylvania utilities, whereby it sells its receivables to various utilities, including Washington Gas, at approved discount rates. The receivables purchased by Washington Gas are included in “Accounts receivable” in the accompanying balance sheet. Any activity between Washington Gas and WGL Energy Services related to the POR program has been eliminated in the accompanying financial statements for WGL. At June 30, 2015 and September 30, 2014, Washington Gas had balances of $21.2 million and $7.7 million, respectively, of purchased receivables from WGL Energy Services.

38

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

NOTE 13. COMMITMENTS AND CONTINGENCIES

REGULATED UTILITY OPERATIONS

The following table summarizes the minimum contractual payments that Washington Gas will make under its pipeline transportation, storage and peaking contracts, as well as minimum contractual payments to purchase natural gas for the next five fiscal years and thereafter.

Washington Gas Contract Minimums
(In millions)	Pipeline Contracts(a)		Gas Purchase Commitments(b)
Remainder of 2015	$	55.4	$	42.4
2016	218.7		359.6
2017	210.5		465.4
2018	211.3		460.9
2019	202.7		453.2
Thereafter	1,172.5		5,577.2
Total	$	2,071.1	$	7,358.7

^(a)  Represents minimum payments for natural gas transportation, storage and peaking contracts that have expiration dates through fiscal year 2031.

^(b)  Includes known and reasonably likely commitments to purchase natural gas. Cost estimates are based on market prices at June 30, 2015.

REGULATORY CONTINGENCIES

Certain legal and administrative proceedings incidental to our business, including regulatory contingencies, involve WGL and/or its subsidiaries. In our opinion, we have recorded an adequate provision for probable losses or refunds to customers for regulatory contingencies related to these proceedings.

Virginia Gas Reserves. In the 2014 Session, the General Assembly of the Commonwealth of Virginia amended Title 56 of the Virginia Code. The legislative provisions are intended to encourage regulated utilities to invest in natural gas reserves, upstream pipelines and facilities that are reasonably expected to benefit customers by lowering costs, reducing volatility or lowering the utility’s supply risk. A regulated utility company can obtain the recovery through its rates charged to customers for the entire incurred cost, including the return of and a return on the investment in reserves, as well as all operating costs.

Pursuant to the legislation, on May 6, 2015, WGL entered into a 20-year agreement with Energy Corporation of America (ECA) to acquire natural gas reserves through non-operating working interests in 25 producing wells located in Pennsylvania's Appalachian Basin for $126 million.

The purchase of the reserves is conditional upon approval by the Commonwealth of Virginia's State Corporation Commission (SCC of VA). Washington Gas filed an application with the SCC of VA on May 12, 2015, for approval of the gas reserves purchase agreement with ECA. Under a procedural schedule established by the SCC of VA to consider the application, a public hearing is scheduled on September 30, 2015. Under the law, the SCC of VA must issue a final decision on the application within 180 days, or by November 8, 2015.

NON-UTILITY OPERATIONS

On November 30, 2014, WGL through its subsidiary, WGL Midstream, entered into a gas sale and purchase, and capacity agreement with GAIL Global (USA) LNG LLC, a subsidiary of GAIL (India) Limited, under which WGL Midstream has agreed to sell and deliver a minimum of 340,000 dekatherms per day and up to 430,000 dekatherms per day of natural gas, for a term of 20 years from the in-service date of the export facility. The contract price is based on index pricing, but certain gas sales will occur at a market price per dekatherm of gas based on the estimate of prices prevailing at designated delivery points.

WGL Midstream will make deliveries using transportation capacity released by GAIL through an asset management arrangement. On March 10, 2015, WGL Midstream entered into gas purchase commitments to buy 500,000 dekatherms of natural gas per day at index based prices for a 20-year term. We will also be a shipper on the Mountain Valley Pipeline. These commitments were executed in conjunction with the investment in Mountain Valley.

39

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

As a result of these agreements, purchase commitments for WGL Midstream have increased as reflected in the table below. The following table summarizes the minimum commitments and contractual obligations of WGL Energy Services and WGL Midstream for the next five fiscal years and thereafter.

Contract Minimums
	WGL Energy Services						WGL Midstream
(In millions)	Gas Purchase Commitments(a)		Pipeline Contracts(b)		Electric Purchase Commitments(c)		Gas Purchase Commitments(d)		Pipeline Contracts(b)		Total
Remainder of 2015	$	37.1	$	1.5	$	153.3	$	20.9	$	5.9	$	218.7
2016	146.3		2.2		418.1		258.9		20.4		845.9
2017	57.3		2.0		171.3		389.5		18.2		638.3
2018	6.7		1.5		36.5		1,217.4		15.4		1,277.5
2019	—		0.8		2.0		1,747.8		60.7		1,811.3
Thereafter	—		1.7		0.5		35,647.5		1,093.2		36,742.9
Total	$	247.4	$	9.7	$	781.7	$	39,282.0	$	1,213.8	$	41,534.6

^(a)  Represents fixed price commitments with city gate equivalent deliveries.

^(b)  Represents minimum payments for natural gas transportation and storage contracts that have expiration dates through fiscal year 2044.

^(c)  Represents electric purchase commitments that are based on existing fixed price and fixed volume contracts. Includes $18.2 million of commitments related to renewable energy credits.

^(d)  Includes known and reasonably likely commitments to purchase natural gas. Cost estimates are based on forward market prices as of June 30, 2015.

FINANCIAL GUARANTEES

WGL has guaranteed payments primarily for certain purchases of natural gas and electricity on behalf of WGL Energy Services and for certain purchase commitments on behalf of WGL Midstream. At June 30, 2015, these guarantees totaled $224.8 million and $311.8 million for WGL Energy Services and WGL Midstream, respectively. At June 30, 2015, WGL also had guarantees on behalf of other subsidiaries totaling $9.1 million. The amount of such guarantees is periodically adjusted to reflect changes in the level of financial exposure related to these commitments. For all of our financial guarantees, WGL may cancel any or all future obligations upon written notice to the counterparty, but WGL would continue to be responsible for the obligations created under the guarantees prior to the effective date of the cancellation. WGL has also guaranteed payments for certain of our external partners. At June 30, 2015, these guarantees totaled $8.1 million and the fair value of these guarantees was insignificant.

40

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

NOTE 14. PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS

The following table shows the components of net periodic benefit costs (income) recognized in our financial statements during the three and nine months ended June 30, 2015 and 2014.

Components of Net Periodic Benefit Costs (Income)
	Three Months Ended June 30,
	2015						2014
(In millions)	Pension Benefits			Health and Life Benefits			Pension Benefits			Health and Life Benefits
Service cost	$	3.9		$	1.8		$	3.5		$	1.6
Interest cost	9.7			3.7			10.1			3.8
Expected return on plan assets	(11.2		)	(5.2		)	(10.2		)	(4.9		)
Amortization of prior service cost (credit)	0.1			(3.8		)	0.1			(3.8		)
Amortization of actuarial loss	4.7			1.1			4.2			1.6
Net periodic benefit cost (income)	7.2			(2.4		)	7.7			(1.7		)
Amount allocated to construction projects	(1.2		)	0.5			(1.1		)	0.1
Amortization of regulatory asset/liability—net	1.8			(0.1		)	1.7			0.2
Amount charged (credited) to expense	$	7.8		$	(2.0	)	$	8.3		$	(1.4	)
	Nine Months Ended June 30,
	2015						2014
Service cost	$	11.6		$	5.3		$	10.5		$	5.9
Interest cost	29.3			11.0			30.3			14.8
Expected return on plan assets	(33.5		)	(15.6		)	(30.7		)	(14.4		)
Amortization of prior service cost (credit)	0.2			(11.4		)	0.2			(5.8		)
Amortization of actuarial loss	14.1			3.3			12.6			3.5
Net periodic benefit cost (income)	21.7			(7.4		)	22.9			4.0
Amount allocated to construction projects	(3.4		)	1.5			(3.1		)	(0.7		)
Amortization of regulatory asset/liability—net	5.3			(0.2		)	5.3			0.4
Amount charged (credited) to expense	$	23.6		$	(6.1	)	$	25.1		$	3.7

Amounts included in the line item “Amortization of regulatory asset/liability—net,” as shown in the table above, represent the amortization of previously unrecovered costs of the applicable pension benefits or the health and life benefits as approved in the District of Columbia. These balances are being amortized over a five year period.

41

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 1—Financial Statements (continued)

Notes to Condensed Consolidated Financial Statements (Unaudited)

NOTE 15. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

The following tables show the changes in accumulated other comprehensive income (loss) for WGL and Washington Gas by component for the three and nine months ended June 30, 2015 and 2014.

WGL Holdings, Inc. Changes in Accumulated Other Comprehensive Loss by Component
(In thousands)	Three Months Ended June 30,						Nine Months Ended June 30,
	2015			2014			2015			2014
Beginning Balance	$	(11,643	)	$	(10,969	)	$	(7,961	)	$	(11,048	)
Qualified cash flow hedging instruments(a)	49			—			(7,994		)	—
Change in prior service cost (credit) (b)	(170		)	6,204			(511		)	6,135
Amortization of actuarial loss (b)	529			404			1,503			604
Current-period other comprehensive income (loss)	408			6,608			(7,002		)	6,739
Income tax expense (benefit) related to other comprehensive income (loss)	163			2,622			(3,565		)	2,674
Ending Balance	$	(11,398	)	$	(6,983	)	$	(11,398	)	$	(6,983	)

(a) Cash flow hedging instruments represent interest rate swaps agreements on debt issuances. Refer to Note 8- Derivative and weather-related instruments for further discussion of the interest rate swap agreements.

(b) These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost. Refer to Note 14- Pension and other post-retirement benefit plans for additional details.

Washington Gas Light Company Changes in Accumulated Other Comprehensive Loss by Component
(In thousands)	Three Months Ended June 30,						Nine Months Ended June 30,
	2015			2014			2015			2014
Beginning Balance	$	(6,031	)	$	(10,969	)	$	(6,413	)	$	(11,048	)
Change in prior service cost (credit) (a)	(170		)	6,204			(511		)	6,135
Amortization of actuarial loss (a)	529			404			1,503			604
Current-period other comprehensive income	359			6,608			992			6,739
Income tax expense related to other comprehensive income	143			2,622			394			2,674
Ending Balance	$	(5,815	)	$	(6,983	)	$	(5,815	)	$	(6,983	)

^(a)  These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost. Refer to Note 14-Pension and other post-retirement benefit plans for additional details.

42

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

INTRODUCTION

This Management’sDiscussion and Analysis of Financial Condition and Results of Operations (Management’s Discussion) analyzes the financial condition, results of operations and cash flows of WGL and its subsidiaries. It also includes management’s analysis of past financial results and potential factors that may affect future results, potential future risks and approaches that may be used to manage them. Except where the content clearly indicates otherwise, “WGL,” “we,” “us” or “our” refers to the holding company or the consolidated entity of WGL Holdings, Inc. and all of its subsidiaries.

Management’s Discussion is divided into the following two major sections:

• WGL—This section describes the financial condition and results of operations of WGL Holdings, Inc. and its subsidiaries on a consolidated basis. It includes discussions of our regulated operations, including Washington Gas and Hampshire Gas Company (Hampshire), and our non-utility operations.

• Washington Gas—This section describes the financial condition and results of operations of Washington Gas, a subsidiary of WGL, which comprises the majority of the regulated utility segment.

Both sections of Management’s Discussion—WGL and Washington Gas—are designed to provide an understanding of our operations and financial performance and should be read in conjunction with the respective company’s financial statements and the combined Notes to Consolidated Financial Statements in this quarterly report as well as our combined Annual Report on Form 10-K for WGL and Washington Gas for the fiscal year ended September 30, 2014 (2014 Annual Report).

Unless otherwise noted, earnings per share amounts are presented on a diluted basis, and are based on weighted average common and common equivalent shares outstanding. Our operations are seasonal and, accordingly, our operating results for the interim periods presented are not indicative of the results to be expected for the full fiscal year.

EXECUTIVE OVERVIEW

Introduction

WGL, through its subsidiaries, sells and delivers natural gas and provides a variety of energy-related products and services to customers primarily in the District of Columbia and the surrounding metropolitan areas in Maryland and Virginia. In addition to our primary markets, WGL’s non-utility subsidiaries provide customized energy solutions across a much wider footprint, with business activities across the United States.

WGL has four operating segments:

• regulated utility;

• retail energy-marketing;

• commercial energy systems and

• midstream energy services.

Regulated Utility Operating Segment

The regulated utility operating segment is composed of our core subsidiary, Washington Gas. Washington Gas engages in the delivery and sale of natural gas that is regulated by regulatory commissions in the District of Columbia, Maryland and Virginia. During the third quarter, we saw positive earnings impacts in the segment from our asset optimization program, as well as from the accelerated pipe replacement plans that are in place in all three of our jurisdictions. Additionally, we saw a favorable effect of changes in natural gas consumption patterns in the District of Columbia. Partially offsetting these favorable effects were higher operating expenses driven primarily by higher labor, outside services and employee incentive costs.

43

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

Retail Energy-Marketing Operating Segment

We offer competitively priced natural gas, electricity and energy from renewable sources to customers through WGL Energy Services, our non-utility retail energy-marketing subsidiary.Our retail energy-marketing business performed well, with electric and natural gas margins higher than the third quarter of last year. Furthermore, our retail energy-marketing business has increased its focus on large commercial and government account relationships.

Commercial Energy Systems Operating Segment

Through WGL Energy Systems and WGSW we offer efficient and sustainable commercial energy solutions focused on owning and operating distributed generation assets such as Solar Photovoltaic (Solar PV) systems and upgrading energy related systems of large government and commercial facilities. During the third quarter, we saw positive earnings impacts in the segment from growth in distributed generation assets in service and higher income from state rebate programs for certain distributed generation projects. Offsetting these favorable effects were higher operating expenses. This segment continues to grow its distributed generation assets in service as well as its federal contracting and investment solar businesses.

Midstream Energy Services Operating Segment

WGL Midstream engages in acquiring and optimizing natural gas storage and transportation assets. During the third quarter, this segment experienced lower mark-to-market valuations compared to the same quarter of the prior fiscal year.

Other Activities

Transactions that are not significant enough on a stand-alone basis to warrant treatment as an operating segment, and that do not fit into one of our four operating segments, are aggregated as “Other Activities” and included as part of non-utility operations. Results for Other Activities for the nine months ended June 30, 2015 includes an impairment of ASDHI.

PRIMARY FACTORS AFFECTING WGL AND WASHINGTON GAS

The principal business, economic and other factors that affect our operations and/or financial performance include:

• weather conditions and weather patterns;

• regulatory environment, regulatory decisions and changes in legislation;

• availability of natural gas supply and pipeline transportation and storage capacity;

• diversity of natural gas supply;

• volatility of natural gas and electricity prices;

• non-weather related changes in natural gas consumption patterns;

• maintaining the safety and reliability of the natural gas distribution system;

• competitive environment;

• environmental matters;

• industry consolidation;

• economic conditions and interest rates;

• inflation;

• use of business process outsourcing; and

• labor contracts, including labor and benefit costs.

For further discussion of the factors listed above, refer to Management’s Discussion and Analysis of Financial Condition and Results of Operations in the 2014 Annual Report on Form 10-K which was filed with the Securities and Exchange Commission on November 21, 2014. Also, refer to the section entitled “Safe Harbor for Forward-Looking Statements” included in this quarterly report for a listing of forward-looking statements related to factors affecting WGL and Washington Gas.

44

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

CRITICAL ACCOUNTING POLICIES

Preparation of financial statements and related disclosures in compliance with Generally Accepted Accounting Principles in the United States of America requires the selection and the application of appropriate technical accounting guidance to the relevant facts and circumstances of our operations, as well as our use of estimates to compile the consolidated financial statements. The application of these accounting policies involves judgment regarding estimates and projected outcomes of future events, including the likelihood of success of particular regulatory initiatives, the likelihood of realizing estimates for legal and environmental contingencies, and the probability of recovering costs and investments in both the regulated utility and non-regulated business segments.

We have identified the following critical accounting policies that require our judgment and estimation, where the resulting estimates may have a material effect on the consolidated financial statements:

• accounting for unbilled revenue;

• accounting for regulatory operations — regulatory assets and liabilities;

• accounting for income taxes;

• accounting for contingencies;

• accounting for derivatives;

• accounting for fair value instruments; and

• accounting for pension and other post-retirement benefit plans.

For a description of these critical accounting policies, refer to Management’s Discussion within the 2014 Annual Report. There were no new critical accounting policies or changes to our critical accounting policies during the nine month period ended June 30, 2015.

45

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

WGL HOLDINGS, INC.

RESULTS OF OPERATIONS—Three Months Ended June 30, 2015 vs. June 30, 2014

Beginning in fiscal year 2015, our chief operating decision maker began utilizing earnings before interest and tax (“EBIT”) as the primary measure of profit and loss in assessing the results of each segment’s operations. EBIT includes operating income, other income (expense) and earnings from unconsolidated affiliates. We believe that EBIT enhances the ability to evaluate segment performance because it excludes interest and income tax expense, which are affected by corporate-wide strategies such as capital financing and tax sharing allocations.

EBIT should not be considered as an alternative to, or a more meaningful indicator of our operating performance than, net income. Refer to summary results below for a reconciliation of EBIT to income before income taxes.

Summary Results

For the three months ended June 30, 2015, WGL reported a net loss applicable to common stock of $(15.7) million, or $(0.32) per share, compared to a net loss of $(11.9) million, or ($0.23) per share, reported for the three months ended June 30, 2014. For the twelve month periods ended June 30, 2015 and 2014, we earned a return on average common equity of 13.1% and 1.2%, respectively.

The following table summarizes our EBIT by operating segment for the three months ended June 30, 2015 and 2014.

Analysis of Consolidated Results
	Three Months Ended June 30,						Increase/
(In millions)	2015			2014			(Decrease)
EBIT:
Regulated utility	$	(6.3	)	$	4.5		$	(10.8	)
Retail energy-marketing	16.7			1.3			15.4
Commercial energy systems	3.8			5.0			(1.2		)
Midstream energy services	(26.6		)	(16.8		)	(9.8		)
Other activities	(1.0		)	(2.5		)	1.5
Intersegment eliminations	(0.6		)	(0.5		)	(0.1		)
Total	$	(14.0	)	$	(9.0	)	$	(5.0	)
Interest expense	13.1			9.5			3.6
Loss before income taxes	$	(27.1	)	$	(18.5	)	$	(8.6	)
Income tax benefit	(11.7		)	(6.9		)	(4.8		)
Dividends on Washington Gas preferred stock	0.3			0.3			—
Net loss applicable to common stock	$	(15.7	)	$	(11.9	)	$	(3.8	)
LOSS PER AVERAGE COMMON SHARE
Basic	$	(0.32	)	$	(0.23	)	$	(0.09	)
Diluted	$	(0.32	)	$	(0.23	)	$	(0.09	)

46

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

Regulated Utility Operating Results

The following table summarizes the regulated utility segment’s financial data for the three months ended June 30, 2015 and 2014.

Regulated Utility Financial Data
	Three Months Ended June 30,					Increase/
(In millions)	2015			2014		(Decrease)
Utility net revenues(1):
Operating revenues	$	190.3		$	197.8	$	(7.5	)
Less: Cost of gas	64.5			67.3		(2.8		)
Revenue taxes	12.4			13.1		(0.7		)
Total utility net revenues	113.4			117.4		(4.0		)
Operation and maintenance	79.0			74.4		4.6
Depreciation and amortization	27.7			25.8		1.9
General taxes and other assessments	12.9			12.4		0.5
Other expenses—net	0.1			0.3		(0.2		)
EBIT	$	(6.3	)	$	4.5	$	(10.8	)

⁽¹⁾  We utilizeutility net revenues, calculated as revenues less the associated cost of energy and applicable revenue taxes,toassist in the analysis ofprofitabilityfor the regulated utility segment. The cost of the natural gas commodity and revenue taxes are generally included in the rates that Washington Gas charges to customers as reflected in operating revenues. Accordingly, changes in the cost of gas and revenue taxes associated with sales made to customers generally have no direct effect on utility net revenues, operating income or net income.Utility net revenues should not be considered an alternative, or a more meaningful indicator of our operating performance than operating income. Additionally, utility net revenues may not be comparable to similarly titled measures of other companies.

The decrease in EBIT primarily reflects the following:

• lower unrealized mark-to-market valuations associated with our asset optimization program;

• higher operation and maintenance expenses and

• higher depreciation due to the growth in our utility plant.

Partially offsetting these unfavorable variances were:

• higher realized margins associated with our asset optimization program and

• rate recovery related to the accelerated pipeline replacement programs.

Utility Net Revenues. The following table provides the key factors contributing to the changes in the utility net revenues of the regulated utility segment between the three months ended June 30, 2015 and 2014.

Composition of Changes in Utility Net Revenues
(In millions)	Increase/ (Decrease)
Customer growth	$	0.4
Estimated effects of weather and consumption patterns	0.8
Accelerated replacement programs	1.2
Asset optimization:
Realized margins	4.4
Unrealized mark-to-market valuations	(9.2		)
Other	(1.6		)
Total	$	(4.0	)

47

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

Customer growth — Average active customer meters increased by more than 12,900 for the three months ended June 30, 2015 compared to the same period of the prior fiscal year.

Estimated effects of weather and consumption patterns — Weather, when measured by HDDs, was 31.4% and 6.1% warmer than normal for the three months ended June 30, 2015 and 2014, respectively. In the District of Columbia, where Washington Gas does not have a billing mechanism or hedges to offset the effects of weather, the warmer weather in both periods resulted in a negative variance to net revenue (refer to the section entitled "Weather Risk" for further discussion of our weather protection strategy). The decrease to net revenue due to the warmer weather was more than offset by changes in natural gas consumption patterns in the District of Columbia primarily due to commercial customers converting from interruptible to firm service. These conversions resulted in additional net revenues of approximately $0.9 million. Additionally, natural gas consumption patterns may be affected by shifts in weather patterns in which customer heating usage may not correlate highly with average historical levels of usage per heating degree day that occurs. Natural gas consumption patterns may also be affected by non-weather related factors such as customer conservation.

Accelerated Replacement Programs — The positive effect on revenues is primarily due to the continued growth of our accelerated pipeline replacement programs in the District of Columbia, Maryland and Virginia (refer to "Rates and Regulatory Matters" for a further discussion of these programs).

Asset optimization — Realized margins for our asset optimization increased in the current period primarily due to favorable transportation spreads when compared to the prior period. We recorded unrealized losses associated with our energy-related derivatives of $10.4 million for the three months ended June 30, 2015, compared to unrealized losses of $1.2 million reported for the same period of the prior fiscal year. When these derivatives settle, any unrealized amounts will ultimately reverse and Washington Gas will realize margins in combination with related transactions that these derivatives economically hedge. Refer to the section entitled “Market Risk—Price Risk Related to the Regulated Utility Segment” for further discussion of our asset optimization program.

Operation and Maintenance Expenses. The following table provides the key factors contributing to the changes in operation and maintenance expenses of the regulated utility for the three months ended June 30, 2015 and 2014.

Composition of Changes in Operation and Maintenance Expenses
(In millions)	Increase/ (Decrease)
Employee incentives and direct labor costs	$	3.9
Employee benefits	(2.0		)
Business development	1.3
Support services	1.3
Impairments and related charges	(1.2		)
Other	1.3
Total	$	4.6

Employee incentives and direct labor costs — Washington Gas incurred increased employee incentives and labor costs for the three months ended June 30, 2015 over the same period of the previous fiscal year, as a result of an increase in employees, merit increases as well as an increase in the valuation of our share-based long-term incentive plan.

Employee benefits — The decrease primarily relates to an amendment to the post-retirement benefits plan in April 2014 that resulted in a re-measurement of the benefit obligation and a reduction in the net periodic expense for the quarter compared to the same period of the prior year.

Business development — The increase primarily relates to an increase in customer growth initiatives for Washington Gas.

Support services — Washington Gas incurred additional costs for the three months ended June 30, 2015 compared to the same period of the prior fiscal year due to increased project related costs including the implementation of a new customer information system as well as infrastructure support costs.

Impairments and related charges — The decrease for the three months ended June 30, 2015 over the same period of the prior fiscal year primarily reflects the impairment of a proposed Chillum liquefied natural gas facility during the prior

48

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

fiscal year period of $1.9 million. In fiscal year 2015, Washington Gas recorded selling costs of $0.5 million associated with reclassifying the Springfield Operations Center into held for sale on the balance sheet as well as other charges.

Depreciation and Amortization. The $1.9 million increase in depreciation and amortization reflects growth in our investment in utility plant, a portion of which is offset in revenue as a result of our accelerated pipeline replacement programs.

Retail Energy-Marketing

The following table depicts the retail energy-marketing segment’s financial data along with selected statistical data.

Retail Energy-Marketing Financial and Statistical Data
	Three Months Ended June 30,						Increase /
(In millions, other than statistics)	2015			2014			(Decrease)
Operating Results
Gross margins(1):
Operating revenues	$	268.3		$	275.3		$	(7.0	)
Less: Cost of energy	237.1			260.5			(23.4		)
Revenue taxes	2.3			1.9			0.4
Total gross margins	28.9			12.9			16.0
Operation expenses	10.8			10.4			0.4
Depreciation and amortization	0.2			0.2			—
General taxes and other assessments	1.3			1.1			0.2
Other income (expenses)—net	0.1			0.1			—
EBIT	16.7			1.3			15.4
Analysis of gross margins
Natural gas
Realized margins	$	17.9		$	13.5		$	4.4
Unrealized mark-to-market gains (losses)	0.3			(2.2		)	2.5
Total gross margins—natural gas	18.2			11.3			6.9
Electricity
Realized margins	13.0			3.1			9.9
Unrealized mark-to-market losses	(2.3		)	(1.5		)	(0.8		)
Total gross margins—electricity	10.7			1.6			9.1
Total gross margins	$	28.9		$	12.9		$	16.0
Other Retail Energy-Marketing Statistics
Natural gas
Therm sales (millions of therms)	112.4			116.2			(3.8		)
Number of customers (end of period)	147,100			161,300			(14,200		)
Electricity
Electricity sales (millions of kWhs)	2,893.1			2,790.3			102.8
Number of accounts (end of period)	141,200			169,600			(28,400		)

⁽¹⁾  We utilize gross margins to assist with the analysis of profitability for the retail energy-marketing segment. Gross margins are calculated as revenues less the associated cost of energy and applicable revenue taxes. We consider gross margins to be a better reflection of performance than gross revenues or gross energy costs for our retail energy-marketing segment because gross margins are a direct measure of the success of our core strategy for the sale of natural gas and electricity. Gross margins should not be considered an alternative, or a more meaningful indicator of our operating performance than operating income. Additionally, gross margins may not be comparable to similarly titled measures of other companies.

The increase in EBIT primarily reflects higher gross margins for gas and electricity sales in the current period. Period-to-period comparisons of quarterly gross margins for this segment can vary significantly and are not necessarily representative of expected annualized results.

49

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

The comparison of gross margins from natural gas sales between the three months ended June 30, 2015 and 2014 reflects higher unrealized mark-to-market valuations due to fluctuating market prices and an increase in realized natural gas margins due to lower natural gas purchase costs and favorable gas supply and pricing opportunities in the current period versus the same period of the prior year.

The increase in gross margins from electric sales between the three months ended June 30, 2015 and 2014 primarily reflects lower capacity charges from the regional power grid operator (PJM) associated with fixed price retail contracts. In addition, sales volumes were higher due to warmer weather and recent large commercial customer growth at lower unit margins. These positive benefits were slightly offset by increased PJM capacity costs implemented in June 2015, which impact the timing of margin recognition for fixed price retail contracts.

Commercial Energy Systems

The table below represents the financial results of the commercial energy systems segment for the three months ended June 30, 2015 and 2014.

Commercial Energy Systems Segment Financial Information
	Three Months Ended June 30,					Increase
(In millions)	2015			2014		(Decrease)
Operating revenues	$	14.7		$	14.3	$	0.4
Operating expenses:
Cost of sales	$	4.3		$	6.5	$	(2.2	)
Operations	6.6			2.3		4.3
Depreciation and amortization	2.8			1.6		1.2
General taxes and other assessments	0.1			0.1		—
Operating expenses	$	13.8		$	10.5	$	3.3
Equity earnings	0.5			0.7		(0.2		)
Other income	2.4			0.5		1.9
EBIT	$	3.8		$	5.0	$	(1.2	)
EBIT by division:
Energy-efficiency contracting	$	(2.2	)	$	0.5	$	(2.7	)
Commercial distributed generation	5.4			3.9		1.5
Investments in distributed generation	0.6			0.6		—
Total	$	3.8		$	5.0	$	(1.2	)

The decrease in EBIT reflects $3.0 million of unrecovered government contracting costs recorded in the current period related to contracting under the Small Business Administration's Business Development 8(a) Program. We do not anticipate any further unrecovered costs as the company exits its participation in this program. This was partially offset by additional distributed generation assets being placed in service in the current period versus the same period of the prior year, higher contract margins on new federal contracts and higher income from state rebate programs for certain distributed generation projects. Additionally, not reflected in EBIT are investment tax credits related to our distributed generation assets which were $1.1 million and $0.7 million for the three months ended June 30, 2015 and 2014, respectively.

50

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

Midstream Energy Services

The table below represents the financial results of the midstream energy services segment for the three months ended June 30, 2015 and 2014.

Midstream Energy Services Segment Financial Information
	Three Months Ended June 30,						Increase
(In millions)	2015			2014			(Decrease)
Operating revenues (a)	$	(25.8	)	$	(15.9	)	$	(9.9	)
Operating expenses:
Operations	$	1.2		$	0.9		$	0.3
General taxes and other assessments	0.3			0.1			0.2
Operating expenses	$	1.5		$	1.0		$	0.5
Equity earnings	0.7			0.1			0.6
EBIT	$	(26.6	)	$	(16.8	)	$	(9.8	)

^(a) The trading margins of Midstream Energy Services, including unrealized gains and losses on derivative instruments, are netted within operating revenues.

The decrease in EBIT primarily reflects lower mark-to-market valuations on our derivative instruments of $10.0 million. This unfavorable variance was partially offset by higher earnings on our equity investments.

Other Non-Utility Activities

Transactions that are not significant enough on a stand-alone basis to warrant treatment as an operating segment, and that do not fit into one of our four operating segments, are aggregated as “Other Activities” and included as part of non-utility operations. Our other non-utility activities reflect EBIT of $(1.0) million and $(2.5) million for the three months ended June 30, 2015 and 2014, respectively. The comparison reflects lower holding company branding initiative and business development costs in the current period.

Intersegment Eliminations

Intersegment eliminations include any mark-to-market valuations associated with trading activities between WGL Midstream and WGL Energy Services, intercompany loans and timing differences between Commercial Energy Systems’ recognition of revenue for the sale of REC's to Retail Energy-Marketing and Retail Energy-Marketing’s recognition of the associated expense.

Consolidated Interest Expense

The following table shows the components of WGL’s consolidated interest expense for the three months ended June 30, 2015 and 2014. The increase in interest on long-term debt primarily comprises unsecured MTNs and private placement notes issued by Washington Gas and senior notes issued by WGL.

Composition of Consolidated Interest Expense
	Three Months Ended June 30,				Increase/
(In millions)	2015		2014		(Decrease)
Interest on long-term debt	$	13.1	$	9.3	$	3.8
Allowance for funds used during construction and other- net	—		0.2		(0.2		)
Total	$	13.1	$	9.5	$	3.6

Consolidated Income Taxes

Please refer to the nine months ended June 30, 2015, for information about WGL’s income tax expense and effective income tax rate.

51

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

RESULTS OF OPERATIONS - Nine months endedJune 30, 2015 vs. June 30, 2014

Summary Results

WGL reported net income applicable to common stock of $129.7 million, or $2.59 per share, for the nine months ended June 30, 2015, an increase of $61.8 million over net income applicable to common stock of $67.9 million, or $1.31 per share, reported for the same period of the prior fiscal year.

The following table summarizes our EBIT by operating segment for the nine months ended June 30, 2015 and 2014.

Analysis of Consolidated Results
	Nine Months Ended June 30,						Increase/
(In millions)	2015			2014			(Decrease)
EBIT:
Regulated utility	$	238.6		$	158.4		$	80.2
Retail energy-marketing	39.2			5.2			34.0
Commercial energy systems	4.7			6.0			(1.3		)
Midstream energy services	(23.3		)	(29.4		)	6.1
Other activities	(8.9		)	(10.2		)	1.3
Intersegment eliminations	(0.5		)	0.1			(0.6		)
Total	$	249.8		$	130.1		$	119.7
Interest expense	38.7			28.0			10.7
Income before income taxes	$	211.1		$	102.1		$	109.0
Income tax expense	80.4			33.2			47.2
Dividends on Washington Gas preferred stock	1.0			1.0			—
Net income applicable to common stock	$	129.7		$	67.9		$	61.8
EARNINGS PER AVERAGE COMMON SHARE
Basic	$	2.60		$	1.31		$	1.29
Diluted	$	2.59		$	1.31		$	1.28

52

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

Regulated Utility Operating Results

The following table summarizes the regulated utility segment’s financial data for the nine months ended June 30, 2015 and 2014.

Regulated Utility Financial Data
	Nine Months Ended June 30,				Increase/
(In millions)	2015		2014		(Decrease)
Utility net revenues(1):
Operating revenues	$	1,193.2	$	1,305.0	$	(111.8	)
Less: Cost of gas	518.9		731.5		(212.6		)
Revenue taxes	73.3		74.1		(0.8		)
Total utility net revenues	601.0		499.4		101.6
Operation and maintenance	237.8		221.3		16.5
Depreciation and amortization	81.9		76.9		5.0
General taxes and other assessments	41.9		42.3		(0.4		)
Other expenses—net	0.8		0.5		0.3
EBIT	$	238.6	$	158.4	$	80.2

⁽¹⁾ We utilize utility net revenues, calculated as revenues less the associated cost of energy and applicable revenue taxes, to assist in the analysis of profitability for the regulated utility segment. The cost of the natural gas commodity and revenue taxes are generally included in the rates that Washington Gas charges to customers as reflected in operating revenues. Accordingly, changes in the cost of gas and revenue taxes associated with sales made to customers generally have no direct effect on utility net revenues, operating income or net income. Utility net revenues should not be considered an alternative, or a more meaningful indicator of our operating performance than operating income. Additionally, utility net revenues may not be comparable to similarly titled measures of other companies.

The increase in EBIT primarily reflects the following:

• higher utility net revenue related to the growth of more than 12,600 average active customer meters;

• favorable effects of changes in natural gas consumption patterns in the District of Columbia;

• higher realized margins associated with our asset optimization program;

• higher unrealized mark-to-market valuations associated with our asset optimization program;

• rate recovery related to the accelerated pipeline replacement programs and

• higher revenues due to new base rates in Maryland, effective for only a portion of fiscal year 2014.

Partially offsetting these favorable variances were:

• higher operation and maintenance expenses and

• higher depreciation due to the growth in our utility plant.

53

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

Utility Net Revenues. The following table provides the key factors contributing to the changes in the utility net revenues of the Regulated Utility segment between the nine months ended June 30, 2015 and 2014.

Composition of Changes in Utility Net Revenues
(In millions)	Increase/ (Decrease)
Customer growth	$	4.6
Estimated effects of weather and consumption patterns	2.4
Impact of rate cases	2.6
Accelerated replacement programs	6.3
Asset optimization:
Realized margins	1.2
Unrealized mark-to-market valuations	91.9
Lower-of-cost or market	(0.6		)
Late fees and other charges	(1.6		)
District of Columbia pension and OPEB tracker	(1.6		)
Other	(3.6		)
Total	$	101.6

Customer growth — Average active customer meters increased by more than 12,600 for the nine months ended June 30, 2015 compared to the same period of the prior fiscal year.

Estimated effects of weather and consumption patterns — Weather, when measured by HDDs, was 4.9% and 10.0% colder than normal for the nine months ended June 30, 2015 and 2014, respectively. This decrease in weather related effects was more than offset by changes in natural gas consumption patterns in the District of Columbia, partially due to commercial customers converting from interruptible to firm service. These conversions resulted in additional net revenues of approximately $1.8 million. Additionally, natural gas consumption patterns may be affected by shifts in weather patterns in which customer heating usage may not correlate highly with average historical levels of usage per heating degree days that occur. Natural gas consumption patterns may also be affected by non-weather related factors such as customer conservation.

Impact of rate cases — New base rates were approved in Maryland effective November 23, 2013. The new rates were in effect for a portion of the prior year versus the full fiscal year in the current period.

Accelerated replacement programs— The positive effect on revenues are the result of the continued growth of our accelerated pipeline replacement programs in the District of Columbia, Maryland and Virginia.

Asset optimization — We recorded unrealized losses associated with our energy-related derivatives of $13.3 million for the nine months ended June 30, 2015 compared to net unrealized losses of $105.2 million for the same period of the prior fiscal year. When these derivatives settle, any unrealized amounts will ultimately be reversed, and Washington Gas will realize margins in combination with the related transactions that these derivatives economically hedge. The large swings in the valuations are primarily due to movements in unobservable inputs used in the valuation of long-dated forward contracts. We believe that these values are not reflective of our ultimate cash flows as these purchases are utilized in the optimization of our long-term natural gas transportation and storage capacity resources, the value of which is not reflected at fair value. Unfavorably affecting asset optimization results were lower-of-cost or market adjustments related to storage gas inventory, which were $1.0 million and $0.4 million during the nine months ended June 30, 2015 and 2014, respectively. Refer to the section entitled “Market Risk-Price Risk Related to the Regulated Utility Segment” for a further discussion of our asset optimization program.

54

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

Operation and Maintenance Expenses. The following table provides the key factors contributing to the changes in operation and maintenance expenses of the Regulated Utility for the nine months ended June 30, 2015 and 2014.

Composition of Changes in Operation and Maintenance Expenses
(In millions)	Increase/ (Decrease)
Employee incentives and direct labor costs	$	13.3
Employee benefits	(9.7		)
Business development	3.8
System safety and integrity	1.6
Prior year insurance proceeds	1.3
Support services	4.2
Impairments and related charges	(1.6		)
Liability insurance	1.4
Other	2.2
Total	$	16.5

Employee incentives and direct labor costs — Washington Gas incurred increased incentives and labor costs for the nine months ended June 30, 2015 over the same period of the previous fiscal year, as a result of an increase in employees, merit increases as well as an increase in the valuation of our share-based long-term incentive plan.

Employee benefits — The decrease primarily relates to an amendment to the post-retirement benefits plan in April 2014 that resulted in a re-measurement of the benefit obligation and a reduction in the net periodic expense for the current period compared to the same period of the prior year.

Business development — The increase primarily relates to an increase in customer growth initiatives for Washington Gas.

System safety and integrity — Washington Gas incurred increased maintenance costs for the nine months ended June 30, 2015 compared to the same period of the previous fiscal year primarily due to weather-related safety and reliability activities.

Prior year insurance proceeds — The adverse effects on operations and maintenance expense during the nine month period ended June 30, 2015 over the same period of the prior fiscal year reflects the proceeds from Washington Gas' insurance policies for incurred legal costs and past and future environmental expenses, received in the same period of the prior fiscal year.

Support services — Washington Gas incurred additional costs for the nine months ended June 30, 2015 compared to the same period of the prior fiscal year due to increased project related costs including the implementation of a new customer information system as well as infrastructure support costs.

Impairments and related charges — The decrease in operations and maintenance expense for the nine months ended June 30, 2015 primarily reflects the impairment of a proposed Chillum liquefied natural gas facility during the prior fiscal year period of $1.9 million. In fiscal year 2015, Washington Gas recorded selling costs of $0.5 million associated with reclassifying the Springfield Operations Center into held for sale on the balance sheet as well as other charges.

Liability insurance — The increase in liability insurance is due to higher excess liability and cyber insurance in 2015.

Depreciation and Amortization.The $5.0 million increase in depreciation and amortization reflects growth in our investment in utility plant, a portion of which is offset in revenue as a result of our accelerated pipeline replacement programs.

55

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

Retail Energy-Marketing

The following table depicts the retail energy-marketing segment’s financial data along with selected statistical data.

Retail Energy-Marketing Financial and Statistical Data
	Nine Months Ended June 30,						Increase /
(In millions, other than statistics)	2015			2014			(Decrease)
Operating Results
Gross margins(1):
Operating revenues	$	1,003.3		$	1,035.7		$	(32.4	)
Less: Cost of energy	920.4			987.4			(67.0		)
Revenue taxes	6.7			6.2			0.5
Total gross margins	76.2			42.1			34.1
Operation expenses	33.0			33.3			(0.3		)
Depreciation and amortization	0.5			0.6			(0.1		)
General taxes and other assessments	3.6			3.2			0.4
Other income — net	0.1			0.2			(0.1		)
EBIT	39.2			5.2			34.0
Analysis of gross margins
Natural gas
Realized margins	$	50.3		$	50.4		$	(0.1	)
Unrealized mark-to-market gains (losses)	(10.6		)	6.4			(17.0		)
Total gross margins—natural gas	39.7			56.8			(17.1		)
Electricity
Realized margins	41.3			(14.9		)	56.2
Unrealized mark-to-market gains (losses)	(4.8		)	0.2			(5.0		)
Total gross margins—electricity	36.5			(14.7		)	51.2
Total gross margins	$	76.2		$	42.1		$	34.1
Other Retail Energy-Marketing Statistics
Natural gas
Therm sales (millions of therms)	628.0			635.8			(7.8		)
Number of customers (end of period)	147,100			161,300			(14,200		)
Electricity
Electricity sales (millions of kWhs)	8,549.9			8,670.9			(121.0		)
Number of accounts (end of period)	141,200			169,600			(28,400		)

⁽¹⁾ We utilize gross margins to assist with the analysis of profitability for the retail energy-marketing segment. Gross margins are calculated as revenues less the associated cost of energy and applicable revenue taxes. We consider gross margins to be a better reflection of performance than gross revenues or gross energy costs for our retail energy-marketing segment because gross margins are a direct measure of the success of our core strategy for the sale of natural gas and electricity. Gross margins should not be considered an alternative, or a more meaningful indicator of our operating performance than operating income. Additionally, gross margins may not be comparable to similarly titled measures of other companies.

The increase in EBIT primarily reflects improved realized margins for electricity in the current period, partially offset by lower mark-to-market valuations. Period-to-period comparisons of gross margins for this segment can vary significantly and are not necessarily representative of expected annualized results.

The comparison of gross margins from natural gas sales between the nine months ended June 30, 2015 and 2014 primarily reflects lower unrealized mark-to-market valuations due to fluctuating market prices.

The improvement in gross margins from electric sales reflects lower PJM capacity charges. Additionally, prior year electricity margins were much lower, reflecting extreme price movements during the colder than normal weather that occurred between January and March of 2014. These improved electricity margins were slightly offset by: (i) lower sales volumes due to lower customer counts; (ii) lower margins on certain large commercial sales due to competition and (iii) lower unrealized mark-to-market valuations due to fluctuating market prices.

56

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

Commercial Energy Systems

The table below represents the financial results of the commercial energy systems segment for the nine months ended June 30, 2015 and 2014.

Commercial Energy Systems Segment Financial Information
	Nine Months Ended June 30,						Increase
(In millions)	2015			2014			(Decrease)
Operating revenues	$	35.7		$	27.0		$	8.7
Operating expenses:
Cost of sales	15.5			13.6			1.9
Operations	12.6			5.4			7.2
Depreciation and amortization	7.7			4.2			3.5
General taxes and other assessments	0.3			0.2			0.1
Operating expenses	$	36.1		$	23.4		$	12.7
Equity earnings	1.6			1.5			0.1
Other income	3.5			0.9			2.6
EBIT	$	4.7		$	6.0		$	(1.3	)
EBIT by division:
Energy-efficiency contracting	$	(1.8	)	$	(0.1	)	$	(1.7	)
Commercial distributed generation	5.0			4.0			1.0
Investments in distributed generation	1.5			2.1			(0.6		)
Total	$	4.7		$	6.0		$	(1.3	)

The decrease in EBIT primarily reflects $3.0 million of unrecovered government contracting costs recorded in the current period related to contracting under the Small Business Administration's Business Development 8(a) Program. We do not anticipate any further unrecovered costs as the company exits its participation in this program. This was partially offset by additional distributed generation assets being placed in service in the current period versus the same period of the prior year, higher contract margins on new federal contracts and higher income from state rebate programs for certain distributed generation projects. Additionally, not reflected in EBIT are investment tax credits related to our distributed generation assets which were $3.0 million and $2.0 million for the nine months ended June 30, 2015 and 2014, respectively.

57

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

Midstream Energy Services

The table below represents the financial results of the midstream energy services segment for the nine months ended June 30, 2015 and 2014.

Midstream Energy Services Segment Financial Information
	Nine Months Ended June 30,						Increase
(In millions)	2015			2014			(Decrease)
Operating revenues (a)	$	(18.0	)	$	(21.9	)	$	3.9
Operating expenses:
Operations	6.5			7.5			(1.0		)
Depreciation and amortization	0.1			0.1			—
General taxes and other assessments	0.6			0.2			0.4
Operating expenses	$	7.2		$	7.8		$	(0.6	)
Equity earnings	1.9			0.3			1.6
EBIT	$	(23.3	)	$	(29.4	)	$	6.1

^(a) The trading margins of Midstream Energy Services, including unrealized gains and losses on derivative instruments, are netted within operating revenues.

The improvement to EBIT primarily reflects higher mark-to-market valuations on our derivative instruments of $26.1 million as well as lower investment development expenses and higher income related to our pipeline investments. These favorable variances were partially offset by a $18.8 million reduction to income due to a lower-of-cost or market adjustment on storage gas inventory compared to the prior year and unfavorable storage and transportation spreads which affected our realized margins.

Other Non-Utility Activities

Transactions that are not significant enough on a stand-alone basis to warrant treatment as an operating segment, and that do not fit into one of our four operating segments, are aggregated as “Other Activities” and included as part of non-utility operations. Our other non-utility activities reflect EBIT of $(8.9) million and $(10.2) million for the nine months ended June 30, 2015 and 2014, respectively. The comparison reflects a $5.6 million impairment related to ASDHI recorded in the current nine month period and lower holding company branding initiative and business development costs in the current period.

Intersegment Eliminations

Intersegment eliminations include any mark-to-market valuations associated with trading activities between WGL Midstream and WGL Energy Services, intercompany loans and timing differences between Commercial Energy Systems’ recognition of revenue for the sale of REC's to Retail Energy-Marketing and Retail Energy-Marketing’s recognition of the associated expense.

Consolidated Interest Expense

The following table shows the components of WGL’s consolidated interest expense for the nine months ended June 30, 2015 and 2014. The increase in interest on long-term debt primarily comprises unsecured MTNs and private placement notes issued by Washington Gas and senior notes issued by WGL.

Composition of Consolidated Interest Expense
	Nine Months Ended June 30,				Increase/
(In millions)	2015		2014		(Decrease)
Interest on long-term debt	$	38.3	$	27.4	$	10.9
Allowance for funds used during construction and other- net	0.4		0.6		(0.2		)
Total	$	38.7	$	28.0	$	10.7

58

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

Consolidated Income Taxes

The following table shows WGL’s consolidated income tax expense and effective income tax rate for the nine months ended June 30, 2015 and 2014.

Consolidated Income Taxes
	Nine Months Ended June 30,						Increase/
(In millions)	2015			2014			(Decrease)
Income before income taxes	$	211.0		$	102.0		$	109.0
Income tax expense	80.4			33.2			47.2
Effective income tax rate	38.1		%	32.5		%	5.6		%

The increase in the effective income tax rate, when comparing the nine months ended June 30, 2015 and 2014, is a result of the tax benefit recorded during the first quarter of fiscal year 2014 for the reinstatement of regulatory assets related to the tax effect of Med D, causing the rate to be lower during the prior year period. Refer to Note 9—Income Taxes of the Notes to the Consolidated Financial Statements of our combined Annual Report on Form 10-K for details.

LIQUIDITY AND CAPITAL RESOURCES

General Factors Affecting Liquidity

Access to short-term debt markets is necessary for funding our short-term liquidity requirements, the most significant of which include buying natural gas, electricity, and pipeline capacity, in addition to financing accounts receivable and storage gas inventory. Our need for access to long-term capital markets is driven primarily by capital expenditures, investment opportunities, maturities of long-term debt, and the availability of government funding through deferred taxes.

During the nine months ended June 30, 2015, both WGL and Washington Gas met their liquidity and capital needs through retained earnings, the issuance of commercial paper and long-term debt.

Our ability to access capital markets depends on our credit ratings, general market liquidity, and investor demand for our securities. Our credit ratings depend largely on the financial performance of our subsidiaries, and a ratings downgrade could both increase our borrowing costs and trigger the need for us to post additional collateral with our wholesale counterparties or other creditors. In support of our credit ratings, we have a goal to maintain our common equity ratio in the 50% range of total consolidated capital. As of June 30, 2015, total consolidated capitalization, including current maturities of long-term debt and excluding notes payable, comprised 55.3% common equity, 1.2% preferred stock and 43.5% long-term debt. The level of this ratio varies during the fiscal year due to the seasonal nature of our business. This seasonality also affects our short-term debt balances, which are typically higher in the fall and winter months and substantially lower in the spring when a significant portion of our current assets are converted into cash at the end of the heating season. Our cash flow requirements and our ability to provide satisfactory resources to meet those requirements are primarily influenced by the activities of all of WGL’s operating segments.

Our plans provide for sufficient liquidity to satisfy our financial obligations. At June 30, 2015, we had no restrictions on our cash balances or retained earnings that would affect the payment of common or preferred stock dividends by either WGL or Washington Gas.

Short-Term Cash Requirements and Related Financing

Washington Gas has seasonal short-term cash requirements to fund the purchase of storage gas inventory in advance of the winter heating season. At June 30, 2015 and September 30, 2014, Washington Gas had balances in gas storage of $60.3 million and $156.1 million, respectively. Washington Gas collects the cost of gas under cost recovery mechanisms approved by its regulators. Additionally, Washington Gas may be required to post cash collateral for certain purchases.

During the first six months of our fiscal year, Washington Gas’ large sales volumes cause its cash requirements to peak when combined storage inventory, accounts receivable and unbilled revenues are at their highest levels. During the last six months of our fiscal year, after the heating season, Washington Gas will typically experience a seasonal net loss due to reduced demand for natural gas. During this period, large amounts of Washington Gas’ current assets are converted to cash, which Washington Gas generally uses to reduce and usually eliminate short-term debt and acquire storage gas for the next heating season.

59

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

Variations in the timing of collections under Washington Gas’ gas cost recovery mechanisms can significantly affect its short-term cash requirements. At June 30, 2015 and September 30, 2014, Washington Gas had $1.9 million in net under-collections and $9.8 million in net over-collections, respectively, of gas costs reflected in current liabilities as gas costs due to customers. Amounts under-collected or over-collected that are generated during the current gas cost recovery cycle are deferred as a regulatory asset or liability on the balance sheet until September 1 of each year, at which time the accumulated amount is transferred to gas costs due from/to customers as appropriate. At June 30, 2015 and September 30, 2014, Washington Gas had a net regulatory liability of $27.3 million and a net regulatory asset of $0.9 million, respectively, related to the current gas recovery cycle.

WGL and Washington Gas use short-term debt in the form of commercial paper or unsecured short-term bank loans to fund seasonal cash requirements. Our policy is to maintain back-up bank credit facilities in an amount equal to or greater than our expected maximum commercial paper position. Bank credit balances available to WGL and Washington Gas, net of commercial paper balances, were $294.0 million and $350.0 million at June 30, 2015, and $85.5 million and $261.0 million at September 30, 2014, respectively.

On December 19, 2014, WGL and Washington Gas each entered into a first amendment to their respective credit agreements, each dated April 3, 2012. The amendments extend the maturity date of each credit facility until December 19, 2019, provided that the credit facilities will terminate on September 30, 2017, if Washington Gas does not obtain an extension of a regulatory approval authorizing the incurrence of short-term indebtedness. The credit facility for WGL permits it to borrow up to $450.0 million, and further permits, with the banks’ approval, additional borrowings of $100.0 million for a maximum potential total of $550.0 million. The credit facility for Washington Gas permits it to borrow up to $350.0 million, and further permits, with the banks’ approval, additional borrowings of $100.0 million for a maximum potential total of $450.0 million. The interest rate on loans made under each of the credit facilities will be a fluctuating rate per annum that will be set using certain parameters at the time each loan is made. WGL and Washington Gas incur credit facility fees, which in some cases are based on the long-term debt ratings of Washington Gas. In the event that the long-term debt of Washington Gas is downgraded below certain levels, WGL and Washington Gas would be required to pay higher fees. There are five different levels of fees. The credit facility for WGL defines its applicable fee level as one level below the level applicable to Washington Gas. Under the terms of the credit facilities, the lowest level facility fee is 0.06% and the highest is 0.175%. The credit agreements as amended each have the right to request two additional one-year extensions, with the banks’ approval.

A share repurchase program was approved by the Board of Directors and announced on August 7, 2014 to repurchase WGL’s common stock up to an amount of $150 million. The shares may be repurchased in the open market or in privately negotiated transactions. The repurchase program is authorized for a two year period. During the three months ended December 31, 2014, we repurchased 1.0 million shares of common stock for a cost of $41.5 million. Since the program’s inception, we have repurchased 2.3 million shares of common stock for a total cost of $97.6 million.

To manage credit risk, Washington Gas may require certain customers and suppliers to provide deposits, which may include collateral from wholesale counterparties, which are reported as current liabilities in “Customer deposits and advance payments,” in the accompanying balance sheets. At June 30, 2015 and September 30, 2014, “Customer deposits and advance payments” totaled $73.1 million and $68.3 million, respectively. For Washington Gas, deposits from customers may be refunded at various times throughout the year based on the customer’s payment habits. At the same time, other customers make new deposits that cause the balance of customer deposits to remain relatively steady. There are no restrictions on Washington Gas’ use of these customer deposits. Washington Gas pays interest to its customers on these deposits in accordance with the requirements of its regulatory commissions.

For WGL Energy Services and WGL Midstream, deposits would typically represent collateral for transactions with wholesale counterparties. These deposits may be reduced, repaid or increased at any time based on the current value of WGL Energy Services’ or WGL Midstream’s net position with the counterparty. Currently, there are no restrictions on the use of deposited funds and interest is paid to the counterparty on these deposits in accordance with its contractual obligations. Refer to the section entitled "Credit Risk" for further discussion of our management of credit risk.

WGL Energy Services and WGL Midstream have seasonal short-term cash requirements to fund the purchase of storage gas inventory in advance of the winter heating season. At June 30, 2015 and September 30, 2014, WGL Energy Services had balances in gas storage of $22.2 million and $50.5 million, respectively. WGL Energy Services collects revenues that are designed to reimburse commodity costs used to supply their retail customer and wholesale counterparty contracts. At June 30, 2015 and September 30, 2014, WGL Midstream had balances in gas storage of $65.0 million and $127.0 million, respectively. As market opportunities arise, WGL Midstream collects revenues in excess of its commodity costs through its wholesale counterparty contracts. WGL Energy Services and WGL Midstream derive funding to finance these activities from short-term

60

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

debt issued by WGL. Additionally, WGL Energy Services and WGL Midstream may be required to post cash collateral for certain purchases. WGL Energy Services and WGL Midstream may be required to provide parent guarantees from WGL for certain transactions.

In addition to storage gas, WGL Midstream also has cash requirements to fund the capital requirements of its various pipeline investments. At June 30, 2015, WGL Midstream had a $57.0 million investment related to these pipelines. WGL Midstream derives funding to finance capital calls related to these investments from short-term debt issued by WGL.

WGL Energy Systems has cash requirements to fund the construction and purchase of residential and commercial distributed generating systems. WGL Energy Systems derives funding to finance these activities from short-term and long-term debt issued by WGL but may also utilize long-term debt issued by WGL.

Long-Term Cash Requirements and Related Financing

The primary drivers of our long-term cash requirements include capital expenditures, non-utility investments, long-term debt maturities, and our share repurchase program. For the regulated utility segment, our capital expenditures primarily relate to adding new utility customers and system supply as well as maintaining the safety and reliability of Washington Gas’ distribution system. Refer to the section entitled “Capital Investments” for discussion of our capital expenditures forecast and our 2014 Annual Report for a discussion of our long-term debt maturities.

For our non-utility segments, our long-term cash requirements primarily depend upon the level of investments and capital expenditures. For WGL Midstream, our investments primarily relate to providing capital for construction of the pipeline investments. For WGL Energy Systems, our investments primarily relate to providing capital for construction of new residential and commercial solar projects.

WGL Debt Issuances. On October 24, 2014, WGL issued $100.0 million of 2.25% notes due November 1, 2019 (“2019 Notes”) and $125.0 million of 4.60% notes due November 1, 2044 (“2044 Notes”). The notes were priced at 99.79% and 99.23% of par, respectively. WGL may redeem the 2019 Notes at any time prior to October 1, 2019 subject to a make whole premium plus accrued and unpaid interest. At any time on or after October 1, 2019, WGL may redeem the 2019 Notes at 100% of the principal of such notes, plus accrued and unpaid interest. WGL may redeem the 2044 Notes at any time prior to May 1, 2044 subject to a make whole premium, plus accrued and unpaid interest. WGL may redeem the 2044 Notes at any time on or after May 1, 2044 at 100% of the principal of such notes, plus accrued and unpaid interest.

On December 16, 2014, WGL re-opened the 2044 Notes offering and sold an additional $25.0 million of 4.60% notes due November 1, 2044. These additional notes were priced at 97.61% of par. In order to match interest payments with the earlier issuance, WGL received $0.2 million of accrued interest at the settlement date. These notes have the same terms and provisions as the earlier issuance.

In March 2015, WGL entered into intercompany agreements with three of its affiliates, WGL Energy Systems, WGSW and WGL Midstream.  These agreements have terms consistent with WGL’s 2019 and 2044 notes issued in October and December 2014.  The intercompany loans are eliminated in consolidation.

The net proceeds from the sale of these notes have been used by WGL primarily to fund the repurchase of outstanding securities of WGL and capital investments of its non-utility subsidiaries.

Washington Gas Debt Issuances. On December 15, 2014, Washington Gas issued $50.0 million of 4.24% notes due December 15, 2044 in a private placement exempt from the registration requirements of the Securities Act of 1933 in reliance on Section 4(a)(2) of the Securities Act. Proceeds from these notes, after the payment of placement fees in connection with the transaction, have been used for general corporate purposes. Washington Gas plans to file a shelf registration to issue additional MTNs during the quarter ended September 30, 2015.

61

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

Security Ratings

The table below reflects the current credit ratings for the outstanding debt instruments of WGL and Washington Gas. Changes in credit ratings may affect WGL’s and Washington Gas’ cost of short-term and long-term debt and our access to the capital markets. A security rating is not a recommendation to buy, sell or hold securities. The rating may be subject to revision or withdrawal at any time by the assigning rating organization and each rating should be evaluated independently of any other rating.

Credit Ratings for Outstanding Debt Instruments
	WGL		Washington Gas
Rating Service	Senior Unsecured	Commercial Paper	Senior Unsecured	Commercial Paper
Fitch Ratings(a)	A	F1	AA-	F1
Moody’s Investors Service(b)	A3	P-2	A1	P-1
Standard & Poor’s Ratings Services(c)	A	A-1	A+	A-1

(a) The long-term debt ratings outlook issued by Fitch Ratings for WGL and Washington Gas is stable.

(b) The long-term debt ratings outlook issued by Moody’s Investors Service for WGL and Washington Gas is stable.

(c) The long-term debt ratings outlook issued by Standard & Poor’s Rating Services for WGL and Washington Gas is stable.

Ratings Triggers and Certain Debt Covenants

WGL and Washington Gas pay credit facility fees, which in some cases are based on the long-term debt ratings of Washington Gas. Under the terms of WGL’s and Washington Gas' credit agreements and private placement notes, the ratio of consolidated financial indebtedness to consolidated total capitalization cannot exceed 0.65 to 1.0 (65.0%). In addition, WGL and Washington Gas are required to inform lenders of changes in corporate existence, financial conditions, litigation and environmental warranties that might have a material effect on debt ratings. The failure to inform the lenders’ agent of material changes in these areas might constitute default under the agreements. Additionally, failure to pay principal or interest on any other indebtedness may be deemed a default under our credit agreements. A default, if not remedied, may lead to a suspension of further loans and/or acceleration in which obligations become immediately due and payable. At June 30, 2015, we were in compliance with all of the covenants under our revolving credit facilities.

For certain of Washington Gas’ natural gas purchase and pipeline capacity agreements, if the long-term debt of Washington Gas is downgraded to or below the lower of a BBB- rating by Standard & Poor’s or a Baa3 rating by Moody’s Investors Service, or if Washington Gas is deemed by a counterparty not to be creditworthy, then the counterparty may withhold service or deliveries, or may require additional credit support. For certain other agreements, if the counterparty’s credit exposure to Washington Gas exceeds a contractually defined threshold amount, or if Washington Gas’ credit rating declines by a certain rating level, then the counterparty may require additional credit support. At June 30, 2015, Washington Gas would be required to provide additional credit support of $2.4 million for these arrangements if its long-term credit rating was to be downgraded by one rating level.

WGL guarantees payments for certain purchases of natural gas and electricity on behalf of WGL Energy Services and WGL Midstream (refer to “Contractual Obligations, Off-Balance Sheet Arrangements and Other Commercial Commitments” for further discussion of these guarantees). If the credit rating of WGL declines, WGL Energy Services and WGL Midstream may be required to provide additional credit support for these purchase contracts. At June 30, 2015, neither WGL Energy Services nor WGL Midstream would be required to provide additional credit support for these arrangements if the long-term credit rating of WGL was to be downgraded by one rating level.

62

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

Historical Cash Flows

The following table summarizes WGL’s net cash provided by (used in) operating, investing and financing activities for the nine months ended June 30, 2015 and 2014:

	Nine Months Ended June 30,
(In millions)	2015			2014			Increase/ (Decrease)
Cash provided by (used in):
Operating activities	$	513.0		$	443.0		$	70.0
Investing activities	$	(342.5	)	$	(268.8	)	$	(73.7	)
Financing activities	$	(113.2	)	$	(164.7	)	$	51.5

Cash Flows Provided by Operating Activities

The regulated utility’s cash flows from operating activities principally reflect gas sales and deliveries and the cost of operations. The volume of gas sales and deliveries is dependent primarily on factors external to the utility, such as growth of customer demand, weather, market prices for energy, economic conditions and measures that promote energy efficiency. Under revenue and weather normalization, ratemaking adjustments and decoupling mechanisms in place, changes in delivery volumes from levels assumed when rates were approved may affect the timing of cash flows but not net income. The price at which the utility provides energy to customers is determined in accordance with regulatory approved tariffs. In general, changes in the utility’s cost of gas may affect the timing of cash flows but not net income because the costs are recovered in accordance with rate agreements. In addition, the regulated utility’s cash flow is impacted by the timing of derivative settlements.

The non-utility cash flows from operating activities primarily reflect: i) the timing of receipts related to distributed generation and federal projects at commercial energy systems; ii) the timing of receipts related to electric and gas bills for WGL Energy Services and iii) the timing of gas purchases and sales resulting from asset optimization arrangements at WGL Midstream. Both WGL Energy Services' and WGL Midstream's cash flows are impacted by the timing of derivative settlements.

Net income is the result of cash and non-cash (or accrual) transactions. Only cash transactions affect WGL’s cash flows from operating activities. Principal non-cash charges include depreciation, accrued or deferred pension and other post-retirement benefit costs and deferred income tax expense. Non-cash charges or credits may also be accrued under the revenue decoupling and cost reconciliation mechanisms in the utility’s rate plans.

Net cash flows provided by operating activities for the nine months ended June 30, 2015 was $513.0 million compared to $443.0 million for the nine months ended June 30, 2014. The increase in net cash flows primarily reflects timing differences with respect to cash flows for energy related payments and receipts as well as the timing of income tax payments.

Cash Flows Used in Investing Activities

During the nine months ended June 30, 2015, cash flows used in investing activities totaled $342.5 million compared to $268.8 million for the nine months ended June 30, 2014. This increase is primarily due to an increase in cash used for capital expenditures of $75.6 million due to additional funding for Washington Gas' accelerated pipeline replacement programs, as well as investments in non-utility commercial distributed generation projects.

Cash Flows Used in Financing Activities

Cash flows used in financing activities totaled $113.2 million for the nine months ended June 30, 2015, a $51.5 million decrease over the same period of the prior year. This use of cash reflects the $258.2 million increase in the net issuance of long-term debt, partially offset by the $41.5 million in common stock repurchased during the first quarter of fiscal year 2015 and a $161.9 million net change in notes payable issued (retired).

63

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

Capital Investments

The following table depicts our projected capital investments for the fiscal years 2015 through 2019. In addition to expenditures to extend service to new areas, to ensure safe, reliable and improved service for our utility and to grow our non-utility investments, our capital investments include an investment in a new pipeline construction project entered into during the nine months ended June 30, 2015. Refer to Note 11 - Other Investments in the notes to the consolidated financial statements for further discussion about this project.

Capital Investments
(In millions)	2015(a)		2016		2017		2018		2019		Total
New business(b)	$	85.7	$	137.5	$	142.4	$	162.6	$	171.4	$	699.6
Replacements:
Regulatory plans	93.1		94.7		95.7		96.3		96.6		476.4
Other	48.1		54.0		48.3		46.2		45.7		242.3
Customer information system	24.6		35.4		17.5		—		—		77.5
Other utility	48.7		50.0		62.0		55.8		47.6		264.1
Total utility(c)	300.2		371.6		365.9		360.9		361.3		1,759.9
Pipeline investments	55.6		133.1		358.3		128.7		37.1		712.8
Distributed generation	123.1		100.1		100.1		100.1		100.1		523.5
Investment solar	27.0		—		—		—		—		27.0
Other non-utility	0.7		2.3		0.5		0.6		0.5		4.6
Total investments	$	506.6	$	607.1	$	824.8	$	590.3	$	499.0	$	3,027.8

^{(a)  Includes full year of projected activity.} 

^{(b)  Includes certain projects that support the existing distribution system.} 

^{(c)  Excludes Allowance for Funds Used During Construction and cost of removal. Includes capital expenditures accrued and capital expenditure adjustments recorded in the fiscal year.} 

CONTRACTUAL OBLIGATIONS, OFF-BALANCE SHEET ARRANGEMENTS, AND OTHER COMMERCIAL COMMITMENTS

Contractual Obligations

On November 30, 2014, WGL through its subsidiary, WGL Midstream, entered into a gas sale and purchase, and capacity agreement with GAIL Global (USA) LNG LLC, a subsidiary of GAIL (India) Limited, under which WGL Midstream has agreed to sell and deliver a minimum of 340,000 dekatherms per day and up to 430,000 dekatherms per day of natural gas, for a term of 20 years from the in-service date of the export facility. The contract price is based on index pricing, but certain gas sales will occur at a market price per dekatherm of gas based on the estimate of prices prevailing at designated delivery points. WGL Midstream will make deliveries using transportation capacity released by GAIL through an asset management arrangement. On March 10, 2015, WGL Midstream entered into gas purchase commitments to buy 500,000 dekatherms of natural gas per day at index based prices for a 20-year term. We will also be a shipper on the Mountain Valley Pipeline. These commitments were executed in conjunction with the investment in Mountain Valley.

64

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

As a result of these agreements, additional purchase commitments for WGL Midstream are reflected in the table below. The estimated obligations as of June 30, 2015 for future fiscal years are as follows.

Estimated Contractual Obligations and Commercial Commitments
(In millions)	Remainder 2015		2016		2017		2018		2019		Thereafter		Total
Pipeline and storage contracts(a)	$	62.8	$	241.3	$	230.7	$	228.2	$	264.2	$	2,267.4	$	3,294.6
Long-term debt(b)	20.0		25.0		—		—		50.0		896.0		991.0
Interest expense(c)	12.5		48.4		48.1		48.1		45.0		666.8		868.9
Gas purchase commitments(d)
—Washington Gas	42.4		359.6		465.4		460.9		453.2		5,577.2		7,358.7
—WGL Energy Services	37.1		146.3		57.3		6.7		—		—		247.4
—WGL Midstream	20.9		258.9		389.5		1,217.4		1,747.8		35,647.5		39,282.0
Electric purchase commitments(e)	153.3		418.1		171.3		36.5		2.0		0.5		781.7
Operating leases	1.9		5.5		4.8		4.3		1.0		9.3		26.8
Business process outsourcing(f)	8.3		32.8		23.9		—		—		—		65.0
Other long-term commitments(g)	5.1		7.8		5.7		2.2		—		0.4		21.2
Total	$	364.3	$	1,543.7	$	1,396.7	$	2,004.3	$	2,563.2	$	45,065.1	$	52,937.3

^(a)  Represents minimum payments for natural gas transportation, storage and peaking contracts for Washington Gas, WGL Energy Services and WGL Midstream.

^(b)  Represents scheduled repayment of principal. Excludes $6.3 million in debt that is anticipated to be a non-cash extinguishment of project debt financing.

^(c)  Represents the scheduled interest payments associated with long-term debt for WGL and Washington Gas.

^(d)  Includes known and reasonably likely commitments to purchase fixed volumes of natural gas. Cost estimates are based on forward market prices as of June 30, 2015.

^(e)  Represents electric purchase commitments that are based on existing fixed price and fixed volume contracts. Includes $18.2 million related to renewable energy credits.

^(f)  Represents fixed costs to the service provider related to the 10-year contract for business process outsourcing entered into in 2007. These payments do not reflect potential inflationary adjustments included in the contract. Including these inflationary adjustments, required payments to the service provider could total $78.2 million over the remaining contract term.

^(g)  Includes secured supply agreements’ minimum program fees, certain information technology service contracts and committed payments related to certain environmental response costs and excludes uncertain tax positions.

Off-Balance Sheet Arrangements

WGL has provided contributions and guarantees to Meade on behalf of WGL Midstream. As of June 30, 2015, our maximum exposure to loss was $59.4 million. WGL has provided guarantees to Mountain Valley on behalf of WGL Midstream and another partner in the venture. WGL's maximum exposure to loss due to the provided guarantees was $20.0 million at June 30, 2015. Refer to Note 11 - Other Investments of the Notes to Consolidated Financial Statements for a further discussion of our Meade and Mountain Valley investments.

Financial Guarantees

WGL has guaranteed payments primarily for certain purchases of natural gas and electricity on behalf of WGL Energy Services and for certain purchase commitments on behalf of WGL Midstream. At June 30, 2015, these guarantees totaled $224.8 million and $311.8 million for WGL Energy Services and WGL Midstream, respectively. At June 30, 2015, WGL also had guarantees on behalf of other subsidiaries totaling $9.1 million. The amount of such guarantees is periodically adjusted to reflect changes in the level of financial exposure related to these commitments. For all of our financial guarantees, WGL may cancel any or all future obligations upon written notice to the counterparty, but WGL would continue to be responsible for the obligations created under the guarantees prior to the effective date of the cancellation. WGL has also guaranteed payments for certain of our external partners. At June 30, 2015, these guarantees totaled $8.1 million.

65

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

Constitution Pipeline

In May 2013, WGL Midstream entered into an equity investment in Constitution Pipeline Company, LLC. The pipeline project is designed to transport at least 650,000 dekatherms of natural gas per day from the Marcellus region in northern Pennsylvania to major northeastern markets. Fully contracted with long-term commitments from established natural gas producers currently operating in Pennsylvania, the pipeline will originate from the Marcellus production areas in Susquehanna County, PA, and interconnect with the Iroquois Gas Transmission and Tennessee Gas Pipeline systems in Schoharie County, N.Y.

Constitution Pipeline LLC has adjusted the pipeline’s targeted in-service date to the second half of 2016 as a result of a longer than expected regulatory and permitting process. An affiliate of Williams Partners will construct, operate and maintain the new 30-inch, 126-mile long transmission pipeline.

WGL Midstream will invest an estimated $79.0 million in the project for a 10% share in the pipeline venture. WGL Midstream's project partners are Williams Partners L.P. (41% share), Cabot Oil and Gas Corporation (25% share) and Piedmont Natural Gas (24% share). In June 2013, Constitution Pipeline filed a formal certificate application with the FERC. On December 2, 2014, the FERC issued an order granting a certificate of public convenience and necessity.

Central Penn Line Pipeline

In February 2014, WGL Midstream entered into a limited liability company agreement and formed Meade, with COG Holdings LLC, Vega Midstream MPC LLC, and River Road Interests LLC.

Meade was formed to jointly develop and own, together with Transcontinental Gas Pipe Line Company, LLC (Transco), an approximately 177-mile pipeline originating in Susquehanna County, Pennsylvania and extending to Lancaster County, Pennsylvania (Central Penn) that will have the capacity to transport and deliver up to approximately 1.7 million dekatherms per day of natural gas. This pipeline will be an integral part of Transco’s “Atlantic Sunrise” project.

Central Penn, as part of Atlantic Sunrise, is a natural gas pipeline designed to provide new firm transportation capacity from various supply points in northeast Pennsylvania to a delivery point into Transco’s mainline in southeast Pennsylvania. Central Penn currently has a projected in-service date in the second half of 2017. WGL Midstream will invest an estimated $412.0 million for a 55% interest in Meade, and Meade will invest an estimated $746 million in Central Penn for an approximate 39% interest in Central Penn. Transco will have the remaining ownership interests.

Additionally, in February 2014, WGL Midstream entered into an agreement with Cabot Oil & Gas Corporation (Cabot) whereby WGL Midstream will purchase 500,000 dekatherms per day of natural gas from Cabot over a 15 year term. As part of this agreement, Cabot will acquire 500,000 dekatherms per day of firm gas transportation capacity on Transco’s Atlantic Sunrise project of which Central Penn is a part. This capacity will be released to WGL Midstream.

Mountain Valley Pipeline

In March 2015, WGL Midstream acquired a 7% equity interest in Mountain Valley.

The proposed pipeline to be developed, constructed, owned and operated by Mountain Valley will transport approximately 2.0 million dekatherms of natural gas per day from a new interconnect with EQT Corporation's Equitrans system, near the MarkWest Mobley plant in Smithfield, West Virginia to Transco's Station 165 in Pittsylvania County, Virginia. The pipeline is scheduled to be in service by December 2018.

The total project investment is anticipated to be between $3.0-$3.5 billion. WGL Midstream will invest, in scheduled capital contributions through the in-service date of the pipeline, its pro rata share (based on its 7% equity interest) of project costs, for an estimated aggregate amount of approximately $230 to $245 million. In addition, WGL Midstream entered into a gas purchase commitment to buy 500,000 dekatherms of natural gas per day, at index-based prices, for a 20 year term and we will also be a shipper on the proposed pipeline.

CREDIT RISK

Wholesale Credit Risk

Certain wholesale suppliers that sell natural gas to any or all of Washington Gas, WGL Energy Services, and WGL Midstream may have relatively low credit ratings or may not be rated by major credit rating agencies.

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WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

Washington Gas enters into transactions with wholesale counterparties for the purpose of meeting firm ratepayer commitments, to optimize the value of its long-term capacity assets, and for hedging natural gas costs. In the event of a counterparty’s failure to deliver contracted volumes of gas or fulfill its payment obligations, Washington Gas may incur losses that would typically be passed through to its sales customers under the purchased gas cost adjustment mechanisms. Washington Gas may be at risk for financial loss to the extent these losses are not passed through to its customers.

For WGL Energy Services, any failure of wholesale counterparties to deliver natural gas or electricity under existing contracts could cause financial exposure for the difference between the price at which WGL Energy Services has contracted to buy these commodities and their replacement cost from another supplier. To the extent that WGL Energy Services sells natural gas to these wholesale counterparties, WGL Energy Services may be exposed to payment risk if WGL Energy Services is in a net receivable position. Additionally, WGL Energy Services enters into contracts with counterparties to hedge the costs of natural gas and electricity. Depending on the ability of the counterparties to fulfill their commitments, WGL Energy Services could be at risk for financial loss.

WGL Midstream enters into transactions with wholesale counterparties to hedge and optimize its portfolio of owned and managed natural gas assets. Any failure of wholesale counterparties to deliver natural gas under existing contracts could cause financial exposure for the difference between the price at which WGL Midstream has contracted to buy these commodities and their replacement cost. To the extent that WGL Midstream sells natural gas to these wholesale counterparties, WGL Midstream may be exposed to payment risk if it is in a net receivable position. In addition, WGL Midstream enters into contracts with counterparties to hedge the costs of natural gas. Depending on the ability of the counterparties to fulfill their commitments, WGL Midstream could be at risk for financial loss.

Washington Gas, WGL Energy Services, and WGL Midstream operate under an existing wholesale counterparty credit policy that is designed to mitigate credit risks through requirements for credit enhancements including, but not limited to, letters of credit, parent guarantees and cash collateral when deemed necessary. In accordance with this policy, Washington Gas, WGL Energy Services, and WGL Midstream have each obtained credit enhancements from certain of their counterparties. If certain counterparties or their guarantors meet the policy’s creditworthiness criteria, Washington Gas, WGL Energy Services, and WGL Midstream may grant unsecured credit to those counterparties or their guarantors. The creditworthiness of all counterparties is continuously monitored.

Washington Gas, WGL Energy Services and WGL Midstream are also subject to the collateral requirements of their counterparties. At June 30, 2015, Washington Gas, WGL Energy Services and WGL Midstream provided $7.9 million, $14.6 million and $13.4 million in cash collateral to counterparties, respectively.

67

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

The following table provides information on our credit exposure, net of collateral, to wholesale counterparties as of June 30, 2015 for Washington Gas, WGL Energy Services and WGL Midstream, separately.

Credit Exposure to Wholesale Counterparties(In millions)
Rating(a)	Exposure Before Credit Collateral(b)		Offsetting Credit Collateral Held(c)		Net Exposure		Number of Counterparties Greater Than 10%(d)	Net Exposure of Counterparties Greater Than 10%
Washington Gas
Investment Grade	$	34.4	$	—	$	34.4	2	$	23.4
Non-Investment Grade	—		—		—		—	—
No External Ratings	3.5		—		3.5		—	—
WGL Energy Services
Investment Grade	$	0.1	$	—	$	0.1	1	$	0.1
Non-Investment Grade	—		—		—		—	—
No External Ratings	0.1		—		0.1		1	0.1
WGL Midstream
Investment Grade	$	19.9	$	—	$	19.9	2	$	15.0
Non-Investment Grade	—		—		—		—	—
No External Ratings	2.3		—		2.3		—	—

^(a)  Investment Grade is primarily determined using publicly available credit ratings of the counter-party. If the counter party has provided a guarantee by a higher-rated entity (e.g., its parent), it is determined based upon the rating of it guarantor. Included in “Investment Grade” are counterparties with a minimum Standard & Poor’s or Moody’s Investor Service rating of BBB- or Baa3, respectively.

^(b)  Includes the net of all open positions on energy-related derivatives subject to mark-to-market accounting requirements and the net receivable/payable for the realized transactions. Amounts due from counterparties are offset by liabilities payable to those counterparties to the extent that contractual netting arrangements are in place.

^(c)  Represents cash deposits and letters of credit received from counterparties, not adjusted for probability of default.

^(d)  Using a percentage of the net exposure.

Retail Credit Risk

Washington Gas is exposed to the risk of non-payment of utility bills by certain of its customers. To manage this customer credit risk, Washington Gas may require cash deposits from its high risk customers to cover payment of their bills until the requirements for the deposit refunds are met. In addition, Washington Gas implemented a POR program as approved by the PSC of MD, whereby it purchases receivables from participating energy marketers at approved discount rates. Under the program, Washington Gas is exposed to the risk of non-payment by the retail customers for these receivables. This risk is factored into the approved discount rate at which Washington Gas purchases the receivables.

WGL Energy Services is also exposed to the risk of non-payment by its retail customers. WGL Energy Services manages this risk by evaluating the credit quality of certain new customers as well as by monitoring collections from existing customers. To the extent necessary, WGL Energy Services can obtain collateral from, or terminate service to, its existing customers based on credit quality criteria. In addition, WGL Energy Services participates in POR programs with certain Maryland, District of Columbia and Pennsylvania utilities, whereby it sells its receivables to various utilities at approved discount rates. Under the POR programs, WGL Energy Services is exposed to the risk of non-payment by its retail customers for delivered commodities that have not yet been billed. Once the invoices are billed, however, the associated credit risk is assumed by the purchasing utilities that sponsor POR programs. While participation in POR programs reduce the risk of collection and fixes a discount rate on the receivables, there is a risk that the discount rate paid to participate in the POR program will exceed the actual bad debt expense and billing fees associated with these receivables.

WGL Energy Systems is subject to retail credit risk associated with customers who purchase electricity under long term agreements from distributed generation assets owned by the company. The customers undergo credit evaluation prior to contract execution and are monitored periodically during the contract term for payment performance and credit quality. These steps mitigate credit risk associated with the distributed generation asset customers.

WGSW is indirectly subject to retail credit risk associated with non-payment by customers who lease distributed energy equipment or maintain energy service agreements through ASD Solar LP, Nextility and SunEdison. This credit risk is mitigated with minimum credit quality criteria established in each of WGSW’s agreements. These criteria must be satisfied for WGSW to participate in the project financing arrangement or partnership interest.

68

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

WGL Midstream is not subject to retail credit risk.

MARKET RISK

We are exposed to various forms of market risk including commodity price risk, weather risk and interest-rate risk. The following discussion describes these risks and our management of them.

Price Risk Related to the Regulated Utility Segment

Washington Gas faces price risk associated with the purchase and sale of natural gas. Washington Gas generally recovers the cost of the natural gas to serve customers through gas cost recovery mechanisms as approved in jurisdictional tariffs; therefore, a change in the price of natural gas generally has no direct effect on Washington Gas’ net income. However, Washington Gas is responsible for following competitive and reasonable practices in purchasing natural gas for its customers.

To manage price risk associated with its natural gas supply to its firm customers, Washington Gas: (i) actively manages its gas supply portfolio to balance sales and delivery obligations; (ii) injects natural gas into storage during the summer months when prices are historically lower, and withdraws that gas during the winter heating season when prices are historically higher and (iii) enters into hedging contracts and other contracts that qualify as derivative instruments related to the sale and purchase of natural gas.

Washington Gas executes commodity-related physical and financial contracts in the form of forward, futures and option contracts as part of an asset optimization program that is managed by its internal staff. Under this program, Washington Gas realizes value from its long-term natural gas transportation and storage capacity resources when they are not being fully used to serve utility customers. Regulatory sharing mechanisms in all three jurisdictions allow the profit from these transactions to be shared between Washington Gas’ customers and shareholders.

The following two tables summarize the changes in the fair value of our net assets (liabilities) associated with the Regulated Utility segment’s energy-related derivatives during the nine months ended June 30, 2015:

Regulated Utility Segment Changes in Fair Value of Energy-Related Derivatives
(In millions)
Net assets (liabilities) at September 30, 2014	$	(282.2	)
Net fair value of contracts entered into during the period	5.8
Other changes in net fair value	(62.2		)
Realized net settlement of derivatives	26.9
Net assets (liabilities) at June 30, 2015	$	(311.7	)

Regulated Utility Segment Roll Forward of Energy-Related Derivatives
(In millions)
Net assets (liabilities) at September 30, 2014	$	(282.2	)
Recorded to income	(20.4		)
Recorded to regulatory assets/liabilities	(36.0		)
Realized net settlement of derivatives	26.9
Net assets (liabilities) at June 30, 2015	$	(311.7	)

69

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

The maturity dates of our net assets (liabilities) associated with the Regulated Utility segment’s energy-related derivatives recorded at fair value at June 30, 2015, is summarized in the following table based on the level of the fair value calculation under ASC Topic 820:

Regulated Utility Segment Maturity of Net Assets (Liabilities) Associated with our Energy-Related Derivatives
(In millions)	Remainder 2015			2016			2017			2018			2019			Thereafter			Total
Level 1 — Quoted prices in active markets	$	—		$	—		$	—		$	—		$	—		$	—		$	—
Level 2 — Significant other observable inputs	0.5			(2.5		)	(2.6		)	0.1			—			—			(4.5		)
Level 3 — Significant unobservable inputs	(2.8		)	(30.2		)	(41.9		)	(30.5		)	(27.9		)	(173.9		)	(307.2		)
Total net assets (liabilities) associated with our energy-related derivatives	$	(2.3	)	$	(32.7	)	$	(44.5	)	$	(30.4	)	$	(27.9	)	$	(173.9	)	$	(311.7	)

Refer to Note 8, Derivative and Weather-Related Instruments and Note 9, Fair Value Measurements of the Notes to Consolidated Financial Statements for a further discussion of our derivative activities and fair value measurements.

Price Risk Related to the Non-Utility Segments

Retail Energy-Marketing. Our retail energy-marketing subsidiary, WGL Energy Services, sells natural gas and electricity to retail customers at both fixed and indexed prices. WGL Energy Services must manage daily and seasonal demand fluctuations for these products with its suppliers. Price risk may exist to the extent WGL Energy Services does not closely match the timing and volume of natural gas and electricity it purchases with the related fixed price or indexed sales commitments. WGL Energy Services’ risk management policies and procedures are designed to minimize this risk.

A portion of WGL Energy Services’ annual natural gas sales volumes is subject to variations in customer demand associated with fluctuations in weather and other factors. Purchases of natural gas to fulfill retail sales commitments are generally made under fixed-volume contracts based on certain weather assumptions. If there is significant deviation from normal weather or from other factors that affect customer usage, purchase commitments may differ significantly from actual customer usage. To the extent that WGL Energy Services cannot match its customer requirements and supply commitments, it may be exposed to commodity price and volume variances, which could negatively impact expected gross margins (refer to the section entitled “Weather Risk” for further discussion of our management of weather risk). WGL Energy Services manages these risks through the use of derivative instruments, including financial products.

WGL Energy Services procures electricity supply under contract structures in which WGL Energy Services assumes the responsibility of matching its customer requirements with its supply purchases. WGL Energy Services assembles the various components of supply, including electric energy from various suppliers, and capacity, ancillary services and transmission service from the PJM Interconnection, a regional transmission organization, in matching its customer requirements obligations. While the capacity and transmission costs within PJM are generally stable and identifiable several years into the future, the cost of ancillary services which support the reliable operation of the transmission system does fluctuate as changes occur in the balance between generation and the consumption mix within the electric system. WGL Energy Services could be exposed to price risk associated with changes in ancillary costs due to lack of available forward market products to sufficiently hedge those risks. Commercial retail contracts for larger customers often include terms which permit WGL Energy Services to pass through regulatory approved changes in capacity and transmission costs, as well as some changes in ancillary costs. These terms reduce the price risk exposure related to these changes for WGL Energy Services.

To the extent WGL Energy Services has not sufficiently matched its customer requirements with its supply commitments, it could be exposed to electricity commodity price risk. WGL Energy Services manages this risk through the use of derivative instruments, including financial products.

WGL Energy Services’ electric business is also exposed to fluctuations in weather and varying customer usage. Purchases generally are made under fixed-price, fixed-volume contracts that are based on certain weather assumptions. If there are significant deviations in weather or usage from these assumptions, WGL Energy Services may incur price and volume variances that could negatively impact expected gross margins (refer to the section entitled “Weather Risk” for further discussion of our management of weather risk).

70

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

The following two tables summarize the changes in the fair value of our net assets (liabilities) associated with the Retail Energy-Marketing segment’s energy-related derivatives during the nine months ended June 30, 2015:

Retail Energy-Marketing Segment Changes in Fair Value of Energy-Related Derivatives
(In millions)
Net assets (liabilities) at September 30, 2014	$	(5.4	)
Net fair value of contracts entered into during the period	(6.5		)
Other changes in net fair value	(8.2		)
Realized net settlement of derivatives	(1.0		)
Net assets (liabilities) at June 30, 2015	$	(21.1	)

Retail Energy-Marketing Segment Roll Forward of Energy-Related Derivatives
(In millions)
Net assets (liabilities) at September 30, 2014	$	(5.4	)
Recorded to income	(14.5		)
Recorded to accounts payable	(0.2		)
Realized net settlement of derivatives	(1.0		)
Net assets (liabilities) at June 30, 2015	$	(21.1	)

The maturity dates of our net assets (liabilities) associated with the Retail Energy-Marketing segments’ energy-related derivatives recorded at fair value at June 30, 2015 is summarized in the following table based on the level of the fair value calculation under ASC Topic 820:

Retail Energy-Marketing Segment Maturity of Net Assets (Liabilities) Associated with our Energy-Related Derivatives
(In millions)	Remainder 2015			2016			2017			2018			2019		Thereafter		Total
Level 1 — Quoted prices in active markets	$	—		$	—		$	—		$	—		$	—	$	—	$	—
Level 2 — Significant other observable inputs	(4.3		)	(7.3		)	(0.8		)	(0.2		)	—		—		(12.6		)
Level 3 — Significant unobservable inputs	(0.3		)	(0.3		)	(7.4		)	(0.5		)	—		—		(8.5		)
Total net assets (liabilities) associated with our energy-related derivatives	$	(4.6	)	$	(7.6	)	$	(8.2	)	$	(0.7	)	$	—	$	—	$	(21.1	)

Refer to Note 8, Derivative and Weather-Related Instruments and Note 9, Fair Value Measurements of the Notes to Consolidated Financial Statements for further discussion of our derivative activities and fair value measurements.

Commercial Energy Systems. WGL Energy Systems sells electricity and RECs from distributed generation assets. The sale of electricity is under long term power purchase agreements (PPAs) with a general duration of 20 years, while the sale of RECs are usually under shorter term or immediate delivery contracts. Weather patterns have an effect on WGL Energy Systems solar generation assets to the extent that output is reduced. WGL Energy Systems mitigates this risk by negotiating unit contingency and other measures to limit exposure in the PPAs. WGL Energy Systems may also be exposed to REC price risk. The REC market has limited visibility to forward market prices. WGL Energy Systems mitigates this price risk by entering into bundled energy and REC long-term purchase agreements and independent forward REC sale agreements, when possible.

WGL Energy Systems also earns revenues by providing energy efficiency and sustainability solutions to governmental agencies using various contractual vehicles, including the area wide contract and earning margins between the price the solutions are sold, and the cost to design and build them. Margins may be eroded by an underestimation of costs. WGL Energy Systems also conducts business with government agencies and may face revenue risk when such government agencies do not receive appropriations funding or projects are unfunded by Congress.

WGSW holds project financing arrangements and a limited partnership interest associated with distributed generating solar assets for a fair market value based on an independent appraisal. The project financing arrangements allow WGSW to lease back those solar assets to the counterparty with a fixed target rate of return over a period of 6-20 years. WGSW may also enter into limited partnership interests where solar assets are purchased by and leased to retail customers through the partnership. The purchased solar assets are expected to achieve a target rate of return from the lease payments being collected from the retail

71

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

customers. WGSW manages this price risk through its investment agreements and evaluation of the asset purchase in conjunction with the inception of the lease.

Midstream Energy Services. WGL Midstream engages in wholesale commodity transactions to optimize its owned and managed natural gas assets. Price risk exists to the extent WGL Midstream does not closely match the volume of physical natural gas in storage with the related forward sales entered into as hedges. WGL Midstream mitigates this risk by actively managing and hedging these assets in accordance with corporate risk management policies and procedures. Depending upon the nature of its forward hedges, WGL Midstream may also be exposed to fluctuations in mark-to-market valuations based on changes in forward price curves. WGL Midstream pays fixed, fair market prices for its owned storage assets and is subject to variations in annual summer-winter spreads associated with weather and other market factors. To the extent there are significant variations in weather, WGL Midstream may incur price variances that negatively impact expected gross margins (refer to the section entitled “Weather Risk” for further discussion of our management of weather risk). WGL Midstream manages this risk through the use of derivative instruments, including financial products.

The following two tables summarize the changes in the fair value of our net assets (liabilities) associated with the Midstream Energy Services segments’ energy-related derivatives during the nine months ended June 30, 2015:

Midstream Energy Services Segment Changes in Fair Value of Energy-Related Derivatives
(In millions)
Net assets (liabilities) at September 30, 2014	$	(29.0	)
Net fair value of contracts entered into during the period	34.8
Other changes in net fair value	(10.2		)
Realized net settlement of derivatives	(42.4		)
Net assets (liabilities) at June 30, 2015	$	(46.8	)

Midstream Energy Services Segment Roll Forward of Energy-Related Derivatives
(In millions)
Net assets (liabilities) at September 30, 2014	$	(29.0	)
Recorded to income	24.6
Realized net settlement of derivatives	(42.4		)
Net assets (liabilities) at June 30, 2015	$	(46.8	)

The maturity dates of our net assets (liabilities) associated with the Midstream Energy Services segments’ energy-related derivatives recorded at fair value at June 30, 2015 is summarized in the following table based on the level of the fair value calculation under ASC Topic 820:

Midstream Energy Services Segment Maturity of Net Assets (Liabilities) Associated with our Energy-Related Derivatives
(In millions)	Remainder 2015			2016			2017			2018			2019			Thereafter			Total
Level 1 — Quoted prices in active markets	$	—		$	—		$	—		$	—		$	—		$	—		$	—
Level 2 — Significant other observable inputs	(4.1		)	1.0			0.3			0.1			—			—			(2.7		)
Level 3 — Significant unobservable inputs	0.1			(7.3		)	(7.6		)	(7.7		)	(5.2		)	(16.4		)	(44.1		)
Total net assets associated with our energy-related derivatives	$	(4.0	)	$	(6.3	)	$	(7.3	)	$	(7.6	)	$	(5.2	)	$	(16.4	)	$	(46.8	)

Refer to Note 8, Derivative and Weather-Related Instruments and Note 9, Fair Value Measurements of the Notes to Consolidated Financial Statements for further discussion of our derivative activities and fair value measurements.

72

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

Value-at-Risk

WGL Energy Services measures the market risk of its energy commodity portfolio by determining its value-at-risk. Value-at-risk is an estimate of the maximum loss that can be expected at some level of probability if a portfolio is held for a given time period. The value-at-risk calculation for natural gas and electric portfolios include assumptions for normal weather, new customers and renewing customers for which supply commitments have been secured. Based on a 95% confidence interval for a one-day holding period, WGL Energy Services’ value-at-risk at June 30, 2015 was approximately $66,200 and $28,400, related to its natural gas and electric portfolios, respectively. WGL Energy Services’ value-at-risk for the natural gas and electric portfolios fluctuate relative to market prices and portfolio composition. The high, low and average value-at-risk for natural gas and electric portfolios between the period October 1, 2014 and June 30, 2015 are noted in the table below.

WGL Energy Services Value-at-Risk
(In thousands)	High		Low		Average
Natural Gas	$	102.8	$	12.2	$	52.3
Electric Portfolio	95.6		9.1		30.7
Total	$	198.4	$	21.3	$	83.0

Weather Risk

We are exposed to various forms of weather risk in both our regulated utility and non-utility business segments. To the extent Washington Gas does not have weather related instruments or billing adjustment mechanisms in place, its revenues are volume driven and its current rates are based upon an assumption of normal weather. Without weather protection strategies, variations from normal weather will cause our earnings to increase or decrease depending on the weather pattern.

The financial results of our retail energy-marketing business, WGL Energy Services, are affected by variations from normal weather primarily in the winter relating to its natural gas sales, and throughout the fiscal year relating to its electricity sales. WGL Energy Services manages these weather risks with, among other things, weather related instruments. Weather patterns have an effect on WGL Energy Systems solar generation assets to the extent that output is reduced. WGL Energy Systems mitigates this risk by negotiating unit contingency and other measures to limit exposure in the PPAs.

Variations from normal weather may also affect the financial results of our wholesale energy business, WGL Midstream, primarily with regards to summer-winter storage spreads and in transportation spreads throughout the fiscal year. WGL Midstream manages these weather risks with, among other things, location, physical and financial basis hedging.

Billing Adjustment Mechanisms. In Maryland, Washington Gas has a Revenue Normalization Adjustment (RNA) billing mechanism that is designed to stabilize the level of net revenues collected from Maryland customers by eliminating the effect of deviations in customer usage caused by variations in weather from normal levels and other factors such as conservation. In Virginia, Washington Gas has a Weather Normalization Adjustment (WNA) billing adjustment mechanism that is designed to eliminate the effect of variations in weather from normal levels on utility net revenues. Additionally, in Virginia, as part of the Conservation and Ratemaking Efficiency (CARE) plan, Washington Gas has a CARE Ratemaking Adjustment (CRA) mechanism that, in conjunction with the WNA, eliminates the effect of both weather and other factors such as conservation for residential, small commercial and industrial and group metered apartment customers.

For the RNA, WNA and CRA mechanisms, periods of colder-than-normal weather generally would cause Washington Gas to record a reduction to its revenues and establish a refund liability to customers, while the opposite would generally result during periods of warmer-than-normal weather. However, factors such as volatile weather patterns and customer conservation may cause the RNA and the CRA mechanisms to function conversely because they adjust billed revenues to provide a designed level of net revenue per meter.

Weather-Related Instruments. WGL Energy Services utilizes heating degree day (HDD) instruments from time to time to manage weather risks related to its natural gas and electricity sales. WGL Energy Services also utilizes cooling degree day (CDD) instruments and other instruments to manage weather and price risks related to its electricity sales during the summer cooling season. These instruments cover a portion of WGL Energy Services’ estimated revenue or energy-related cost exposure to variations in HDDs or CDDs. Refer to Note 8—Derivative and Weather Related Instruments of the Notes to Consolidated Financial Statements for further discussion of the accounting for these weather-related instruments.

73

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

Interest-Rate Risk

We are exposed to interest-rate risk associated with our short-term and long-term financing. WGL and Washington Gas utilize derivative instruments from time to time in order to minimize its exposure to the risk of interest-rate volatility.

Short-Term Debt. At June 30, 2015 and September 30, 2014, WGL and its subsidiaries had outstanding notes payable of $156.0 million and $453.5 million, respectively. The carrying amount of our short-term debt approximates fair value. In the current quarter, a change of 100 basis points in the underlying average interest rate for our short-term debt would have caused a change in interest expense of approximately $2.1 million.

Long-Term Debt. At June 30, 2015, we had outstanding fixed-rate MTNs and other long-term debt of $950.5 million, excluding current maturities and unamortized discounts. While fixed-rate debt does not expose us to earnings risk when market interest rates change, such debt is subject to changes in fair value. Fair value is defined as the present value of the debt securities’ future cash flows discounted at interest rates that reflect market conditions as of the measurement date. As of June 30, 2015, the fair value of WGL’s fixed-rate debt was $1,033.5 million. Our sensitivity analysis indicates that fair value would increase by approximately $49.4 million or decrease by approximately $45.3 million if interest rates were to decline or increase by 10%, respectively, from current market levels. As of June 30, 2015, the fair value of Washington Gas’ fixed-rate debt was $795.9 million. Our sensitivity analysis indicates that fair value would increase by approximately $36.9 million or decrease by approximately $34.0 million if interest rates were to decline or increase by 10%, respectively, from current market levels. In general, such an increase or decrease in fair value would impact earnings and cash flows only if WGL or Washington Gas were to reacquire some or all of these instruments in the open market prior to their maturity.

A total of $802.5 million, or approximately 84.8%, of WGL’s outstanding long-term debt, excluding current maturities, have make-whole call options which, if exercised, would require us to pay a premium over the face amount.

A total of $552.5 million, or approximately 79.4%, of Washington Gas’ outstanding MTNs, excluding current maturities, have make-whole call options which, if exercised, would require us to pay a premium over the face amount.

Derivative Instruments. WGL and Washington Gas utilize derivative instruments from time to time in order to minimize its exposure to the risk of interest-rate volatility. During September 2014, WGL entered into interest rate swaps in anticipation of its $150.0 million 30-year debt issuance completed in October and December of 2014. WGL elected cash flow hedge accounting for these interest rate derivative instruments. Therefore, the effective portion of the gains and losses on the hedge were recorded within other comprehensive income and will be amortized over the life of the underlying debt (through 2044). In connection with the issuance of $125.0 million of debt on October 22, 2014, WGL settled a portion of the interest rate hedge for a loss of $7.7 million. On December 15, 2014, WGL settled the remaining portion of the outstanding interest rate swap when it issued $25.0 million of MTN’s, for a loss of $2.6 million. During the three months ended June 30, 2015, no amount was recorded to income as a result of the ineffective portion of the interest rate swap. During the nine months ended June 30, 2015, a total of $0.4 million was recorded to income as a result of the ineffective portion of the interest rate swap. Refer to the section entitled “Long-Term Cash Requirements and Related Financing” for further discussion of our interest-rate risk management activity.

74

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

WASHINGTON GAS LIGHT COMPANY

This section of Management’s Discussion focuses on Washington Gas for the reported periods. In many cases, explanations and disclosures for both WGL and Washington Gas are substantially the same.

RESULTS OF OPERATIONS—Three Months Ended June 30, 2015 vs. June 30, 2014

The results of operations for the regulated utility segment and Washington Gas are substantially the same; therefore, this section primarily focuses on statistical information and other information that is not discussed in the results of operations for the regulated utility segment. Refer to the section entitled “Results of Operations—Regulated Utility” in Management’s Discussion for WGL for a detailed discussion of the results of operations for the regulated utility segment.

Key gas delivery, weather and meter statistics are shown in the table below for the three months ended June 30, 2015 and 2014.

Gas Deliveries, Weather and Meter Statistics
	Three Months Ended June 30,				Increase/
	2015		2014		(Decrease)
Gas Sales and Deliveries(millions of therms)
Firm
Gas sold and delivered	98.1		93.2		4.9
Gas delivered for others	67.1		76.4		(9.3	)
Total firm	165.2		169.6		(4.4	)
Interruptible
Gas sold and delivered	0.3		0.3		—
Gas delivered for others	46.7		52.7		(6.0	)
Total interruptible	47.0		53.0		(6.0	)
Electric generation—delivered for others	57.9		33.9		24.0
Total deliveries	270.1		256.5		13.6
Degree Days
Actual	203		277		(74	)
Normal	296		295		1
Percent colder (warmer) than normal	(31.4	)%	(6.1	)%	n/a
Average active customer meters	1,132,904		1,119,953		12,951
New customer meters added	2,501		2,913		(412	)

Gas Service to Firm Customers. The volume of gas delivered to firm customers is highly sensitive to weather variability as a large portion of the natural gas delivered by Washington Gas is used for space heating. Washington Gas’ rates are based on an assumption of normal weather. The RNA in Maryland and the WNA and CRA in Virginia are mechanisms designed to, among other things, eliminate the effect on net revenues of variations in weather from normal levels (refer to the section entitled “Weather Risk” for a further discussion of these mechanisms and other weather-related instruments included in our weather protection strategy).

This comparison in natural gas deliveries to firm customers primarily reflects warmer weather in the current quarter than in the same quarter of the prior year and an increase in average active customer meters of 12,951.

Gas Service to Interruptible Customers. Washington Gas must curtail or interrupt service to this class of customer when the demand by firm customers exceeds specified levels.

In the District of Columbia, the effect on net income of any changes in delivered volumes and prices to interruptible customers is limited by margin-sharing arrangements that are included in Washington Gas’ firm rate designs. Rates for interruptible customers in Maryland and Virginia are based on a traditional cost of service approach. In Virginia, Washington Gas retains a majority of the margins earned on interruptible gas and delivery sales. Washington Gas shares actual non-gas margins from interruptible sales service customers that are in excess of delivery service rates. In Maryland, Washington Gas

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WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

retains a defined amount of revenues based on a set threshold. The comparison for the current quarter compared to the prior quarter primarily reflects warmer weather in the current quarter, as well as conversions of certain interruptible customers to firm service.

Gas Service for Electric Generation. Washington Gas delivers natural gas for use at two electric generation facilities in Maryland that are each owned by companies independent of WGL. Washington Gas shares with firm customers a significant majority of the margins earned from natural gas deliveries to these customers. Therefore, changes in the volume of interruptible gas deliveries to these customers do not materially affect either net revenues or net income.

Interest Expense

The following table shows the components of Washington Gas' interest expense for the three months ended June 30, 2015 and 2014. The increase in interest on long-term debt primarily comprises private placement notes and unsecured MTNs issued by Washington Gas.

Composition of Interest Expense
	Three Months Ended June 30,				Increase/
(In millions)	2015		2014		(Decrease)
Interest on long-term debt	$	10.7	$	9.3	$	1.4
Allowance for funds used during construction and other- net	—		0.1		(0.1		)
Total	$	10.7	$	9.4	$	1.3

Income Taxes

Please refer to the nine months ended June 30, 2015, for information about Washington Gas’ income tax expense and effective income tax rate.

RESULTS OF OPERATIONS - Nine Months EndedJune 30, 2015 vs. June 30, 2014

Key gas delivery, weather and meter statistics are shown in the table below for the nine months ended June 30, 2015 and 2014.

Gas Deliveries, Weather and Meter Statistics
	Nine Months Ended June 30,				Increase/
	2015		2014		(Decrease)
Gas Sales and Deliveries(millions of therms)
Firm
Gas sold and delivered	883.8		885.4		(1.6	)
Gas delivered for others	506.2		485.3		20.9
Total firm	1,390.0		1,370.7		19.3
Interruptible
Gas sold and delivered	1.8		1.8		—
Gas delivered for others	217.8		222.5		(4.7	)
Total interruptible	219.6		224.3		(4.7	)
Electric generation—delivered for others	113.1		93.0		20.1
Total deliveries	1,722.7		1,688.0		34.7
Degree Days
Actual	3,929		4,111		(182	)
Normal	3,746		3,738		8
Percent colder (warmer) than normal	4.9	%	10.0	%	n/a
Average active customer meters	1,129,159		1,116,530		12,629
New customer meters added	9,048		9,963		(915	)

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WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

Gas Service to Firm Customers. The comparison in natural gas deliveries to firm customers primarily reflects an increase of average active customer meters of 12,629, as well as changes in natural gas consumption patterns, partially offset by warmer weather in the current period than in the same period of the prior year.

Gas Service to Interruptible Customers. The comparison for the current period compared to the prior period primarily reflects lower interruptible demand in the current period, as well as conversions of certain interruptible customers to firm service.

Gas Service for Electric Generation. Washington Gas delivers natural gas for use at two electric generation facilities in Maryland that are each owned by companies independent of WGL. Washington Gas shares with firm customers a significant majority of the margins earned from natural gas deliveries to these customers. Therefore, changes in the volume of interruptible gas deliveries to these customers do not materially affect either net revenues or net income.

Interest Expense

The following table shows the components of Washington Gas' interest expense for the nine months ended June 30, 2015 and 2014. The increase in interest on long-term debt primarily comprises new private placements notes issued by Washington Gas.

Composition of Interest Expense
	Nine Months Ended June 30,				Increase/
(In millions)	2015		2014		(Decrease)
Interest on long-term debt	$	31.4	$	27.4	$	4.0
Allowance for funds used during construction and other- net	0.1		0.3		(0.2		)
Total	$	31.5	$	27.7	$	3.8

Income Taxes

The following table shows Washington Gas' income tax expense and effective income tax rate for the nine months ended June 30, 2015 and 2014.

Income Taxes
	Nine Months Ended June 30,						Increase/
(In millions)	2015			2014			(Decrease)
Income before income taxes	$	205.6		$	129.5		$	76.1
Income tax expense	$	77.4		$	41.4		$	36.0
Effective income tax rate	37.6		%	32.0		%	5.6		%

The increase in the effective income tax rate, when comparing the nine months ended June 30, 2015 and 2014, is a result of the tax benefit recorded during the first quarter of fiscal year 2014 for the reinstatement of regulatory assets related to the tax effect of Med D, causing the rate to be lower during the prior year period. Refer to Note 9—Income Taxes of the Notes to the Consolidated Financial Statements of our combined Annual Report on Form 10-K for details.

LIQUIDITY AND CAPITAL RESOURCES

Liquidity and capital resources for Washington Gas are substantially the same as the liquidity and capital resources discussion included in the Management’s Discussion of WGL (except for certain items and transactions that pertain to WGL and its unregulated subsidiaries). Those explanations are incorporated by reference into this discussion.

RATES AND REGULATORY MATTERS

Washington Gas makes its requests to modify existing rates based on its determination of the level of net investment in plant and equipment, operating expenses, and a level of return on invested capital that is just and reasonable. The following is an update of significant current regulatory matters in each of Washington Gas’ jurisdictions. For a more detailed discussion of the

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WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

matters below, refer to our combined Annual Report on Form 10-K for WGL and Washington Gas for the fiscal year ended September 30, 2014.

District of Columbia Jurisdiction

Accelerated Pipe Replacement Plan. On August 15, 2013, Washington Gas filed a request for approval with the Public Service Commission of the District of Columbia (PSC of DC) of a Revised Accelerated Pipe Replacement Plan (APRP), including a surcharge mechanism to recover the associated costs for the first five years of the plan. Washington Gas proposed to replace bare and/or unprotected steel services, bare and targeted unprotected steel main, and cast iron main in its distribution system in the District of Columbia at an estimated five-year cost of $110 million. The PSC of DC granted final approval of the APRP in August 2014, but opened a separate proceeding to consider the issue of the appropriate APRP cost recovery mechanism. On December 10, 2014, Washington Gas filed a joint motion, on behalf of all parties to the proceeding, requesting approval of a unanimous settlement agreement on the cost recovery issue. The settlement agreement authorizes a surcharge to recover the costs of the first five years of the accelerated pipe replacement program, including replacement activity starting in June of 2014. On January 29, 2015, the PSC of DC issued an order approving the settlement agreement. On May 19, 2015 an order was issued directing Washington Gas to modify its customer education plan to include the establishment of a dedicated hotline and email address for APRP matters.

Investigation into Washington Gas’ Cash Reimbursement to Competitive Service Providers (CSPs). On August 5, 2014, the Office of the People’s Counsel’s (“OPC”) of DC filed a complaint with the PSC of DC requesting that the Commission open an investigation into Washington Gas’ payments to CSPs who over-delivered natural gas supplies by $2.4 million during the 2008-2009 winter heating season. On December 19, 2014, the PSC of DC granted the OPC of DC’s request and opened a formal investigation. On June 11, 2015 the PSC of DC issued an order to render a partial summary judgment unless an objection was filed. The order did not specify what decision would be rendered under such summary judgment. On June 22, 2015, Washington Gas filed an opposition to partial summary judgment, and the OPC filed a response to the order. Washington Gas responded to OPC’s response on June 26, 2015. On July 23, 2015, the PSC of DC issued an order establishing a briefing schedule to address the issue of whether Washington Gas acted outside its applicable tariff by cashing out CSP over-deliveries of natural gas supplies.  Initial briefs are due within 30 days, and reply briefs are due within 45 days.

Weather Normalization Adjustment. On November 8, 2013, Washington Gas filed an application for approval of a Weather Normalization Adjustment (WNA) before the PSC of DC. The proposal would authorize Washington Gas to implement a rate design mechanism that would eliminate the variability of weather from the calculation of revenues and offer customers more stability in their bills, during the colder than normal winter heating season. On April 10, 2015, the PSC of DC denied Washington Gas' application for approval of a WNA, indicating that Washington Gas may request a WNA in its next base rate case.

Maryland Jurisdiction

Maryland Strategic Infrastructure Development and Enhancement Plan. On November 7, 2013, pursuant to the STRIDE law in Maryland, Washington Gas filed an application with the Public Service Commission of Maryland ("PSC of MD") for authority to implement a STRIDE Plan and to recover the reasonable and prudent costs associated with the infrastructure replacements through monthly surcharges. On May 6, 2014, the PSC of MD issued an order approving Washington Gas' first STRIDE Plan. On June 5, 2014, the Maryland Office of People’s Counsel filed an appeal of the PSC of MD’s May 6, 2014 order with the Circuit Court for Baltimore City. Washington Gas filed a notice on June 13, 2014 that it intended to participate in the appeal. On October 29, 2014, the parties to the appeal jointly requested that the proceedings be stayed pending the outcome of the appeal of a Baltimore Gas & Electric Company case that may be dispositive of the issues in the Washington Gas proceeding.

On December 18, 2014, the PSC of MD issued a letter order approving Washington Gas’ 2015 STRIDE project list targeting approximately $37 million in capital expenditures and surcharge factor subject to adjustments made by the staff of the PSC of MD.

On March 10, 2015, Washington Gas filed an application with the PSC of MD for approval of an amendment to the approved STRIDE Plan. Washington Gas requested approval to add one additional program applicable to gas distribution system replacements and four additional programs applicable to gas transmission system replacements at an incremental investment of $31.2 million in eligible infrastructure replacements over the remaining four years of the STRIDE Plan. On May

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WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

Item 2—Management’s Discussion and Analysis of

Financial Condition and Results of Operations (continued)

27, 2015, the Chief Public Utility Law Judge issued a proposed order approving, with modification, the proposed amendment to the approved STRIDE Plan. The proposed order allowed accelerated recovery through the surcharge mechanism of costs related to transmission system replacements located in Maryland, but disallowed accelerated recovery through the surcharge mechanism of costs related to transmission system replacements physically located outside of Maryland. Washington Gas appealed that portion of the decision in the proposed order disallowing accelerated cost recovery for transmission system replacements physically located outside of Maryland. On July 2, 2015, the PSC of MD issued Order No. 87064 affirming the proposed order. Under Order No. 87064, Washington Gas will be able to recover costs related to transmission plant replacements on an accelerated basis for projects located in Maryland, and through the normal base rate recovery mechanism for projects located outside Maryland. On July 30, 2015, Washington Gas filed an appeal of Order No. 87064 with the Circuit Court for Montgomery County to challenge the PSC of MD’s decision to deny recovery through the surcharge mechanism of costs related to transmission system replacement projects located outside of Maryland.

Virginia Jurisdiction

Affiliate Transactions. On June 5, 2013, Washington Gas submitted a petition for declaratory judgment  with the State Corporations Commission of Virginia ("SCC of VA") related to a proposed transfer to WGL Midstream of the remainder of the term of two agreements for natural gas storage service at the Washington Storage Service (WSS) and Eminence Storage Service (ESS) storage fields.  Specifically, Washington Gas sought a declaratory judgment that the SCC of VA did not have jurisdiction over the proposed transaction since the WSS and ESS agreements were no longer utilized to provide utility service and the SCC of VA was preempted by the federal authority over the transfers.  On April 15, 2015, the SCC of VA approved the transfer of WSS and ESS but did not issue a ruling on the request for declaratory judgment.

Steps to Advance Virginia's Energy Plan (SAVE) - Plan Amendment. On February 6, 2015, Washington Gas submitted an application to the SCC of VA requesting approval to amend its SAVE Plan to expand the scope of some existing programs, to include new distribution facilities replacement programs, and to add new programs to replace transmission facilities. Washington Gas proposed investing an additional $75.2 million to replace Virginia eligible infrastructure over the 2015-2017 period. On June 5, 2015, the SCC of VA approved the amended SAVE Plan; however the Commission denied a portion of the proposal to replace transmission facilities and a portion of the proposal to include new distribution facilities. The SCC of VA approved an incremental capital expenditure of $66 million through 2017. The new incremental factor began on August 1, 2015.

Virginia Gas Reserves. In the 2014 Session, the General Assembly of the Commonwealth of Virginia amended Title 56 of the Virginia Code. The legislative provisions are intended to encourage regulated utilities to invest in natural gas reserves, upstream pipelines and facilities that are reasonably expected to benefit customers by lowering costs, reducing volatility or lowering the utility’s supply risk. A regulated utility company can obtain the recovery through its rates charged to customers for the entire incurred cost, including the return of and a return on the investment in reserves, as well as all operating costs.

Pursuant to the law, on May 6, 2015, Washington Gas entered into a 20-year agreement with Energy Corporation of America (ECA) to acquire natural gas reserves through non-operating working interests in 25 producing wells located in Pennsylvania's Appalachian Basin for $126 million.

The purchase of the reserves is conditional upon approval by the SCC of VA. Washington Gas filed an application with the SCC of VA on May 12, 2015, for approval of the gas reserves purchase agreement with ECA as part of a Natural Gas Supply Investment Plan. Under a procedural schedule established by the SCC of VA to consider the application, a public hearing is scheduled on September 30, 2015. Under the law, the SCC of VA must issue a final decision on the application within 180 days, or by November 8, 2015.

Other Matters

New Labor Contract.Washington Gas entered into a new five-year labor contract with the Teamsters Local Union No. 96 (Local 96), a union affiliated with the International Brotherhood of Teamsters. The contract covers approximately 520 employees. The Teamsters ratified the contract on April 30, 2015 and is effective from June 1, 2015 through May 31, 2020. The contract includes, among other things: (i) annual wage increases from 2.75% to 3.25% and (ii) employment protection for each Local 96 employee from the date of commencement of the contract.

79

WGL Holdings, Inc.

Washington Gas Light Company

Part I—Financial Information

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

The following issues related to our market risks are included under Item 2, Management’s Discussion and Analysis of Financial Condition and Results of Operations, and are incorporated by reference into this discussion.

• Price Risk Related to the Regulated Utility Segment

• Price Risk Related to the Non-Utility Segments

• Value-At-Risk

• Weather Risk

• Interest-Rate Risk

ITEM 4. CONTROLS AND PROCEDURES—WGL Holdings, Inc.

Senior management, including the Chairman and Chief Executive Officer and the Senior Vice President and Chief Financial Officer of WGL, evaluated the effectiveness of WGL’s disclosure controls and procedures (as such term is defined in Rule 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934) as of June 30, 2015. Based on this evaluation process, the Chairman and Chief Executive Officer and the Senior Vice President and Chief Financial Officer have concluded that disclosure controls and procedures of WGL are effective. There have been no changes in the internal control over financial reporting of WGL during the quarter ended June 30, 2015 that have materially affected, or are reasonably likely to materially affect, the internal control over financial reporting of WGL.

ITEM 4. CONTROLS AND PROCEDURES—Washington Gas Light Company

Senior management, including the Chairman and Chief Executive Officer and the Senior Vice President and Chief Financial Officer of Washington Gas, evaluated the effectiveness of the disclosure controls and procedures (as such term is defined in Rule 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934) of Washington Gas as of June 30, 2015. Based on this evaluation process, the Chairman and Chief Executive Officer and the Senior Vice President and Chief Financial Officer have concluded that the disclosure controls and procedures of Washington Gas are effective. There have been no changes in the internal control over financial reporting of Washington Gas during the quarter ended June 30, 2015 that have materially affected, or are reasonably likely to materially affect, the internal control over financial reporting of Washington Gas.

80

WGL Holdings, Inc.

Washington Gas Light Company

Part II—Other Information

ITEM 1. LEGAL PROCEEDINGS

The nature of our business ordinarily results in periodic regulatory proceedings before various state and federal authorities. For information regarding pending federal and state regulatory matters, see Note 13—Commitments and Contingencies of the Notes to Condensed Consolidated Financial Statements.

ITEM 4. MINE SAFETY DISCLOSURES

Not applicable.

ITEM 6. EXHIBITS

Exhibits:

Schedule/ Exhibit	Description
(a)(3)	Exhibits
	Exhibits Filed Herewith:
31.1	Certification of Terry D. McCallister, the Chairman and Chief Executive Officer of WGL Holdings, Inc., pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.2	Certification of Vincent L. Ammann, Jr., the Senior Vice President and Chief Financial Officer of WGL Holdings, Inc., pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.3	Certification of Terry D. McCallister, the Chairman and Chief Executive Officer of Washington Gas Light Company, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
31.4	Certification of Vincent L. Ammann, Jr., the Senior Vice President and Chief Financial Officer of Washington Gas Light Company, pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
32	Certification of Terry D. McCallister, the Chairman and Chief Executive Officer, and Vincent L. Ammann, Jr., the Senior Vice President and Chief Financial Officer, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
101.INS	XBRL Instance Document
101.SCH	XBRL Schema Document
101.CAL	XBRL Calculation Linkbase Document
101.LAB	XBRL Labels Linkbase Document
101.PRE	XBRL Presentation Linkbase Document
101.DEF	XBRL Definition Linkbase Document

81

WGL Holdings, Inc.

Washington Gas Light Company

Signature

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrants have duly caused this report to be signed on their behalf by the undersigned, thereunto duly authorized.

	WGL HOLDINGS, INC. and WASHINGTON GAS LIGHT COMPANY (Co-registrants)
Date: August 5, 2015	/s/ William R. Ford
	William R. Ford
	Vice President and Chief Accounting Officer (Principal Accounting Officer)

82

EX-31.1

WGL Holdings, Inc.

Washington Gas Light Company

Exhibit 31.1

CERTIFICATION OF WGL HOLDINGS, INC.

I, Terry D. McCallister, certify that:

1. I have reviewed this quarterly report on Form 10-Q of WGL Holdings, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors:

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 5, 2015

/s/ Terry D. McCallister

Terry D. McCallister

Chairman and Chief Executive Officer

EX-31.2

WGL Holdings, Inc.

Washington Gas Light Company

Exhibit 31.2

CERTIFICATION OF WGL HOLDINGS, INC.

I, Vincent L. Ammann, Jr., certify that:

1. I have reviewed this quarterly report on Form 10-Q of WGL Holdings, Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors:

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 5, 2015

/s/ Vincent L. Ammann, Jr.

Vincent L. Ammann, Jr.

Senior Vice President and Chief Financial Officer

EX-31.3

WGL Holdings, Inc.

Washington Gas Light Company

Exhibit 31.3

CERTIFICATION OF WASHINGTON GAS LIGHT COMPANY

I, Terry D. McCallister, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Washington Gas Light Company;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors:

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 5, 2015

/s/ Terry D. McCallister

Terry D. McCallister

Chairman and Chief Executive Officer

EX-31.4

WGL Holdings, Inc.

Washington Gas Light Company

Exhibit 31.4

CERTIFICATION OF WASHINGTON GAS LIGHT COMPANY

I, Vincent L. Ammann, Jr., certify that:

1. I have reviewed this quarterly report on Form 10-Q of Washington Gas Light Company;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors:

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: August 5, 2015

/s/ Vincent L. Ammann, Jr.

Vincent L. Ammann, Jr.

Senior Vice President and Chief Financial Officer

EX-32

WGL Holdings, Inc.

Washington Gas Light Company

Exhibit 32

CERTIFICATION OF THE CHAIRMAN AND CHIEF EXECUTIVE OFFICER

AND THE SENIOR VICE PRESIDENT AND CHIEF FINANCIAL OFFICER

PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the combined Quarterly Report of WGL Holdings, Inc. and Washington Gas Light Company (the “Companies”) on Form 10-Q for the quarterly period ended June 30, 2015 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), Terry D. McCallister, Chairman and Chief Executive Officer of the Companies, and Vincent L. Ammann, Jr., Senior Vice President and Chief Financial Officer of the Companies, each hereby certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, to the best of their knowledge, that:

(1) The Report fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Companies.

This certification is being made for the exclusive purpose of compliance by the Chairman and Chief Executive Officer and the Senior Vice President and Chief Financial Officer of the Companies with the requirements of Section 906 of the Sarbanes-Oxley Act of 2002, and may not be disclosed, distributed, or used by any person for any reason other than as specifically required by law.

/s/ Terry D. McCallister

Terry D. McCallister

Chairman and Chief Executive Officer

/s/ Vincent L. Ammann, Jr.

Vincent L. Ammann, Jr.

Senior Vice President and Chief Financial Officer

August 5, 2015

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Long-Term Debt (Details) - USD ($)		9 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Sep. 30, 2014
Total Consolidated
Debt Instrument [Line Items]
Long-term notes	[1]	$ 991,000,000		$ 691,000,000
Interest rate		5.08%		5.65%
WGL | Issuances
Debt Instrument [Line Items]
Long-term notes	[2],[3]	$ 250,000,000
WGL | Total Consolidated
Debt Instrument [Line Items]
Long-term notes	[1],[4]	$ 250,000,000		$ 0
Interest rate	[4]	3.66%
WGL | 11/1/2019 | Issuances
Debt Instrument [Line Items]
Interest rate	[3]	2.25%
Issuance Date	[3]	Oct. 24, 2014
Principal	[2],[3]	$ 100,000,000
Effective cost	[3],[5]	2.42%
Nominal Maturity Date	[3]	Nov. 01, 2019
WGL | 11/1/2044 | Issuances
Debt Instrument [Line Items]
Interest rate	[3]	4.60%
Issuance Date	[3]	Oct. 24, 2014
Principal	[2],[3]	$ 125,000,000
Effective cost	[3],[5]	5.11%
Nominal Maturity Date	[3]	Nov. 01, 2044
WGL | 11/1/2044 | Issuances
Debt Instrument [Line Items]
Interest rate	[3]	4.60%
Issuance Date	[3]	Dec. 16, 2014
Principal	[2],[3]	$ 25,000,000
Effective cost	[3],[5]	5.53%
Nominal Maturity Date	[3]	Nov. 01, 2044
Washington Gas Light Company | Total consolidated issuances
Debt Instrument [Line Items]
Long-term notes	[2]	$ 300,000,000
Washington Gas Light Company | Issuances
Debt Instrument [Line Items]
Long-term notes	[2]	$ 50,000,000	$ 75,000,000
Interest rate		4.24%	5.00%
Issuance Date		Dec. 15, 2014	Dec. 05, 2013
Principal	[2]	$ 50,000,000	$ 75,000,000
Effective cost	[5]	4.41%	4.95%
Nominal Maturity Date		Dec. 15, 2044	Dec. 15, 2043
Washington Gas Light Company | Retirements
Debt Instrument [Line Items]
Long-term notes	[2]		$ 37,000,000
Interest rate			4.88%
Principal	[2]		$ 37,000,000
Nominal Maturity Date			Nov. 07, 2013
Retirement Date			Nov. 07, 2013
Washington Gas Light Company | Total Consolidated
Debt Instrument [Line Items]
Long-term notes	[1]	$ 741,000,000		$ 691,000,000
Interest rate		5.56%		5.65%
Washington Gas Light Company | Medium-Term Notes
Debt Instrument [Line Items]
Unused borrowing capacity amount				$ 275,000,000

[1] Includes Senior Notes for WGL and both MTNs and private placement notes for Washington Gas. Represents face value including current maturities.

[2] Represents face amount.

[3] WGL includes WGL Holdings and all subsidiaries other than Washington Gas.

[4] WGL includes WGL Holdings and all subsidiaries other than Washington Gas.

[5] The estimated effective cost of the issued notes, including consideration of issuance fees and hedge costs.

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Operating Segment (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Sep. 30, 2014
Operating Segment Financial Information [Line Items]
Operating Revenues	[1]	$ 441,173	$ 467,500	$ 2,192,143	$ 2,322,047
Depreciation and Amortization		30,696	27,622	90,159	81,516
Equity in Earnings of Unconsolidated Affiliates		1,262	818	4,238	1,851
EBIT		(13,976)	(8,975)	249,711	130,064
Total Assets		5,008,465	4,560,684	5,008,465	4,560,684	$ 4,856,499
Capital Expenditures		102,769	94,249	317,043	241,450
Equity Method Investments		121,290	91,148	121,290	91,148
Other activities
Operating Segment Financial Information [Line Items]
Operating Revenues	[1]	0	0	0	0
Depreciation and Amortization		0	0	0	0
Equity in Earnings of Unconsolidated Affiliates		0	0	750	0
EBIT		(970)	(2,391)	(8,915)	(10,227)
Total Assets		106,861	224,220	106,861	224,220
Capital Expenditures		0	0	0	0
Equity Method Investments		0	413	0	413
Eliminations
Operating Segment Financial Information [Line Items]
Operating Revenues	[1],[2]	(6,294)	(3,982)	(22,176)	(23,714)
Depreciation and Amortization	[2]	(13)	(64)	(55)	(335)
Equity in Earnings of Unconsolidated Affiliates	[2]	0	0	0	0
EBIT	[2]	(541)	(532)	(592)	110
Total Assets	[2]	(492,363)	(502,662)	(492,363)	(502,662)
Capital Expenditures	[2]	0	0	0	0
Equity Method Investments	[2]	0	0	0	0
Regulated utility | Operating Segments
Operating Segment Financial Information [Line Items]
Operating Revenues	[1]	190,345	197,752	1,193,232	1,304,975
Depreciation and Amortization		27,740	25,840	81,958	76,945
Equity in Earnings of Unconsolidated Affiliates		0	0	0	0
EBIT		(6,262)	4,456	238,645	158,444
Total Assets		4,113,166	3,809,747	4,113,166	3,809,747
Capital Expenditures		75,413	76,073	235,707	181,821
Equity Method Investments		0	0	0	0
Retail energy-marketing | Operating Segments
Operating Segment Financial Information [Line Items]
Operating Revenues	[1]	268,249	275,339	1,003,339	1,035,711
Depreciation and Amortization		151	204	470	558
Equity in Earnings of Unconsolidated Affiliates		0	0	0	0
EBIT		16,654	1,286	39,185	5,186
Total Assets		464,086	387,990	464,086	387,990
Capital Expenditures		0	5	5	93
Equity Method Investments		0	0	0	0
Commercial energy systems | Operating Segments
Operating Segment Financial Information [Line Items]
Operating Revenues	[1]	14,674	14,260	35,745	27,013
Depreciation and Amortization		2,787	1,611	7,693	4,255
Equity in Earnings of Unconsolidated Affiliates		544	733	1,623	1,496
EBIT		3,750	5,012	4,731	5,961
Total Assets		613,124	459,509	613,124	459,509
Capital Expenditures		27,271	18,171	81,246	59,536
Equity Method Investments		64,323	68,309	64,323	68,309
Midstream energy services | Operating Segments
Operating Segment Financial Information [Line Items]
Operating Revenues	[1]	(25,801)	(15,869)	(17,997)	(21,938)
Depreciation and Amortization		31	31	93	93
Equity in Earnings of Unconsolidated Affiliates		718	85	1,865	355
EBIT		(26,607)	(16,806)	(23,343)	(29,410)
Total Assets		203,591	181,880	203,591	181,880
Capital Expenditures		85	0	85	0
Equity Method Investments		$ 56,967	$ 22,426	$ 56,967	$ 22,426

[1] Operating revenues are reported gross of revenue taxes. Revenue taxes of both the regulated utility and the retail energy-marketing segments include gross receipt taxes. Revenue taxes of the regulated utility segment also include public service commission fees, franchise fees and energy taxes. Operating revenue amounts in the “Eliminations” row represent total intersegment revenues associated with sales from the regulated utility segment to the retail energy-marketing segment. Midstream Energy Services’ cost of energy related sales is netted with its gross revenues.

[2] Intersegment eliminations include any mark-to market valuations associated with trading activities between WGL Midstream and WGL Energy Services, intercompany loans and a timing difference between Commercial Energy Systems’ recognition of revenue for the sale of Renewable Energy Credits (RECs) to Retail Energy-Marketing and Retail Energy-Marketing’s recognition of the associated expense. Retail Energy-Marketing has recorded a portion of the REC’s purchased as inventory to be used in future periods at which time they will be expensed.

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Fair Value Measurements (Quantitative information) (Details) $ in Millions	9 Months Ended	12 Months Ended
	Jun. 30, 2015 USD ($) $ / MwH $ / dekatherm	Sep. 30, 2014 USD ($) $ / MwH $ / dekatherm	Mar. 31, 2015 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Sep. 30, 2013 USD ($)
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Net Fair Value | $	$ (359.8)	$ (299.7)	$ (330.1)	$ (461.7)	$ (433.3)	$ (151.7)
Natural Gas Related Derivatives
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Net Fair Value | $	$ (351.0)	$ (294.7)	(319.6)	(460.6)	(432.3)	(155.2)
Natural Gas Related Derivatives | Discounted Cash Flow | Maximum | Natural Gas Basis Price
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Input price (usd per dekatherm/megawatt hour)	4.920	6.154
Natural Gas Related Derivatives | Discounted Cash Flow | Minimum | Natural Gas Basis Price
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Input price (usd per dekatherm/megawatt hour)	(1.629)	(2.101)
Natural Gas Related Derivatives | Option Model | Maximum | Natural Gas Basis Price
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Input price (usd per dekatherm/megawatt hour)	(0.090)	6.154
Natural Gas Related Derivatives | Option Model | Maximum | Annualized Volatility Price
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Option Volatility Percentage	40.20%	589.60%
Natural Gas Related Derivatives | Option Model | Minimum | Natural Gas Basis Price
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Input price (usd per dekatherm/megawatt hour)	(0.153)	(1.675)
Natural Gas Related Derivatives | Option Model | Minimum | Annualized Volatility Price
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Option Volatility Percentage	30.50%	30.90%
Electricity Related Derivatives
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Net Fair Value | $	$ (8.8)	$ (5.0)	(10.5)	(1.7)	(2.2)	2.4
Electricity Related Derivatives | Discounted Cash Flow | Maximum | Electricity Congestion Price
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Input price (usd per dekatherm/megawatt hour) | $ / MwH	83.900	90.95
Electricity Related Derivatives | Discounted Cash Flow | Minimum | Electricity Congestion Price
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Input price (usd per dekatherm/megawatt hour) | $ / MwH	(3.965)	(2.85)
Washington Gas Light Company | Discounted Cash Flow | Maximum | Natural Gas Basis Price
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Input price (usd per dekatherm/megawatt hour)	4.920	6.154
Washington Gas Light Company | Discounted Cash Flow | Minimum | Natural Gas Basis Price
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Input price (usd per dekatherm/megawatt hour)	(1.629)	(2.101)
Washington Gas Light Company | Natural Gas Related Derivatives
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Net Fair Value | $	$ (307.2)	$ (270.6)	$ (299.8)	$ (396.9)	$ (382.6)	$ (133.6)

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Operating Segment (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Segment Reporting [Abstract]
Total consolidated EBIT	$ (13,976)	$ (8,975)	$ 249,711	$ 130,064
Interest expense	13,140	9,503	38,704	28,020
INCOME (LOSS) BEFORE INCOME TAXES	(27,116)	(18,478)	211,007	102,044
Income tax expense (benefit)	(11,756)	(6,868)	80,364	33,152
NET INCOME (LOSS)	(15,360)	(11,610)	130,643	68,892
Dividends on Washington Gas Light Company preferred stock	330	330	990	990
NET INCOME (LOSS) APPLICABLE TO COMMON STOCK	$ (15,690)	$ (11,940)	$ 129,653	$ 67,902

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Derivative and Weather Related Instruments (Aggregate Fair Value) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014
Potential Collateral Requirements for Derivative Liabilities with Credit-risk-Contingent Features
Derivative liabilities with credit-risk-contingent features	$ 54.4	$ 28.8
Maximum potential collateral requirements	46.6	16.5
Washington Gas Light Company
Potential Collateral Requirements for Derivative Liabilities with Credit-risk-Contingent Features
Derivative liabilities with credit-risk-contingent features	20.1	20.6
Maximum potential collateral requirements	$ 20.0	$ 16.1

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Commitments and Contingencies (Tables)

9 Months Ended

Jun. 30, 2015

Commitments and Contingencies Disclosure [Abstract]

Minimum Commitments and Contractual Obligations

The following table summarizes the minimum commitments and contractual obligations of WGL Energy Services and WGL Midstream for the next five fiscal years and thereafter.

Contract Minimums
	WGL Energy Services						WGL Midstream
(In millions)	Gas Purchase Commitments(a)		Pipeline Contracts(b)		Electric Purchase Commitments(c)		Gas Purchase Commitments(d)		Pipeline Contracts(b)		Total
Remainder of 2015	$	37.1	$	1.5	$	153.3	$	20.9	$	5.9	$	218.7
2016	146.3		2.2		418.1		258.9		20.4		845.9
2017	57.3		2.0		171.3		389.5		18.2		638.3
2018	6.7		1.5		36.5		1,217.4		15.4		1,277.5
2019	—		0.8		2.0		1,747.8		60.7		1,811.3
Thereafter	—		1.7		0.5		35,647.5		1,093.2		36,742.9
Total	$	247.4	$	9.7	$	781.7	$	39,282.0	$	1,213.8	$	41,534.6

^(a)  Represents fixed price commitments with city gate equivalent deliveries.

^(b)  Represents minimum payments for natural gas transportation and storage contracts that have expiration dates through fiscal year 2044.

^(c)  Represents electric purchase commitments that are based on existing fixed price and fixed volume contracts. Includes $18.2 million of commitments related to renewable energy credits.

^(d)  Includes known and reasonably likely commitments to purchase natural gas. Cost estimates are based on forward market prices as of June 30, 2015.

The following table summarizes the minimum contractual payments that Washington Gas will make under its pipeline transportation, storage and peaking contracts, as well as minimum contractual payments to purchase natural gas for the next five fiscal years and thereafter.

Washington Gas Contract Minimums
(In millions)	Pipeline Contracts(a)		Gas Purchase Commitments(b)
Remainder of 2015	$	55.4	$	42.4
2016	218.7		359.6
2017	210.5		465.4
2018	211.3		460.9
2019	202.7		453.2
Thereafter	1,172.5		5,577.2
Total	$	2,071.1	$	7,358.7

^(a)  Represents minimum payments for natural gas transportation, storage and peaking contracts that have expiration dates through fiscal year 2031.

^(b)  Includes known and reasonably likely commitments to purchase natural gas. Cost estimates are based on market prices at June 30, 2015.

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Other Investments Financing Leases Table (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Minimum Payments Receivable for Direct Financing Leases
Total	$ 25,826	$ 18,159
WGSW
Minimum Payments Receivable for Direct Financing Leases
Remainder of 2015	2,400
2016	2,500
2017	2,400
2018	2,300
2019	2,200
Thereafter	22,600
Total	$ 34,400

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Long-Term Debt (Table)

9 Months Ended

Jun. 30, 2015

Long-term Debt, by Current and Noncurrent [Abstract]

Senior Notes, MTN And Private Placement Notes Outstanding

The following tables show the outstanding notes as of June 30, 2015 and September 30, 2014.

Senior Notes, MTNs and Private Placement Notes Outstanding
($ In millions)	WGL(a)			Washington Gas			Total Consolidated
June 30, 2015
Long-term notes(b)	$	250.0		$	741.0		$	991.0
Weighted average interest rate	3.66		%	5.56		%	5.08		%
September 30, 2014
Long-term notes(b)	$	—		$	691.0		$	691.0
Weighted average interest rate	n/a			5.65		%	5.65		%

^(a)  WGL includes WGL Holdings and all subsidiaries other than Washington Gas.

^(b)  Includes Senior Notes for WGL and both MTNs and private placement notes for Washington Gas. Represents face value including current maturities.

Senior Notes, MTN and Private Placement Issuances and Retirements

The following tables show senior notes, MTN and private placement issuances and retirements for the nine months ended June 30, 2015 and 2014.

Senior Notes, MTNs and Private Placement Issuances and Retirements
($ In millions)	Principal(b)		Interest Rate		Effective Cost(c)		Nominal Maturity Date
Nine Months Ended June 30, 2015
WGL(a)
Issuances:
10/24/2014	$	100.0	2.25	%	2.42	%	11/1/2019
10/24/2014	125.0		4.60	%	5.11	%	11/1/2044
12/16/2014	25.0		4.60	%	5.53	%	11/1/2044
Total	$	250.0
Washington Gas
Issuances:
12/15/2014	$	50.0	4.24	%	4.41	%	12/15/2044
Total	$	50.0
Total consolidated issuances	$	300.0
Nine Months Ended June 30, 2014
Washington Gas
Issuances:
12/5/2013	$	75.0	5.00	%	4.95	%	12/15/2043
Total	$	75.0
Retirements:
11/7/2013	$	37.0	4.88	%	n/a		11/7/2013
Total	$	37.0

^(a)  WGL includes WGL Holdings and all subsidiaries other than Washington Gas.

^(b)  Represents face amount.

^(c)  The estimated effective cost of the issued notes, including consideration of issuance fees and hedge costs.

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Fair Value Measurements (Realized and Unrealized Gains and Losses with Level 3 Measurements) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements	$ (38.4)	$ (21.9)	$ (66.3)	$ (151.1)
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to regulatory assets - gas costs	(9.2)	(17.6)	(38.1)	(190.7)
Total	(34.6)	(38.7)	(90.3)	(336.4)
Natural Gas Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements	(33.6)	(19.0)	(51.0)	(151.6)
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to regulatory assets - gas costs	(9.2)	(17.6)	(38.1)	(190.7)
Total	(37.9)	(37.6)	(80.5)	(332.4)
Electricity Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements	(4.8)	(2.3)	(15.3)	1.0
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to regulatory assets - gas costs	0.0	0.0	0.0	0.0
Total	3.3	(0.5)	(9.8)	(3.5)
Warrant
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements	0.0	(0.6)	0.0	(0.5)
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to regulatory assets - gas costs	0.0	0.0	0.0	0.0
Total	0.0	(0.6)	0.0	(0.5)
Operating revenues—non-utility
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements	(25.3)	(19.9)	0.3	(70.7)
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to income	(20.5)	(19.7)	4.1	(83.9)
Operating revenues—non-utility | Natural Gas Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements	(22.3)	(14.3)	(20.7)	(40.6)
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to income	(21.3)	(13.9)	(17.6)	(44.6)
Operating revenues—non-utility | Electricity Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements	(3.0)	(5.6)	21.0	(30.1)
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to income	0.8	(5.8)	21.7	(39.3)
Operating revenues—non-utility | Warrant
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements	0.0	0.0	0.0	0.0
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to income	0.0	0.0	0.0	0.0
Utility cost of gas
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements	(7.6)	(4.5)	(30.3)	(109.7)
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to income	(1.8)	(6.0)	(23.1)	(100.4)
Utility cost of gas | Natural Gas Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements	(7.6)	(4.5)	(30.3)	(109.7)
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to income	(1.8)	(6.0)	(23.1)	(100.4)
Utility cost of gas | Electricity Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements	0.0	0.0	0.0	0.0
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to income	0.0	0.0	0.0	0.0
Utility cost of gas | Warrant
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements	0.0	0.0	0.0	0.0
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to income	0.0	0.0	0.0	0.0
Other income-net
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements		(0.6)		(0.5)
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to income		(0.6)		(0.5)
Other income-net | Natural Gas Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements		0.0		0.0
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to income		0.0		0.0
Other income-net | Electricity Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements		0.0		0.0
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to income		0.0		0.0
Other income-net | Warrant
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements		(0.6)		(0.5)
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to income		(0.6)		(0.5)
Non-utility cost of energy-related sales
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements	(5.5)	3.1	(36.3)	29.8
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to income	(3.1)	5.2	(33.2)	39.1
Non-utility cost of energy-related sales | Natural Gas Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements	(3.7)	(0.2)	0.0	(1.3)
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to income	(5.6)	(0.1)	(1.7)	3.3
Non-utility cost of energy-related sales | Electricity Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements	(1.8)	3.3	(36.3)	31.1
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to income	2.5	5.3	(31.5)	35.8
Non-utility cost of energy-related sales | Warrant
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements	0.0	0.0	0.0	0.0
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to income	0.0	0.0	0.0	0.0
Washington Gas Light Company | Natural Gas Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements	(7.6)	(4.5)	(30.3)	(109.7)
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to regulatory assets - gas costs	(9.2)	(17.6)	(38.1)	(190.7)
Total	(11.0)	(23.6)	(61.2)	(291.1)
Washington Gas Light Company | Utility cost of gas | Natural Gas Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized and unrealized gains (losses) recorded to income for Level 3 measurements	(7.6)	(4.5)	(30.3)	(109.7)
Unrealized Gains (Losses) Recorded for Level 3 Measurements
Recorded to income	$ (1.8)	$ (6.0)	$ (23.1)	$ (100.4)

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Income Taxes-Balance Sheet (Details) - USD ($)	3 Months Ended
	Dec. 31, 2013	Jun. 30, 2015	Sep. 30, 2014
Income Tax Expense Benefit Details [Line Items]
Unrecognized tax benefits		$ 31,100,000	$ 32,600,000
Washington Gas Light Company
Income Tax Expense Benefit Details [Line Items]
Accrued interest related to uncertain tax positions		$ 0	$ 100,000
Regulatory asset, amortization period	five year

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Accounts Payable and Other Accrued Liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Accounts Payable and Other Accrued Liabilities [Line Items]
Accounts payable - trade	$ 234,600	$ 278,800
Employee benefits and payroll accruals	25,800	19,800
Other accrued liabilities	15,200	14,600
Accounts Payable and Accrued Liabilities, Current, Total	275,615	313,221
Washington Gas Light Company
Accounts Payable and Other Accrued Liabilities [Line Items]
Accounts payable - trade	96,400	146,400
Employee benefits and payroll accruals	24,100	18,200
Other accrued liabilities	8,500	11,900
Accounts Payable and Accrued Liabilities, Current, Total	$ 128,968	$ 176,467

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Fair Value Measurements (Narrative) (Details) $ in Millions	9 Months Ended
	Jun. 30, 2015 USD ($)
Fair Value Disclosures [Abstract]
Impairment loss	$ 5.6

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Commitments and Contingencies (Narrative) (Details) $ in Millions			9 Months Ended
	May. 12, 2015	May. 06, 2015 USD ($) well	Jun. 30, 2015 USD ($)	Mar. 10, 2015 MMBTU	Nov. 30, 2014 MMBTU
Commitments And Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation			$ 41,534.6
Virginia Gas Reserves
Commitments And Contingencies [Line Items]
Term of agreement		20 years
Number of wells | well		25
Cost of acquired non-operating working interest		$ 126.0
Decision period	180 days
WGL Midstream | GAIL Global (USA) LNG, LLC
Commitments And Contingencies [Line Items]
Gas sale and purchase and capacity agreement terms			20 years
WGL Midstream | Mountain Valley Gas Purchase Commitment
Commitments And Contingencies [Line Items]
Transportation and delivery capacity in dekatherms per day | MMBTU				500,000
Gas sale and purchase and capacity agreement terms			20 years
WGL Midstream | Minimum | GAIL Global (USA) LNG, LLC
Commitments And Contingencies [Line Items]
Transportation and delivery capacity in dekatherms per day | MMBTU					340,000
WGL Midstream | Maximum | GAIL Global (USA) LNG, LLC
Commitments And Contingencies [Line Items]
Transportation and delivery capacity in dekatherms per day | MMBTU					430,000
WGL | WGL Energy Services | Guarantee on behalf of subsidiary
Commitments And Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation			$ 224.8
WGL | WGL Midstream | Guarantee on behalf of subsidiary
Commitments And Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation			311.8
WGL | Other Subsidiaries | Guarantee on behalf of subsidiary
Commitments And Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation			9.1
WGL | External Partners | Performance guarantee
Commitments And Contingencies [Line Items]
Unrecorded Unconditional Purchase Obligation			$ 8.1

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Fair Value Measurements (Fair Value Hierarchy) (Details) - USD ($) $ in Millions	Jun. 30, 2015	Sep. 30, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets	$ 68.9	$ 72.6
Liabilities	(448.5)	(390.9)
Natural Gas Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets	44.8	56.4
Liabilities	(414.4)	(368.2)
Electricity Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets	24.1	16.2
Liabilities	(34.1)	(21.0)
Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Liabilities		(1.7)
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets	0.0	0.0
Liabilities	0.0	0.0
Level 1 | Natural Gas Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets	0.0	0.0
Liabilities	0.0	0.0
Level 1 | Electricity Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets	0.0	0.0
Liabilities	0.0	0.0
Level 1 | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Liabilities		0.0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets	24.5	23.0
Liabilities	(44.3)	(41.6)
Level 2 | Natural Gas Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets	22.4	22.7
Liabilities	(41.0)	(39.8)
Level 2 | Electricity Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets	2.1	0.3
Liabilities	(3.3)	(0.1)
Level 2 | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Liabilities		(1.7)
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets	44.4	49.6
Liabilities	(404.2)	(349.3)
Level 3 | Natural Gas Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets	22.4	33.7
Liabilities	(373.4)	(328.4)
Level 3 | Electricity Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets	22.0	15.9
Liabilities	(30.8)	(20.9)
Level 3 | Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Liabilities		0.0
Washington Gas Light Company
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets	26.7	26.2
Liabilities	(338.4)	(308.4)
Washington Gas Light Company | Natural Gas Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets	26.7	26.2
Liabilities	(338.4)	(308.4)
Washington Gas Light Company | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets	0.0	0.0
Liabilities	0.0	0.0
Washington Gas Light Company | Level 1 | Natural Gas Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets	0.0	0.0
Liabilities	0.0	0.0
Washington Gas Light Company | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets	14.8	13.5
Liabilities	(19.3)	(25.1)
Washington Gas Light Company | Level 2 | Natural Gas Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets	14.8	13.5
Liabilities	(19.3)	(25.1)
Washington Gas Light Company | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets	11.9	12.7
Liabilities	(319.1)	(283.3)
Washington Gas Light Company | Level 3 | Natural Gas Related Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Assets	11.9	12.7
Liabilities	$ (319.1)	$ (283.3)

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Long-Term Debt

9 Months Ended

Jun. 30, 2015

Long-term Debt, by Current and Noncurrent [Abstract]

Long-Term Debt

NOTE 4. LONG-TERM DEBT

UNSECURED NOTES

WGL and Washington Gas issue long-term notes with individual terms regarding interest rates, maturities and call or put options. These notes can have maturity dates of one or more years from the date of issuance.

At June 30, 2015 and September 30, 2014, WGL had the capacity under a shelf registration to issue an unspecified amount of long-term senior notes debt securities. At September 30, 2014 Washington Gas had the capacity to issue up to $275.0 million of additional long-term Medium-Term Notes (MTNs) under a shelf registration that expired on May 31, 2015. Washington Gas intends to file a shelf registration in the fourth quarter of fiscal year 2015 to issue additional MTNs.

The following tables show the outstanding notes as of June 30, 2015 and September 30, 2014.

Senior Notes, MTNs and Private Placement Notes Outstanding
($ In millions)	WGL(a)			Washington Gas			Total Consolidated
June 30, 2015
Long-term notes(b)	$	250.0		$	741.0		$	991.0
Weighted average interest rate	3.66		%	5.56		%	5.08		%
September 30, 2014
Long-term notes(b)	$	—		$	691.0		$	691.0
Weighted average interest rate	n/a			5.65		%	5.65		%

^(a)  WGL includes WGL Holdings and all subsidiaries other than Washington Gas.

^(b)  Includes Senior Notes for WGL and both MTNs and private placement notes for Washington Gas. Represents face value including current maturities.

The following tables show senior notes, MTN and private placement issuances and retirements for the nine months ended June 30, 2015 and 2014.

Senior Notes, MTNs and Private Placement Issuances and Retirements
($ In millions)	Principal(b)		Interest Rate		Effective Cost(c)		Nominal Maturity Date
Nine Months Ended June 30, 2015
WGL(a)
Issuances:
10/24/2014	$	100.0	2.25	%	2.42	%	11/1/2019
10/24/2014	125.0		4.60	%	5.11	%	11/1/2044
12/16/2014	25.0		4.60	%	5.53	%	11/1/2044
Total	$	250.0
Washington Gas
Issuances:
12/15/2014	$	50.0	4.24	%	4.41	%	12/15/2044
Total	$	50.0
Total consolidated issuances	$	300.0
Nine Months Ended June 30, 2014
Washington Gas
Issuances:
12/5/2013	$	75.0	5.00	%	4.95	%	12/15/2043
Total	$	75.0
Retirements:
11/7/2013	$	37.0	4.88	%	n/a		11/7/2013
Total	$	37.0

^(a)  WGL includes WGL Holdings and all subsidiaries other than Washington Gas.

^(b)  Represents face amount.

^(c)  The estimated effective cost of the issued notes, including consideration of issuance fees and hedge costs.

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Commitments and Contingencies (Commitments) (Details) $ in Millions		Jun. 30, 2015 USD ($)
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Remainder of 2015		$ 218.7
2016		845.9
2017		638.3
2018		1,277.5
2019		1,811.3
Thereafter		36,742.9
Total		41,534.6
Washington Gas Light Company | Gas Purchase Commitments
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Remainder of 2015	[1]	42.4
2016	[1]	359.6
2017	[1]	465.4
2018	[1]	460.9
2019	[1]	453.2
Thereafter	[1]	5,577.2
Total	[1]	7,358.7
Washington Gas Light Company | Pipeline Contracts
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Remainder of 2015	[2]	55.4
2016	[2]	218.7
2017	[2]	210.5
2018	[2]	211.3
2019	[2]	202.7
Thereafter	[2]	1,172.5
Total	[2]	2,071.1
WGL Energy Services | Gas Purchase Commitments
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Remainder of 2015	[3]	37.1
2016	[3]	146.3
2017	[3]	57.3
2018	[3]	6.7
2019	[3]	0.0
Thereafter	[3]	0.0
Total	[3]	247.4
WGL Energy Services | Pipeline Contracts
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Remainder of 2015	[4]	1.5
2016	[4]	2.2
2017	[4]	2.0
2018	[4]	1.5
2019	[4]	0.8
Thereafter	[4]	1.7
Total	[4]	9.7
WGL Energy Services | Electric Purchase Commitments
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Remainder of 2015	[5]	153.3
2016	[5]	418.1
2017	[5]	171.3
2018	[5]	36.5
2019	[5]	2.0
Thereafter	[5]	0.5
Total	[5]	781.7
Commitments related to renewable energy credits		18.2
WGL Midstream | Gas Purchase Commitments
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Remainder of 2015	[6]	20.9
2016	[6]	258.9
2017	[6]	389.5
2018	[6]	1,217.4
2019	[6]	1,747.8
Thereafter	[6]	35,647.5
Total	[6]	39,282.0
WGL Midstream | Pipeline Contracts
Unrecorded Unconditional Purchase Obligation, Fiscal Year Maturity [Abstract]
Remainder of 2015	[4]	5.9
2016	[4]	20.4
2017	[4]	18.2
2018	[4]	15.4
2019	[4]	60.7
Thereafter	[4]	1,093.2
Total	[4]	$ 1,213.8

[1] Includes known and reasonably likely commitments to purchase natural gas. Cost estimates are based on market prices at June 30, 2015.

[2] Represents minimum payments for natural gas transportation, storage and peaking contracts that have expiration dates through fiscal year 2031.

[3] Represents fixed price commitments with city gate equivalent deliveries.

[4] Represents minimum payments for natural gas transportation and storage contracts that have expiration dates through fiscal year 2044.

[5] Represents electric purchase commitments that are based on existing fixed price and fixed volume contracts. Includes $18.2 million of commitments related to renewable energy credits.

[6] Includes known and reasonably likely commitments to purchase natural gas. Cost estimates are based on forward market prices as of June 30, 2015.

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Derivative and Weather Related Instruments Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015 USD ($) Counterparties	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Counterparties	Jun. 30, 2014 USD ($)	Sep. 30, 2014 USD ($)
Washington Gas Light Company
Asset Optimization [Abstract]
Gain (loss) on asset optimization transactions, net pretax	$ (2.9)	$ 1.9	$ 14.2	$ (78.3)
Unrealized gain (loss) on asset optimization derivative instruments, net pretax	(10.4)	(1.2)	(13.3)	(105.3)
Derivative, Collateral [Abstract]
Right to reclaim cash	6.5		6.5		$ 8.2
Obligation to return cash	$ 4.1		$ 4.1		2.5
Concentration of Credit Risk
Number of counterparties | Counterparties	2		2
Percentage of credit exposure	10.00%		10.00%
Obligation to counterparties	$ 23.4		$ 23.4
WGL Energy Services
Derivative, Collateral [Abstract]
Right to reclaim cash	8.9		8.9		5.7
Obligation to return cash	0.1		0.1
Collateral already posted, aggregate fair value	$ 5.7		$ 5.7		5.3
Concentration of Credit Risk
Number of counterparties | Counterparties	2		2
Percentage of credit exposure	10.00%		10.00%
Obligation to counterparties	$ 0.2		$ 0.2
Gain (losses) on weather related instruments, pretax	(0.5)	$ (0.9)	2.7	$ 4.5
WGL Midstream
Derivative, Collateral [Abstract]
Right to reclaim cash	9.9		9.9		$ 11.4
Obligation to return cash	$ 0.1		$ 0.1
Concentration of Credit Risk
Number of counterparties | Counterparties	2		2
Percentage of credit exposure	10.00%		10.00%
Obligation to counterparties	$ 15.0		$ 15.0

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Fair Value Measurements (Tables)

9 Months Ended

Jun. 30, 2015

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Fair Value Measurements Under the Fair Value Hierarchy

The following tables set forth financial instruments recorded at fair value as of June 30, 2015 and September 30, 2014, respectively. A financial instrument’s classification within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement requires judgment, and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy.

WGL Holdings, Inc. Fair Value Measurements Under the Fair Value Hierarchy
(In millions)	Level 1		Level 2			Level 3			Total
At June 30, 2015
Assets
Natural gas related derivatives	$	—	$	22.4		$	22.4		$	44.8
Electricity related derivatives	—		2.1			22.0			24.1
Total Assets	$	—	$	24.5		$	44.4		$	68.9
Liabilities
Natural gas related derivatives	$	—	$	(41.0	)	$	(373.4	)	$	(414.4	)
Electricity related derivatives	—		(3.3		)	(30.8		)	(34.1		)
Total Liabilities	$	—	$	(44.3	)	$	(404.2	)	$	(448.5	)
At September 30, 2014
Assets
Natural gas related derivatives	$	—	$	22.7		$	33.7		$	56.4
Electricity related derivatives	—		0.3			15.9			16.2
Total Assets	$	—	$	23.0		$	49.6		$	72.6
Liabilities
Natural gas related derivatives	$	—	$	(39.8	)	$	(328.4	)	$	(368.2	)
Electricity related derivatives	—		(0.1		)	(20.9		)	(21.0		)
Interest rate derivatives	—		(1.7		)	—			(1.7		)
Total Liabilities	$	—	$	(41.6	)	$	(349.3	)	$	(390.9	)

Quantitative Information about Level 3 Fair Value Measurements

The following table includes quantitative information about the significant unobservable inputs used in the fair value measurement of our Level 3 financial instruments and the respective fair values of the net derivative asset and liability positions, by contract type, as of June 30, 2015 and September 30, 2014.

Quantitative Information about Level 3 Fair Value Measurements
(In millions)	Net Fair Value June 30, 2015	Valuation Techniques	Unobservable Inputs	Range
WGL Holdings, Inc.
Natural gas related derivatives	$(351.0)	Discounted Cash Flow	Natural Gas Basis Price (per dekatherm)	($1.629) - $4.920
		Option Model	Natural Gas Basis Price (per dekatherm)	($0.153) - ($0.090)
			Annualized Volatility of Spot Market Natural Gas	30.5% to 40.2%
Electricity related derivatives	$(8.8)	Discounted Cash Flow	Electricity Congestion Price (per megawatt hour)	($3.965) - $83.900
Washington Gas Light Company
Natural gas related derivatives	$(307.2)	Discounted Cash Flow	Natural Gas Basis Price (per dekatherm)	($1.629) - $4.920
	Net Fair Value September 30, 2014
WGL Holdings, Inc.
Natural gas related derivatives	$(294.7)	Discounted Cash Flow	Natural Gas Basis Price (per dekatherm)	($2.101) - $6.154
		Option Model	Natural Gas Basis Price (per dekatherm)	($1.675) - $6.154
			Annualized Volatility of Spot Market Natural Gas	30.9% - 589.6%
Electricity related derivatives	$(5.0)	Discounted Cash Flow	Electricity Congestion Price (per megawatt hour)	($2.85) - $90.95
Washington Gas Light Company
Natural gas related derivatives	$(270.6)	Discounted Cash Flow	Natural Gas Basis Price (per dekatherm)	($2.101) - $6.154

Reconciliation of Fair Value Measurements Using Significant Level 3 Inputs

The following tables are a summary of the changes in the fair value of our derivative instruments that are measured at net fair value on a recurring basis in accordance with ASC Topic 820 using significant Level 3 inputs during the three and nine months ended June 30, 2015 and 2014, respectively.

WGL Holdings, Inc. Reconciliation of Fair Value Measurements Using Significant Level 3 Inputs
(In millions)	Natural Gas Related Derivatives			Electricity Related Derivatives			Warrants			Total
Three Months Ended June 30, 2015
Balance at April 1, 2015	$	(319.6	)	$	(10.5	)	$	—		$	(330.1	)
Realized and unrealized gains (losses)
Recorded to income	(33.6		)	(4.8		)	—			(38.4		)
Recorded to regulatory assets—gas costs	(7.7		)	—			—			(7.7		)
Transfers out of Level 3	3.9			—			—			3.9
Purchases	—			3.9			—			3.9
Settlements	6.0			2.6			—			8.6
Balance at June 30, 2015	$	(351.0	)	$	(8.8	)	$	—		$	(359.8	)
Three Months Ended June 30, 2014
Balance at April 1, 2014	$	(432.3	)	$	(2.2	)	$	1.2		$	(433.3	)
Realized and unrealized gains (losses)
Recorded to income	(19.0		)	(2.3		)	(0.6		)	(21.9		)
Recorded to regulatory assets—gas costs	(15.9		)	—			—			(15.9		)
Transfers out of Level 3	1.7			—			—			1.7
Purchases	—			2.3			—			2.3
Settlements	4.9			0.5			—			5.4
Balance at June 30, 2014	$	(460.6	)	$	(1.7	)	$	0.6		$	(461.7	)
Nine Months Ended June 30, 2015
Balance at October 1, 2014	$	(294.7	)	$	(5.0	)	$	—		$	(299.7	)
Realized and unrealized gains (losses)
Recorded to income	(51.0		)	(15.3		)	—			(66.3		)
Recorded to regulatory assets—gas costs	(48.0		)	—			—			(48.0		)
Transfers into Level 3	5.4			—			—			5.4
Transfers out of Level 3	3.6			—			—			3.6
Purchases	—			7.3			—			7.3
Settlements	33.7			4.2			—			37.9
Balance at June 30, 2015	$	(351.0	)	$	(8.8	)	$	—		$	(359.8	)
Nine Months Ended June 30, 2014
Balance at October 1, 2013	$	(155.2	)	$	2.4		$	1.1		$	(151.7	)
Realized and unrealized gains (losses)
Recorded to income	(151.6		)	1.0			(0.5		)	(151.1		)
Recorded to regulatory assets—gas costs	(198.7		)	—			—			(198.7		)
Transfers out of Level 3	1.7			—			—			1.7
Purchases	—			3.7			—			3.7
Settlements	43.2			(8.8		)	—			34.4
Balance at June 30, 2014	$	(460.6	)	$	(1.7	)	$	0.6		$	(461.7	)

Realized and Unrealized Gains (Losses) Recorded to Income for Level 3 Measurements

The table below sets forth the line items on the statements of income to which amounts are recorded for the three and nine months ended June 30, 2015 and 2014, respectively, related to fair value measurements using significant Level 3 inputs.

WGL Holdings, Inc. Realized and Unrealized Gains (Losses) Recorded to Income for Level 3 Measurements
(In millions)	Natural Gas Related Derivatives			Electricity Related Derivatives			Warrants			Total
Three Months Ended June 30, 2015
Operating revenues—non-utility	$	(22.3	)	$	(3.0	)	$	—		$	(25.3	)
Utility cost of gas	(7.6		)	—			—			(7.6		)
Non-utility cost of energy-related sales	(3.7		)	(1.8		)	—			(5.5		)
Total	$	(33.6	)	$	(4.8	)	$	—		$	(38.4	)
Three Months Ended June 30, 2014
Operating revenues—non-utility	$	(14.3	)	$	(5.6	)	$	—		$	(19.9	)
Utility cost of gas	(4.5		)	—			—			(4.5		)
Other income-net	—			—			(0.6		)	(0.6		)
Non-utility cost of energy-related sales	(0.2		)	3.3			—			3.1
Total	$	(19.0	)	$	(2.3	)	$	(0.6	)	$	(21.9	)
Nine Months Ended June 30, 2015
Operating revenues—non-utility	$	(20.7	)	$	21.0		$	—		$	0.3
Utility cost of gas	(30.3		)	—			—			(30.3		)
Non-utility cost of energy-related sales	—			(36.3		)	—			(36.3		)
Total	$	(51.0	)	$	(15.3	)	$	—		$	(66.3	)
Nine Months Ended June 30, 2014
Operating revenues—non-utility	$	(40.6	)	$	(30.1	)	$	—		$	(70.7	)
Utility cost of gas	(109.7		)	—			—			(109.7		)
Other income-net	—			—			(0.5		)	(0.5		)
Non-utility cost of energy-related sales	(1.3		)	31.1			—			29.8
Total	$	(151.6	)	$	1.0		$	(0.5	)	$	(151.1	)

Unrealized Gains (Losses) Recorded for Level 3 Measurements

Unrealized gains (losses) attributable to derivative assets and liabilities measured using significant Level 3 inputs were recorded as follows, for the three and nine months ended June 30, 2015 and 2014, respectively.

WGL Holdings, Inc. Unrealized Gains (Losses) Recorded for Level 3 Measurements
(In millions)	Natural Gas Related Derivatives			Electricity Related Derivatives			Warrants			Total
Three Months Ended June 30, 2015
Recorded to income
Operating revenues—non-utility	$	(21.3	)	$	0.8		$	—		$	(20.5	)
Utility cost of gas	(1.8		)	—			—			(1.8		)
Non-utility cost of energy-related sales	(5.6		)	2.5			—			(3.1		)
Recorded to regulatory assets—gas costs	(9.2		)	—			—			(9.2		)
Total	$	(37.9	)	$	3.3		$	—		$	(34.6	)
Three Months Ended June 30, 2014
Recorded to income
Operating revenues—non-utility	$	(13.9	)	$	(5.8	)	$	—		$	(19.7	)
Utility cost of gas	(6.0		)	—			—			(6.0		)
Non-utility cost of energy-related sales	(0.1		)	5.3			—			5.2
Other income-net	—			—			(0.6		)	(0.6		)
Recorded to regulatory assets—gas costs	(17.6		)	—			—			(17.6		)
Total	$	(37.6	)	$	(0.5	)	$	(0.6	)	$	(38.7	)
Nine Months Ended June 30, 2015
Recorded to income
Operating revenues—non-utility	$	(17.6	)	$	21.7		$	—		$	4.1
Utility cost of gas	(23.1		)	—			—			(23.1		)
Non-utility cost of energy-related sales	(1.7		)	(31.5		)	—			(33.2		)
Recorded to regulatory assets—gas costs	(38.1		)	—			—			(38.1		)
Total	$	(80.5	)	$	(9.8	)	$	—		$	(90.3	)
Nine Months Ended June 30, 2014
Recorded to income
Operating revenues—non-utility	$	(44.6	)	$	(39.3	)	$	—		$	(83.9	)
Utility cost of gas	(100.4		)	—			—			(100.4		)
Non-utility cost of energy-related sales	3.3			35.8			—			39.1
Other income-net	—			—			(0.5		)	(0.5		)
Recorded to regulatory assets—gas costs	(190.7		)	—			—			(190.7		)
Total	$	(332.4	)	$	(3.5	)	$	(0.5	)	$	(336.4	)

Fair Value of Financial Instruments

The following table presents the carrying amounts and estimated fair values of our financial instruments at June 30, 2015 and September 30, 2014.

WGL Holdings, Inc. Fair Value of Financial Instruments
	June 30, 2015				September 30, 2014
(In millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Money market funds(a)	$	74.6	$	74.6	$	9.7	$	9.7
Other short-term investments(a)	$	1.0	$	1.0	$	—	$	—
Commercial paper (b)	$	156.0	$	156.0	$	453.5	$	453.5
Long-term debt(c)	$	950.5	$	1,033.5	$	679.2	$	809.3

Washington Gas Light Company

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Fair Value Measurements Under the Fair Value Hierarchy

Washington Gas Light Company Fair Value Measurements Under the Fair Value Hierarchy
(In millions)	Level 1		Level 2			Level 3			Total
At June 30, 2015
Assets
Natural gas related derivatives	$	—	$	14.8		$	11.9		$	26.7
Total Assets	$	—	$	14.8		$	11.9		$	26.7
Liabilities
Natural gas related derivatives	$	—	$	(19.3	)	$	(319.1	)	$	(338.4	)
Total Liabilities	$	—	$	(19.3	)	$	(319.1	)	$	(338.4	)
At September 30, 2014
Assets
Natural gas related derivatives	$	—	$	13.5		$	12.7		$	26.2
Total Assets	$	—	$	13.5		$	12.7		$	26.2
Liabilities
Natural gas related derivatives	$	—	$	(25.1	)	$	(283.3	)	$	(308.4	)
Total Liabilities	$	—	$	(25.1	)	$	(283.3	)	$	(308.4	)

Reconciliation of Fair Value Measurements Using Significant Level 3 Inputs

Washington Gas Light Company Reconciliation of Fair Value Measurements Using Significant Level 3 Inputs
(In millions)	Natural Gas Related Derivatives
Three Months Ended June 30, 2015
Balance at April 1, 2015	$	(299.8	)
Realized and unrealized gains (losses)
Recorded to income	(7.6		)
Recorded to regulatory assets—gas costs	(7.7		)
Transfers out of Level 3	2.8
Settlements	5.1
Balance at June 30, 2015	$	(307.2	)
Three Months Ended June 30, 2014
Balance at April 1, 2014	$	(382.6	)
Realized and unrealized gains (losses)
Recorded to income	(4.5		)
Recorded to regulatory assets—gas costs	(15.9		)
Transfers out of Level 3	1.7
Settlements	4.4
Balance at June 30, 2014	$	(396.9	)
Nine Months Ended June 30, 2015
Balance at October 1, 2014	$	(270.6	)
Realized and unrealized gains (losses)
Recorded to income	(30.3		)
Recorded to regulatory assets—gas costs	(48.0		)
Transfers into Level 3	5.4
Transfers out of Level 3	2.5
Settlements	33.8
Balance at June 30, 2015	$	(307.2	)
Nine Months Ended June 30, 2014
Balance at October 1, 2013	$	(133.6	)
Realized and unrealized gains (losses)
Recorded to income	(109.7		)
Recorded to regulatory assets—gas costs	(198.7		)
Transfers out of Level 3	1.7
Settlements	43.4
Balance at June 30, 2014	$	(396.9	)

Realized and Unrealized Gains (Losses) Recorded to Income for Level 3 Measurements

Washington Gas Light Company Realized and Unrealized Gains (Losses) Recorded to Income for Level 3 Measurements
(In millions)	Natural Gas Related Derivatives
Three Months Ended June 30, 2015
Utility cost of gas	$	(7.6	)
Total	$	(7.6	)
Three Months Ended June 30, 2014
Utility cost of gas	$	(4.5	)
Total	$	(4.5	)
Nine Months Ended June 30, 2015
Utility cost of gas	$	(30.3	)
Total	$	(30.3	)
Nine Months Ended June 30, 2014
Utility cost of gas	$	(109.7	)
Total	$	(109.7	)

Unrealized Gains (Losses) Recorded for Level 3 Measurements

Washington Gas Light Company Unrealized Gains (Losses) Recorded for Level 3 Measurements
(In millions)	Natural Gas Related Derivatives
Three Months Ended June 30, 2015
Recorded to income - utility cost of gas	$	(1.8	)
Recorded to regulatory assets—gas costs	(9.2		)
Total	$	(11.0	)
Three Months Ended June 30, 2014
Recorded to income - utility cost of gas	$	(6.0	)
Recorded to regulatory assets—gas costs	(17.6		)
Total	$	(23.6	)
Nine Months Ended June 30, 2015
Recorded to income - utility cost of gas	$	(23.1	)
Recorded to regulatory assets—gas costs	(38.1		)
Total	$	(61.2	)
Nine Months Ended June 30, 2014
Recorded to income - utility cost of gas	$	(100.4	)
Recorded to regulatory assets—gas costs	(190.7		)
Total	$	(291.1	)

Fair Value of Financial Instruments

Washington Gas Light Company Fair Value of Financial Instruments
	June 30, 2015				September 30, 2014
(In millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Money market funds(a)	$	70.4	$	70.4	$	4.3	$	4.3
Other short-term investments(a)	$	1.0	$	1.0	$	—	$	—
Commercial paper (b)	$	—	$	—	$	89.0	$	89.0
Long-term debt(c)	$	702.2	$	795.9	$	679.2	$	809.3

^(a)  Balance is located in cash and cash equivalents in the accompanying balance sheets. These amounts may be offset by outstanding checks.

^(b)  Balance is located in notes payable in the accompanying balance sheets.

^(c)  Less current maturities and unamortized discounts.

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Derivative and Weather Related Instruments (Tables)

9 Months Ended

Jun. 30, 2015

Derivative [Line Items]

Absolute Notional Amounts of Open Positions on Derivative Instruments

At June 30, 2015 and September 30, 2014, respectively, the absolute notional amounts of our derivatives were as follows:

Absolute Notional Amounts of Open Positions on Derivative Instruments
Derivative transactions	WGL Holdings, Inc.	Washington Gas
June 30, 2015	Notional Amounts
Natural Gas(In millions of therms)
Asset Optimization	21,296.2	13,722.3
Retail sales	0.8	—
Other risk-management activities	1,786.9	1,377.4
Electricity(In millions of kWhs)
Retail sales	4,474.0	—
Other risk-management activities	20,683.5	—
September 30, 2014
Natural Gas(In millions of therms)
Asset Optimization	20,593.3	13,740.9
Retail sales	44.7	—
Other risk-management activities	1,641.3	1,398.2
Electricity(In millions of kWhs)
Retail sales	3,831.4	—
Other risk-management activities	16,734.1	—
Warrants(In millions of shares)	4.6	—
Interest Rate Swaps(In millions of dollars)	150.0	—

Balance Sheet Classification of Derivative Instruments

The following tables present the balance sheet classification for all derivative instruments as of June 30, 2015 and September 30, 2014.

WGL Holdings, Inc. Balance Sheet Classification of Derivative Instruments
(In millions)	Derivative Instruments Not Designated as Hedging Instruments					Derivative Instruments Designated as Hedging Instruments
As of June 30, 2015	Gross Derivative Assets		Gross Derivative Liabilities			Gross Derivative Assets		Gross Derivative Liabilities			Netting of Collateral		Total(a)
Current Assets—Derivatives	$	14.5	$	(0.1	)	$	—	$	—		$	1.3	$	15.7
Deferred Charges and Other Assets—Derivatives	28.5		(0.2		)	—		—			—		28.3
Current Liabilities—Derivatives	23.9		(86.2		)	—		—			3.5		(58.8		)
Deferred Credits—Derivatives	2.0		(362.0		)	—		—			5.7		(354.3		)
Total	$	68.9	$	(448.5	)	$	—	$	—		$	10.5	$	(369.1	)
As of September 30, 2014
Current Assets—Derivatives	$	20.8	$	(2.5	)	$	—	$	—		$	—	$	18.3
Deferred Charges and Other Assets—Derivatives	18.7		—			—		—			—		18.7
Current Liabilities—Derivatives	15.4		(70.3		)	—		(1.7		)	8.0		(48.6		)
Deferred Credits—Derivatives	17.7		(316.4		)	—		—			4.0		(294.7		)
Total	$	72.6	$	(389.2	)	$	—	$	(1.7	)	$	12.0	$	(306.3	)

Gains and (Losses) on Derivative Instruments

The following table presents all gains and losses associated with derivative instruments for the three and nine months ended June 30, 2015 and 2014.

Gains and Losses on Derivative Instruments
(In millions)	WGL Holdings, Inc.						Washington Gas
Three Months Ended June 30,	2015			2014			2015			2014
Recorded to income
Operating revenues—non-utility	$	(28.3	)	$	(21.3	)	$	—		$	—
Utility cost of gas	(10.4		)	(2.0		)	(10.4		)	(2.0		)
Non-utility cost of energy-related sales	3.2			2.8			—			—
Other income-net	—			(0.6		)	—			—
Recorded to regulatory assets
Gas costs	(12.1		)	(12.5		)	(12.1		)	(12.5		)
Total	$	(47.6	)	$	(33.6	)	$	(22.5	)	$	(14.5	)
Nine Months Ended June 30,	2015			2014			2015			2014
Recorded to income
Operating revenues—non-utility	$	46.0		$	(105.6	)	$	—		$	—
Utility cost of gas	(20.4		)	(125.7		)	(20.4		)	(125.7		)
Non-utility cost of energy-related sales	(35.9		)	46.7			—			—
Other income-net	—			(0.5		)	—			—
Interest expense(a)	(0.5		)	—			—			—
Recorded to regulatory assets
Gas costs	(36.0		)	(224.5		)	(36.0		)	(224.5		)
Other	—			1.2			—			1.2
Recorded to other comprehensive income(b)	(8.0		)	—			—			—
Total	$	(54.8	)	$	(408.4	)	$	(56.4	)	$	(349.0	)

(a) Represents $(0.4) million of ineffectiveness for our cash flow hedge and $(0.1) million of amortization of amounts previously recorded to Accumulated Other Comprehensive Income.

(b) Represents the effective portion of our cash flow hedge of $(8.1) million less $(0.1) million of amortization that was reclassified to interest expense.

Potential Collateral Requirements for Derivative Liabilities with Credit-risk-Contingent Features

The following table shows the aggregate fair value of all derivative instruments with credit-related contingent features that are in a liability position, as well as the maximum amount of collateral that would be required if the most intrusive credit-risk-related contingent features underlying these agreements were triggered on June 30, 2015 and September 30, 2014, respectively.

Potential Collateral Requirements for Derivative Liabilities with Credit-Risk-Contingent Features
(In millions)	WGL Holdings, Inc.		Washington Gas
June 30, 2015
Derivative liabilities with credit-risk-contingent features	$	54.4	$	20.1
Maximum potential collateral requirements	46.6		20.0
September 30, 2014
Derivative liabilities with credit-risk-contingent features	$	28.8	$	20.6
Maximum potential collateral requirements	16.5		16.1

Washington Gas Light Company

Derivative [Line Items]

Balance Sheet Classification of Derivative Instruments

Washington Gas Light Company Balance Sheet Classification of Derivative Instruments(b)
(In millions)
As of June 30, 2015	Gross Derivative Assets		Gross Derivative Liabilities			Netting of Collateral		Total(a)
Current Assets—Derivatives	$	5.9	$	—		$	1.3	$	7.2
Deferred Charges and Other Assets—Derivatives	12.4		(0.1		)	—		12.3
Current Liabilities—Derivatives	7.8		(44.8		)	—		(37.0		)
Deferred Credits—Derivatives	0.6		(293.5		)	—		(292.9		)
Total	$	26.7	$	(338.4	)	$	1.3	$	(310.4	)
As of September 30, 2014
Current Assets—Derivatives	$	3.9	$	—		$	—	$	3.9
Deferred Charges and Other Assets—Derivatives	9.5		—			—		9.5
Current Liabilities—Derivatives	8.6		(43.2		)	0.7		(33.9		)
Deferred Credits—Derivatives	4.2		(265.2		)	0.2		(260.8		)
Total	$	26.2	$	(308.4	)	$	0.9	$	(281.3	)

(a) WGL has elected to offset the fair value of recognized derivative instruments against the right to reclaim or the obligation to return collateral for derivative instruments executed under the same master netting arrangement in accordance with ASC 815. All recognized derivative contracts and associated financial collateral subject to a master netting arrangement or similar that is eligible for offset under ASC 815 have been presented net in the balance sheet.

(b) Washington Gas did not have any derivative instruments outstanding that were designated as hedging instruments at June 30, 2015 or September 30, 2014.

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Other Investments Narrative (Details) $ in Thousands	9 Months Ended
	Jun. 30, 2015 USD ($) MMBTU agreement company investment mi	Mar. 31, 2015	Mar. 10, 2015 MMBTU	Sep. 30, 2014 USD ($)
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Number of investments qualifying as variable interest entities | investment	4
Gain on sale of investments	$ 700
Investments in unconsolidated affiliates	121,290			$ 100,528
Investments in direct financing leases, capital leases	25,826			18,159
Impairment loss	$ 5,600
Meade
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Pipeline length in miles | mi	177
Transportation and delivery capacity in dekatherms per day | MMBTU	1,700,000
Estimated Investment in Meade	$ 412,000
Ownership percentage	55.00%
Investments in unconsolidated affiliates	$ 21,700			5,800
Maximum financial exposure	$ 59,400
Constitution
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Ownership percentage	10.00%
Cash invested	$ 26,400
Investments in unconsolidated affiliates	29,500
Maximum financial exposure	26,400
Estimated investment In constitution	$ 79,000
Willams Partners L.P. | Constitution
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Ownership percentage	41.00%
Cabot Oil And Gas Corporation | Constitution
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Ownership percentage	25.00%
Piedmont Natural Gas | Constitution
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Ownership percentage	24.00%
COG Holdings LLC | Meade
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Ownership percentage	20.00%
Vega Midstream MPC LLC | Meade
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Ownership percentage	15.00%
River Road Interests LLC | Meade
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Ownership percentage	10.00%
Washington Gas Resources Corp. | American Solar Direct Holdings Inc. (ASDHI)
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Cost method investments				5,600
Impairment loss	$ 5,600
WGSW
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Investments in direct financing leases, capital leases	34,400
Residual value	7,700
Tax credits	2,600
Unearned income	15,600
Initial direct costs	700
WGSW | Sun Edison/Nextility
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Investments in direct financing leases, capital leases	29,100			19,900
Current investment recorded in accounts receivable	$ 3,300			1,700
Number of agreements | agreement	2
Number of Counterparties | company	2
WGSW | ASD Solar, LP
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Investments in unconsolidated affiliates	$ 64,300			$ 66,800
Difference between carrying amount and underlying equity	$ 35,900
WGL Midstream | Mountain Valley Pipeline
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Transportation and delivery capacity in dekatherms per day | MMBTU	2,000,000
Ownership percentage		7.00%
Investments in unconsolidated affiliates	$ 5,900
Pro rata share of project cost	$ 2,500
Mountain Valley Gas Purchase Commitment | WGL Midstream
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Transportation and delivery capacity in dekatherms per day | MMBTU			500,000
External Partners | WGL Midstream | Mountain Valley Pipeline
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Ownership interest in joint venture after funding requirements are met	3.00%
External Partners | Minimum | WGL Midstream | Mountain Valley Pipeline
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Maximum financial exposure	$ 96,000
External Partners | Maximum | WGL Midstream | Mountain Valley Pipeline
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Maximum financial exposure	105,000
Scenario, Plan | Minimum | WGL Midstream | Mountain Valley Pipeline
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Pro rata share of project cost	230,000
Scenario, Plan | Maximum | WGL Midstream | Mountain Valley Pipeline
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Pro rata share of project cost	245,000
Performance guarantee | WGL Midstream | Mountain Valley Pipeline
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Maximum financial exposure	20,000
Performance guarantee | WGL Midstream | WGL Midstream | Mountain Valley Pipeline
Summary of Investments, Other than Investments in Related Parties, Reportable Data [Line Items]
Maximum financial exposure	$ 14,000

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Derivative and Weather Related Instruments (Details) MMBTU in Thousands, shares in Millions, kWh in Millions, $ in Millions		Jun. 30, 2015 USD ($) kWh MMBTU	Sep. 30, 2014 USD ($) kWh MMBTU shares
Absolute Notional Amounts of Open Positions on Derivative Instruments
Warrant notional amounts (in shares) | shares			4.6
Interest rate swap notional principal value			$ 150.0
Balance Sheet Classification of Derivative Instruments
Netting of Collateral		$ 10.5	12.0
Total	[1]	(369.1)	(306.3)
Derivative Instruments Designated as Hedging Instruments
Balance Sheet Classification of Derivative Instruments
Gross Derivative Assets		0.0	0.0
Gross Derivative Liabilities		0.0	(1.7)
Derivative Instruments Not Designated as Hedging Instruments
Balance Sheet Classification of Derivative Instruments
Gross Derivative Assets		68.9	72.6
Gross Derivative Liabilities		(448.5)	(389.2)
Current assets- derivatives
Balance Sheet Classification of Derivative Instruments
Netting of Collateral		1.3	0.0
Total	[1]	15.7	18.3
Current assets- derivatives | Derivative Instruments Designated as Hedging Instruments
Balance Sheet Classification of Derivative Instruments
Gross Derivative Assets		0.0	0.0
Gross Derivative Liabilities		0.0	0.0
Current assets- derivatives | Derivative Instruments Not Designated as Hedging Instruments
Balance Sheet Classification of Derivative Instruments
Gross Derivative Assets		14.5	20.8
Gross Derivative Liabilities		(0.1)	(2.5)
Deferred Charges and Other Assets-Derivatives
Balance Sheet Classification of Derivative Instruments
Netting of Collateral		0.0	0.0
Total	[1]	28.3	18.7
Deferred Charges and Other Assets-Derivatives | Derivative Instruments Designated as Hedging Instruments
Balance Sheet Classification of Derivative Instruments
Gross Derivative Assets		0.0	0.0
Gross Derivative Liabilities		0.0	0.0
Deferred Charges and Other Assets-Derivatives | Derivative Instruments Not Designated as Hedging Instruments
Balance Sheet Classification of Derivative Instruments
Gross Derivative Assets		28.5	18.7
Gross Derivative Liabilities		(0.2)	0.0
Current liabilities- Derivatives
Balance Sheet Classification of Derivative Instruments
Netting of Collateral		3.5	8.0
Total	[1]	(58.8)	(48.6)
Current liabilities- Derivatives | Derivative Instruments Designated as Hedging Instruments
Balance Sheet Classification of Derivative Instruments
Gross Derivative Assets		0.0	0.0
Gross Derivative Liabilities		0.0	(1.7)
Current liabilities- Derivatives | Derivative Instruments Not Designated as Hedging Instruments
Balance Sheet Classification of Derivative Instruments
Gross Derivative Assets		23.9	15.4
Gross Derivative Liabilities		(86.2)	(70.3)
Deferred Credits-Derivatives
Balance Sheet Classification of Derivative Instruments
Netting of Collateral		5.7	4.0
Total	[1]	(354.3)	(294.7)
Deferred Credits-Derivatives | Derivative Instruments Designated as Hedging Instruments
Balance Sheet Classification of Derivative Instruments
Gross Derivative Assets		0.0	0.0
Gross Derivative Liabilities		0.0	0.0
Deferred Credits-Derivatives | Derivative Instruments Not Designated as Hedging Instruments
Balance Sheet Classification of Derivative Instruments
Gross Derivative Assets		2.0	17.7
Gross Derivative Liabilities		$ (362.0)	$ (316.4)
Asset Optimization
Absolute Notional Amounts of Open Positions on Derivative Instruments
Natural gas notional amounts (in mmbtu) | MMBTU		2,129,620	2,059,330
Retail sales
Absolute Notional Amounts of Open Positions on Derivative Instruments
Natural gas notional amounts (in mmbtu) | MMBTU		80	4,470
Electricity notional amounts (in kWhs) | kWh		4,474.0	3,831.4
Other risk-management activities
Absolute Notional Amounts of Open Positions on Derivative Instruments
Natural gas notional amounts (in mmbtu) | MMBTU		178,690	164,130
Electricity notional amounts (in kWhs) | kWh		20,683.5	16,734.1
Washington Gas Light Company
Absolute Notional Amounts of Open Positions on Derivative Instruments
Warrant notional amounts (in shares) | shares			0.0
Interest rate swap notional principal value			$ 0.0
Balance Sheet Classification of Derivative Instruments
Gross Derivative Assets	[2]	$ 26.7	26.2
Gross Derivative Liabilities	[2]	(338.4)	(308.4)
Netting of Collateral	[2]	1.3	0.9
Total	[1],[2]	(310.4)	(281.3)
Washington Gas Light Company | Current assets- derivatives
Balance Sheet Classification of Derivative Instruments
Gross Derivative Assets	[2]	5.9	3.9
Gross Derivative Liabilities	[2]	0.0	0.0
Netting of Collateral	[2]	1.3	0.0
Total	[1],[2]	7.2	3.9
Washington Gas Light Company | Deferred Charges and Other Assets-Derivatives
Balance Sheet Classification of Derivative Instruments
Gross Derivative Assets	[2]	12.4	9.5
Gross Derivative Liabilities	[2]	(0.1)	0.0
Netting of Collateral	[2]	0.0	0.0
Total	[1],[2]	12.3	9.5
Washington Gas Light Company | Current liabilities- Derivatives
Balance Sheet Classification of Derivative Instruments
Gross Derivative Assets	[2]	7.8	8.6
Gross Derivative Liabilities	[2]	(44.8)	(43.2)
Netting of Collateral	[2]	0.0	0.7
Total	[1],[2]	(37.0)	(33.9)
Washington Gas Light Company | Deferred Credits-Derivatives
Balance Sheet Classification of Derivative Instruments
Gross Derivative Assets	[2]	0.6	4.2
Gross Derivative Liabilities	[2]	(293.5)	(265.2)
Netting of Collateral	[2]	0.0	0.2
Total	[1],[2]	$ (292.9)	$ (260.8)
Washington Gas Light Company | Asset Optimization
Absolute Notional Amounts of Open Positions on Derivative Instruments
Natural gas notional amounts (in mmbtu) | MMBTU		1,372,230	1,374,090
Washington Gas Light Company | Retail sales
Absolute Notional Amounts of Open Positions on Derivative Instruments
Natural gas notional amounts (in mmbtu) | MMBTU		0	0
Electricity notional amounts (in kWhs) | kWh		0.0	0.0
Washington Gas Light Company | Other risk-management activities
Absolute Notional Amounts of Open Positions on Derivative Instruments
Natural gas notional amounts (in mmbtu) | MMBTU		137,740	139,820
Electricity notional amounts (in kWhs) | kWh		0.0	0.0

[1] WGL has elected to offset the fair value of recognized derivative instruments against the right to reclaim or the obligation to return collateral for derivative instruments executed under the same master netting arrangement in accordance with ASC 815. All recognized derivative contracts and associated financial collateral subject to a master netting arrangement or similar that is eligible for offset under ASC 815 have been presented net in the balance sheet.

[2] Washington Gas did not have any derivative instruments outstanding that were designated as hedging instruments at June 30, 2015 or September 30, 2014.

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Operating Segment Reporting (Tables)

9 Months Ended

Jun. 30, 2015

Segment Reporting [Abstract]

Operating Segment Financial Information

The following tables present operating segment information for the three and nine months ended June 30, 2015 and 2014.

Operating Segment Financial Information
(In thousands)	Operating Revenues(a)			Depreciation and Amortization			Equity in Earnings of Unconsolidated Affiliates		EBIT			Total Assets			Capital Expenditures		Equity Method Investments
Three Months Ended June 30, 2015
Regulated utility	$	190,345		$	27,740		$	—	$	(6,262	)	$	4,113,166		$	75,413	$	—
Retail energy-marketing	268,249			151			—		16,654			464,086			—		—
Commercial energy systems	14,674			2,787			544		3,750			613,124			27,271		64,323
Midstream energy services	(25,801		)	31			718		(26,607		)	203,591			85		56,967
Other activities	—			—			—		(970		)	106,861			—		—
Eliminations(b)	(6,294		)	(13		)	—		(541		)	(492,363		)	—		—
Total consolidated	$	441,173		$	30,696		$	1,262	$	(13,976	)	$	5,008,465		$	102,769	$	121,290
Three Months Ended June 30, 2014
Regulated utility	$	197,752		$	25,840		$	—	$	4,456		$	3,809,747		$	76,073	$	—
Retail energy-marketing	275,339			204			—		1,286			387,990			5		—
Commercial energy systems	14,260			1,611			733		5,012			459,509			18,171		68,309
Midstream energy services	(15,869		)	31			85		(16,806		)	181,880			—		22,426
Other activities	—			—			—		(2,391		)	224,220			—		413
Eliminations(b)	(3,982		)	(64		)	—		(532		)	(502,662		)	—		—
Total consolidated	$	467,500		$	27,622		$	818	$	(8,975	)	$	4,560,684		$	94,249	$	91,148
Nine Months Ended June 30, 2015
Regulated utility	$	1,193,232		$	81,958		$	—	$	238,645		$	4,113,166		$	235,707	$	—
Retail energy-marketing	1,003,339			470			—		39,185			464,086			5		—
Commercial energy systems	35,745			7,693			1,623		4,731			613,124			81,246		64,323
Midstream energy services	(17,997		)	93			1,865		(23,343		)	203,591			85		56,967
Other activities	—			—			750		(8,915		)	106,861			—		—
Eliminations(b)	(22,176		)	(55		)	—		(592		)	(492,363		)	—		—
Total consolidated	$	2,192,143		$	90,159		$	4,238	$	249,711		$	5,008,465		$	317,043	$	121,290
Nine Months Ended June 30, 2014
Regulated utility	$	1,304,975		$	76,945		$	—	$	158,444		$	3,809,747		$	181,821	$	—
Retail energy-marketing	1,035,711			558			—		5,186			387,990			93		—
Commercial energy systems	27,013			4,255			1,496		5,961			459,509			59,536		68,309
Midstream energy services	(21,938		)	93			355		(29,410		)	181,880			—		22,426
Other activities	—			—			—		(10,227		)	224,220			—		413
Eliminations(b)	(23,714		)	(335		)	—		110			(502,662		)	—		—
Total consolidated	$	2,322,047		$	81,516		$	1,851	$	130,064		$	4,560,684		$	241,450	$	91,148

(a) Operating revenues are reported gross of revenue taxes. Revenue taxes of both the regulated utility and the retail energy-marketing segments include gross receipt taxes. Revenue taxes of the regulated utility segment also include public service commission fees, franchise fees and energy taxes. Operating revenue amounts in the “Eliminations” row represent total intersegment revenues associated with sales from the regulated utility segment to the retail energy-marketing segment. Midstream Energy Services’ cost of energy related sales is netted with its gross revenues.

(b) Intersegment eliminations include any mark-to market valuations associated with trading activities between WGL Midstream and WGL Energy Services, intercompany loans and a timing difference between Commercial Energy Systems’ recognition of revenue for the sale of Renewable Energy Credits (RECs) to Retail Energy-Marketing and Retail Energy-Marketing’s recognition of the associated expense. Retail Energy-Marketing has recorded a portion of the REC’s purchased as inventory to be used in future periods at which time they will be expensed.

Reconciliation from EBIT to net income applicable to common stock

The following table provides a reconciliation from EBIT to net income applicable to common stock.

	Three Months Ended June 30,						Nine Months Ended June 30,
(In thousands)	2015			2014			2015		2014
Total consolidated EBIT	$	(13,976	)	$	(8,975	)	$	249,711	$	130,064
Interest expense	13,140			9,503			38,704		28,020
Income (loss) before income taxes	(27,116		)	(18,478		)	211,007		102,044
Income tax expense (benefit)	(11,756		)	(6,868		)	80,364		33,152
Net income (loss)	(15,360		)	(11,610		)	130,643		68,892
Dividends on Washington Gas Light Company preferred stock	330			330			990		990
Net income (loss) applicable to common stock	$	(15,690	)	$	(11,940	)	$	129,653	$	67,902

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Other Investment (Tables)

9 Months Ended

Jun. 30, 2015

Other Investments [Abstract]

Minimum Payments Receivable for Direct Financing Leases

Minimum future lease payments receivable under direct financing leases over the next five fiscal years and thereafter are as follows:

Minimum Payments Receivable for Direct Financing Leases
(In millions)
Remainder of 2015	$	2.4
2016	2.5
2017	2.4
2018	2.3
2019	2.2
Thereafter	22.6
Total	$	34.4

Location of Investments

The income statement location of the investments discussed in this footnote for the three and nine months ended June 30, 2015 and 2014 are as follows:

WGL Holdings, Inc. Income Statement Location of Other Investments
(In millions)	VIEs		Non-VIEs		Total		VIEs		Non-VIEs			Total
	Three Months Ended   June 30, 2015						Nine Months Ended   June 30, 2015
Equity in earnings of unconsolidated affiliates	$	0.8	$	0.5	$	1.3	$	2.4	$	1.8		$	4.2
Depreciation and amortization	0.1		—		0.1		0.2		—			0.2
Other income (expenses)—net	1.0		—		1.0		2.4		(5.6		)	(3.2		)
Net income	$	1.7	$	0.5	$	2.2	$	4.6	$	(3.8	)	$	0.8
	Three Months Ended   June 30, 2014						Nine Months Ended   June 30, 2014
Equity in earnings of unconsolidated affiliates	$	0.5	$	0.3	$	0.8	$	1.3	$	0.6		$	1.9
Depreciation and amortization	—		—		—		0.1		—			0.1
Other income—net	0.6		—		0.6		1.9		—			1.9
Net income	$	1.1	$	0.3	$	1.4	$	3.1	$	0.6		$	3.7

The balance sheet location of the investments discussed in this footnote at June 30, 2015 and September 30, 2014 are as follows:

WGL Holdings, Inc. Balance Sheet Location of Other Investments
As of June 30, 2015 (in millions)	VIEs		Non-VIEs			Total
Assets
Investments in unconsolidated affiliates	$	85.9	$	35.4		$	121.3
Investments in direct financing leases, capital leases	25.8		—			25.8
Accounts receivable	3.3		2.5		(a)	5.8
Total assets	$	115.0	$	37.9		$	152.9
As of September 30, 2014 (in millions)
Assets
Investments in unconsolidated affiliates	$	72.6	$	27.9		$	100.5
Investments in direct financing leases, capital leases	18.2		—			18.2
Accounts receivable	1.7		—			1.7
Total assets	$	92.5	$	27.9		$	120.4

^(a) Represents the financing provided to another partner in Mountain Valley to fund its capital commitment. Acquired ownership interest represents the collateral for repayment of the financing.

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Short-Term Debt

9 Months Ended

Jun. 30, 2015

Short-term Debt [Abstract]

Short-Term Debt

NOTE 3. SHORT-TERM DEBT

WGL and Washington Gas satisfy their short-term financing requirements through the sale of commercial paper or through bank borrowings. Due to the seasonal nature of the regulated utility and retail energy-marketing segments, short-term financing requirements can vary significantly during the year. Revolving credit agreements are maintained to support outstanding commercial paper and to permit short-term borrowing flexibility. The policy of each WGL and Washington Gas is to maintain bank credit facilities in amounts equal to or greater than the expected maximum commercial paper position. The following is a summary of committed credit available at June 30, 2015 and September 30, 2014.

Committed Credit Available(In millions)
June 30, 2015	WGL(b)			Washington Gas			Total Consolidated
Committed credit agreements
Unsecured revolving credit facility, expires December 19, 2019(a)	$	450.0		$	350.0		$	800.0
Less: Commercial Paper	(156.0		)	—			(156.0		)
Net committed credit available	$	294.0		$	350.0		$	644.0
Weighted average interest rate	0.27		%	—		%	0.27		%
September 30, 2014
Committed credit agreements
Unsecured revolving credit facility, expires April 3, 2017(a)	$	450.0		$	350.0		$	800.0
Less: Commercial Paper	(364.5		)	(89.0		)	(453.5		)
Net committed credit available	$	85.5		$	261.0		$	346.5
Weighted average interest rate	0.20		%	0.13		%	0.19		%

^(a)  Both WGL and Washington Gas have the right to request extensions with the banks’ approval. WGL’s revolving credit facility permits it to borrow an additional $100 million, with the banks’ approval, for a total of $550 million. Washington Gas’ revolving credit facility permits it to borrow an additional $100 million, with the banks’ approval, for a total of $450 million.

^(b)  WGL includes WGL Holdings and all subsidiaries other than Washington Gas.

In December 2014, both WGL and Washington Gas entered into a first amendment to their respective credit agreements, each dated April 3, 2012. The amendments extend the maturity date of the credit facilities from April 3, 2017 to December 19, 2019, provided that the credit facilities will terminate on September 30, 2017. Under the credit agreements, as amended, WGL and Washington Gas each have the right to request two one-year-extensions, with the banks' approval. At June 30, 2015 and September 30, 2014, there were no outstanding bank loans from WGL’s or Washington Gas’ revolving credit facilities.

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Related Party Transactions (Tables)

9 Months Ended

Jun. 30, 2015

Related Party Transactions [Abstract]

Related Party Transactions

The following table shows the amounts Washington Gas charged WGL Energy Services for balance services.

Washington Gas Light Company-Gas Balancing Service Charges
	Three Months Ended June 30,				Nine Months Ended June 30,
(In millions)	2015		2014		2015		2014
Gas balancing service charge	$	5.3	$	2.8	$	19.8	$	21.0

The following table presents the receivables and payables from associated companies as of June 30, 2015 and September 30, 2014.

Washington Gas Light Company Receivables / Payables from Associated Companies
(In millions)	June 30, 2015		September 30, 2014
Receivables from Associated Companies	$	4.8	$	4.8
Payables to Associated Companies	$	66.9	$	54.7

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Common Shareholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Sep. 30, 2014
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Common shareholders' equity, beginning balance			$ 1,246,576
Net income	$ (15,360)	$ (11,610)	130,643	$ 68,892
Other comprehensive income (loss)	245	3,986	(3,437)	4,065
Repurchase of common stock			(41,485)
Stock-based compensation			2,943
Dividends declared:
Common stock			(67,877)
Preferred stock			(990)
Common shareholders' equity, ending balance	$ 1,266,373		$ 1,266,373
Shares outstanding (in shares)	49,728,662		49,728,662		50,656,553
Common Stock
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Common shareholders' equity, beginning balance			$ 525,932
Repurchase of common stock			(41,485)
Dividends declared:
Common shareholders' equity, ending balance	$ 485,456		485,456
Paid-In Capital
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Common shareholders' equity, beginning balance			11,847
Stock-based compensation			1,934
Dividends declared:
Common shareholders' equity, ending balance	13,781		13,781
Retained Earnings
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Common shareholders' equity, beginning balance			716,758
Net income			130,643
Dividends declared:
Common stock			(67,877)
Preferred stock			(990)
Common shareholders' equity, ending balance	778,534		778,534
Accumulated Other Comprehensive Loss, Net of Taxes
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Common shareholders' equity, beginning balance			(7,961)
Other comprehensive income (loss)			(3,437)
Dividends declared:
Common shareholders' equity, ending balance	(11,398)		(11,398)
Washington Gas Light Company
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Common shareholders' equity, beginning balance			1,050,166
Net income	(11,424)	(191)	128,221	88,122
Other comprehensive income (loss)	216	$ 3,986	598	$ 4,065
Stock-based compensation			1,773
Dividends declared:
Common stock			(59,051)
Preferred stock			(990)
Common shareholders' equity, ending balance	$ 1,120,717		$ 1,120,717
Shares outstanding (in shares)	46,479,536		46,479,536		46,479,536
Washington Gas Light Company | Common Stock
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Common shareholders' equity, beginning balance			$ 46,479
Dividends declared:
Common shareholders' equity, ending balance	$ 46,479		46,479
Washington Gas Light Company | Paid-In Capital
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Common shareholders' equity, beginning balance			480,620
Stock-based compensation			1,773
Dividends declared:
Common shareholders' equity, ending balance	482,393		482,393
Washington Gas Light Company | Retained Earnings
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Common shareholders' equity, beginning balance			529,480
Net income			128,221
Dividends declared:
Common stock			(59,051)
Preferred stock			(990)
Common shareholders' equity, ending balance	597,660		597,660
Washington Gas Light Company | Accumulated Other Comprehensive Loss, Net of Taxes
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Common shareholders' equity, beginning balance			(6,413)
Other comprehensive income (loss)			598
Dividends declared:
Common shareholders' equity, ending balance	$ (5,815)		$ (5,815)

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Operating Segment (Narrative) (Details)	9 Months Ended
	Jun. 30, 2015 segment
Segment Reporting [Abstract]
Number of Operating Segments	4

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Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2015	Sep. 30, 2014
Property, Plant and Equipment
At original cost	$ 4,822,149	$ 4,582,764
Accumulated depreciation and amortization	(1,295,069)	(1,268,319)
Net property, plant and equipment	3,527,080	3,314,445
Current Assets
Cash and cash equivalents	66,051	8,811
Receivables
Accounts receivable	284,833	222,253
Gas costs and other regulatory assets	6,016	3,752
Unbilled revenues	106,672	96,314
Allowance for doubtful accounts	(26,111)	(23,341)
Net receivables	371,410	298,978
Materials and supplies—principally at average cost	20,452	23,647
Storage gas	147,506	333,602
Deferred income taxes	31,425	26,664
Prepaid taxes	9,760	66,578
Other prepayments	38,148	34,269
Derivatives	15,743	18,331
Assets held for sale	22,920	0
Other	25,012	24,635
Total current assets	748,427	835,515
Regulatory assets
Gas costs	179,392	191,346
Pension and other post-retirement benefits	175,026	192,981
Other	74,571	71,638
Prepaid post-retirement benefits	109,001	96,385
Derivatives	28,342	18,739
Investments in direct financing leases, capital leases	25,826	18,159
Investments in unconsolidated affiliates	121,290	100,528
Other	19,510	16,763
Total deferred charges and other assets	732,958	706,539
Total Assets	5,008,465	4,856,499
Capitalization
Common shareholders’ equity	1,266,373	1,246,576
Washington Gas Light Company preferred stock	28,173	28,173
Long-term debt	950,494	679,228
Total capitalization	2,245,040	1,953,977
Current Liabilities
Current maturities of long-term debt	45,000	20,000
Notes payable	156,000	453,500
Accounts payable and other accrued liabilities	275,615	313,221
Wages payable	18,906	19,995
Accrued interest	13,654	3,488
Dividends declared	23,330	22,449
Customer deposits and advance payments	73,331	68,318
Gas costs and other regulatory liabilities	29,852	22,563
Accrued taxes	35,752	14,133
Derivatives	58,836	48,555
Liabilities held for sale	1,621	0
Other	44,417	34,063
Total current liabilities	776,314	1,020,285
Deferred Credits
Unamortized investment tax credits	125,117	99,351
Deferred income taxes	672,339	660,908
Accrued pensions and benefits	125,741	120,446
Asset retirement obligations	178,783	175,203
Regulatory liabilities
Accrued asset removal costs	340,844	327,388
Other post-retirement benefits	80,965	86,428
Other	18,785	17,588
Derivatives	354,263	294,745
Other	90,274	100,180
Total deferred credits	$ 1,987,111	$ 1,882,237
Commitments and Contingencies (Note 13)
Total Capitalization and Liabilities	$ 5,008,465	$ 4,856,499
Washington Gas Light Company
Property, Plant and Equipment
At original cost	4,400,838	4,250,194
Accumulated depreciation and amortization	(1,245,555)	(1,228,130)
Net property, plant and equipment	3,155,283	3,022,064
Current Assets
Cash and cash equivalents	61,770	1,060
Receivables
Accounts receivable	157,893	121,419
Gas costs and other regulatory assets	6,016	3,752
Unbilled revenues	23,576	20,881
Allowance for doubtful accounts	(18,880)	(19,209)
Net receivables	168,605	126,843
Materials and supplies—principally at average cost	20,409	23,600
Storage gas	60,348	156,083
Deferred income taxes	17,484	22,916
Prepaid taxes	5,438	16,137
Other prepayments	12,459	14,272
Receivables from associated companies	4,838	4,821
Derivatives	7,244	3,884
Assets held for sale	22,920	0
Other	1	0
Total current assets	381,516	369,616
Regulatory assets
Gas costs	179,392	191,346
Pension and other post-retirement benefits	174,036	191,896
Other	74,503	71,584
Prepaid post-retirement benefits	108,282	95,660
Derivatives	12,291	9,455
Other	11,641	13,457
Total deferred charges and other assets	560,145	573,398
Total Assets	4,096,944	3,965,078
Capitalization
Common shareholders’ equity	1,120,717	1,050,166
Washington Gas Light Company preferred stock	28,173	28,173
Long-term debt	702,201	679,228
Total capitalization	1,851,091	1,757,567
Current Liabilities
Current maturities of long-term debt	45,000	20,000
Notes payable	0	89,000
Accounts payable and other accrued liabilities	128,968	176,467
Wages payable	17,483	18,290
Accrued interest	12,129	3,488
Dividends declared	20,221	19,722
Customer deposits and advance payments	73,084	68,318
Gas costs and other regulatory liabilities	29,852	22,563
Accrued taxes	57,609	24,610
Payables to associated companies	66,855	54,685
Derivatives	37,027	33,858
Liabilities held for sale	1,621	0
Other	6,030	7,199
Total current liabilities	495,879	538,200
Deferred Credits
Unamortized investment tax credits	5,851	6,479
Deferred income taxes	673,586	619,946
Accrued pensions and benefits	124,214	118,954
Asset retirement obligations	177,292	173,775
Regulatory liabilities
Accrued asset removal costs	340,844	327,388
Other post-retirement benefits	80,404	85,814
Other	18,785	17,588
Derivatives	292,920	260,789
Other	36,078	58,578
Total deferred credits	$ 1,749,974	$ 1,669,311
Commitments and Contingencies (Note 13)
Total Capitalization and Liabilities	$ 4,096,944	$ 3,965,078

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Derivative and Weather Related Instruments (Gains and Losses) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Gains and (Losses) on Derivative Instruments
Recorded to other comprehensive income	[1]	$ 49	$ 0	$ (7,994)	$ 0
Gains (losses) on derivative instruments		(47,600)	(33,600)	(54,800)	(408,400)
Operating revenues—non-utility
Gains and (Losses) on Derivative Instruments
Recorded to income		(28,300)	(21,300)	46,000	(105,600)
Utility cost of gas
Gains and (Losses) on Derivative Instruments
Recorded to income		(10,400)	(2,000)	(20,400)	(125,700)
Non-utility cost of energy-related sales
Gains and (Losses) on Derivative Instruments
Recorded to income		3,200	2,800	(35,900)	46,700
Other income-net
Gains and (Losses) on Derivative Instruments
Recorded to income		0	(600)	0	(500)
Gas costs
Gains and (Losses) on Derivative Instruments
Recorded to regulatory assets/liabilities		(12,100)	(12,500)	(36,000)	(224,500)
Other
Gains and (Losses) on Derivative Instruments
Recorded to regulatory assets/liabilities				0	1,200
Interest expense
Gains and (Losses) on Derivative Instruments
Recorded to income	[2]			(500)	0
Ineffectiveness of cash flow hedge	[3]			(400)
Amortization of amounts recorded to AOCI				(100)
Recorded to other comprehensive income
Gains and (Losses) on Derivative Instruments
Recorded to other comprehensive income	[3]			(8,000)	0
Gains (losses) on derivative instruments				(8,100)
Amortization of amounts recorded to AOCI	[3]			100
Washington Gas Light Company
Gains and (Losses) on Derivative Instruments
Gains (losses) on derivative instruments		(22,500)	(14,500)	(56,400)	(349,000)
Washington Gas Light Company | Operating revenues—non-utility
Gains and (Losses) on Derivative Instruments
Recorded to income		0	0	0	0
Washington Gas Light Company | Utility cost of gas
Gains and (Losses) on Derivative Instruments
Recorded to income		(10,400)	(2,000)	(20,400)	(125,700)
Washington Gas Light Company | Non-utility cost of energy-related sales
Gains and (Losses) on Derivative Instruments
Recorded to income		0	0	0	0
Washington Gas Light Company | Other income-net
Gains and (Losses) on Derivative Instruments
Recorded to income		0	0	0	0
Washington Gas Light Company | Gas costs
Gains and (Losses) on Derivative Instruments
Recorded to regulatory assets/liabilities		$ (12,100)	$ (12,500)	(36,000)	(224,500)
Washington Gas Light Company | Other
Gains and (Losses) on Derivative Instruments
Recorded to regulatory assets/liabilities				0	1,200
Washington Gas Light Company | Interest expense
Gains and (Losses) on Derivative Instruments
Recorded to income	[2]			0	0
Washington Gas Light Company | Recorded to other comprehensive income
Gains and (Losses) on Derivative Instruments
Recorded to other comprehensive income	[3]			$ 0	$ 0

[1] Cash flow hedging instruments represent interest rate swaps agreements on debt issuances. Refer to Note 8- Derivative and weather-related instruments for further discussion of the interest rate swap agreements.

[2] Represents $(0.4) million of ineffectiveness for our cash flow hedge and $(0.1) million of amortization of amounts previously recorded to Accumulated Other Comprehensive Income.

[3] Represents the effective portion of our cash flow hedge of $(8.1) million less $(0.1) million of amortization that was reclassified to interest expense.

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Accounting Policies

9 Months Ended

Jun. 30, 2015

Accounting Policies [Abstract]

Accounting Policies

NOTE 1. ACCOUNTING POLICIES

Basis of Presentation

WGL Holdings, Inc. (WGL) is a holding company that owns all of the shares of common stock of Washington Gas Light Company (Washington Gas), a regulated natural gas utility, all of the shares of common stock of Washington Gas Resources Corporation (Washington Gas Resources) and Hampshire Gas Company (Hampshire). Washington Gas Resources owns all of the shares of common stock of four non-utility subsidiaries that include WGL Energy Services, Inc. (WGL Energy Services), WGL Energy Systems, Inc. (WGL Energy Systems), WGL Midstream, Inc. (WGL Midstream) and WGSW, Inc. (WGSW). Except where the content clearly indicates otherwise, “WGL,” “we,” “us” or “our” refers to the holding company or the consolidated entity of WGL Holdings, Inc. and all of its subsidiaries. Unless otherwise noted, these notes apply equally to WGL and Washington Gas.

The condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). Therefore, certain financial information and note disclosures accompanying annual financial statements prepared in accordance with generally accepted accounting principles in the United States of America (GAAP) are omitted in this interim report. The interim consolidated financial statements and accompanying notes should be read in conjunction with the combined Annual Report on Form 10-K for WGL and Washington Gas for the fiscal year ended September 30, 2014. Due to the seasonal nature of our businesses, the results of operations for the periods presented in this report are not necessarily indicative of actual results for the full fiscal years ending September 30, 2015 and 2014 of either WGL or Washington Gas.

The accompanying unaudited financial statements for WGL and Washington Gas reflect all normal recurring adjustments that are necessary, in our opinion, to present fairly the results of operations in accordance with GAAP.

For a complete description of our accounting policies, refer to Note 1 of the Notes to Consolidated Financial Statements of the combined Annual Report on Form 10-K for WGL and Washington Gas for the fiscal year ended September 30, 2014.

Assets Held for Sale

At June 30, 2015, the Springfield Operations Center met the criteria to be reported as held for sale. Among other things, those criteria specify that (a) the asset must be available for immediate sale in its present condition subject only to terms that are usual and customary for sales of such assets and (b) the sale of the asset must be probable, and its transfer expected to qualify for recognition as a completed sale, within one year, with certain exceptions. The assets and liabilities associated with the Springfield Operations Center were reported as "Assets held for sale" and "Liabilities held for sale" on WGL's and Washington Gas' balance sheets as of June 30, 2015. Washington Gas recorded approximately $0.5 million in transaction fees in "Operations and maintenance expense" in the accompanying statements of income related to selling the facility.

Storage Gas Valuations

For Washington Gas and WGL Energy Services, storage gas inventories are stated at the lower-of-cost or market as determined using the first-in, first-out method. For WGL Midstream, storage gas inventory is stated at the lower-of-cost or market using the weighted average cost method. Interim period inventory losses attributable to lower-of-cost or market adjustments may be reversed if the market value of the inventory is recovered by the end of the same fiscal year.

The following table shows the lower-of-cost or market (LCM) adjustments recorded to net income for the three and nine months ended June 30, 2015 and 2014.

Lower-of-Cost or Market Adjustments Pre-Tax Increase (Decrease) to Net Income
	Three Months Ended June 30,					Nine Months Ended June 30,
(In millions)	2015		2014			2015			2014
WGL(a)
Operating revenues - non-utility	$	0.9	$	(0.8	)	$	(19.6	)	$	(0.8	)
Washington Gas
Utility cost of gas	$	—	$	—		$	(1.0	)	$	(0.4	)
Total Consolidated	$	0.9	$	(0.8	)	$	(20.6	)	$	(1.2	)

(a) WGL includes WGL Holdings and all subsidiaries other than Washington Gas.

ACCOUNTING STANDARDS ADOPTED IN FISCAL YEAR 2015
Standard	Description	Date of adoption	Effect on the financial statements or other significant matters
ASU 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (Topic 740)	The standard requires an unrecognized tax benefit, or a portion of an unrecognized tax benefit to be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar loss, or a tax credit carryforward.	October 1, 2014	As a result of the implementation of this standard, we reduced our deferred tax assets by a portion of our unrecognized tax benefits. The adoption of this standard did not have a material effect on our financial statements.

OTHER NEWLY ISSUED ACCOUNTING STANDARDS
Standard	Description	Date of adoption	Effect on the financial statements or other significant matters
ASU 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Cost	The standard requires an entity to present debt issuance costs in the balance sheet as a direct deduction of the debt liability in a manner consistent with its accounting treatment of debt discounts.	October 1, 2016	We are in the process of evaluating the impact the adoption of this standard will have on our financial statements.
ASU 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis	The standard changes the analysis to be performed in determining whether certain types of legal entities should be consolidated, specifically the analysis of limited partnerships and similar entities, fee arrangements and related party relationships.	October 1, 2016	We are in the process of evaluating the impact the adoption of this standard will have on our financial statements.
ASU 2014-09, Revenue from Contracts with Customers (Topic 606)	The standard establishes a comprehensive revenue recognition model clarifying the method used to determine the timing and requirements for revenue recognition from contracts with customers. The disclosure requirements under the new standard will enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers.	October 1, 2018	We are in the process of evaluating the impact the adoption of this standard will have on our financial statements.

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Other Investments Income Statement Location Table (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net Income (Loss) Attributable to Parent [Abstract]
Equity in earnings of unconsolidated affiliates	$ 1,262	$ 818	$ 4,238	$ 1,851
Other income (expenses)-net	2,329	(304)	(1,688)	257
NET INCOME (LOSS)	(15,360)	(11,610)	130,643	68,892
VIEs
Net Income (Loss) Attributable to Parent [Abstract]
Equity in earnings of unconsolidated affiliates	800	500	2,400	1,300
Depreciation and amortization	100	0	200	100
Other income (expenses)-net	1,000	600	2,400	1,900
NET INCOME (LOSS)	1,700	1,100	4,600	3,100
Non VIEs
Net Income (Loss) Attributable to Parent [Abstract]
Equity in earnings of unconsolidated affiliates	500	300	1,800	600
Depreciation and amortization	0	0	0	0
Other income (expenses)-net	0	0	(5,600)	0
NET INCOME (LOSS)	500	300	(3,800)	600
Total Other Investments
Net Income (Loss) Attributable to Parent [Abstract]
Equity in earnings of unconsolidated affiliates	1,300	800	4,200	1,900
Depreciation and amortization	100	0	200	100
Other income (expenses)-net	1,000	600	(3,200)	1,900
NET INCOME (LOSS)	$ 2,200	$ 1,400	$ 800	$ 3,700

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Accumulated Other Comprehensive Income (Loss) (Tables)

9 Months Ended

Jun. 30, 2015

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Changes in Accumulated Other Comprehensive Income (Loss) by Component

The following tables show the changes in accumulated other comprehensive income (loss) for WGL and Washington Gas by component for the three and nine months ended June 30, 2015 and 2014.

WGL Holdings, Inc. Changes in Accumulated Other Comprehensive Loss by Component
(In thousands)	Three Months Ended June 30,						Nine Months Ended June 30,
	2015			2014			2015			2014
Beginning Balance	$	(11,643	)	$	(10,969	)	$	(7,961	)	$	(11,048	)
Qualified cash flow hedging instruments(a)	49			—			(7,994		)	—
Change in prior service cost (credit) (b)	(170		)	6,204			(511		)	6,135
Amortization of actuarial loss (b)	529			404			1,503			604
Current-period other comprehensive income (loss)	408			6,608			(7,002		)	6,739
Income tax expense (benefit) related to other comprehensive income (loss)	163			2,622			(3,565		)	2,674
Ending Balance	$	(11,398	)	$	(6,983	)	$	(11,398	)	$	(6,983	)

(a) Cash flow hedging instruments represent interest rate swaps agreements on debt issuances. Refer to Note 8- Derivative and weather-related instruments for further discussion of the interest rate swap agreements.

(b) These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost. Refer to Note 14- Pension and other post-retirement benefit plans for additional details.

Washington Gas Light Company Changes in Accumulated Other Comprehensive Loss by Component
(In thousands)	Three Months Ended June 30,						Nine Months Ended June 30,
	2015			2014			2015			2014
Beginning Balance	$	(6,031	)	$	(10,969	)	$	(6,413	)	$	(11,048	)
Change in prior service cost (credit) (a)	(170		)	6,204			(511		)	6,135
Amortization of actuarial loss (a)	529			404			1,503			604
Current-period other comprehensive income	359			6,608			992			6,739
Income tax expense related to other comprehensive income	143			2,622			394			2,674
Ending Balance	$	(5,815	)	$	(6,983	)	$	(5,815	)	$	(6,983	)

^(a)  These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost. Refer to Note 14-Pension and other post-retirement benefit plans for additional details.

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Accounting Policies (Tables)

9 Months Ended

Jun. 30, 2015

Accounting Policies [Abstract]

Lower of Cost or Market Adjustments

The following table shows the lower-of-cost or market (LCM) adjustments recorded to net income for the three and nine months ended June 30, 2015 and 2014.

Lower-of-Cost or Market Adjustments Pre-Tax Increase (Decrease) to Net Income
	Three Months Ended June 30,					Nine Months Ended June 30,
(In millions)	2015		2014			2015			2014
WGL(a)
Operating revenues - non-utility	$	0.9	$	(0.8	)	$	(19.6	)	$	(0.8	)
Washington Gas
Utility cost of gas	$	—	$	—		$	(1.0	)	$	(0.4	)
Total Consolidated	$	0.9	$	(0.8	)	$	(20.6	)	$	(1.2	)

(a) WGL includes WGL Holdings and all subsidiaries other than Washington Gas.

Schedule of Accounting Policies

ACCOUNTING STANDARDS ADOPTED IN FISCAL YEAR 2015
Standard	Description	Date of adoption	Effect on the financial statements or other significant matters
ASU 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (Topic 740)	The standard requires an unrecognized tax benefit, or a portion of an unrecognized tax benefit to be presented in the financial statements as a reduction to a deferred tax asset for a net operating loss carryforward, a similar loss, or a tax credit carryforward.	October 1, 2014	As a result of the implementation of this standard, we reduced our deferred tax assets by a portion of our unrecognized tax benefits. The adoption of this standard did not have a material effect on our financial statements.

OTHER NEWLY ISSUED ACCOUNTING STANDARDS
Standard	Description	Date of adoption	Effect on the financial statements or other significant matters
ASU 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Cost	The standard requires an entity to present debt issuance costs in the balance sheet as a direct deduction of the debt liability in a manner consistent with its accounting treatment of debt discounts.	October 1, 2016	We are in the process of evaluating the impact the adoption of this standard will have on our financial statements.
ASU 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis	The standard changes the analysis to be performed in determining whether certain types of legal entities should be consolidated, specifically the analysis of limited partnerships and similar entities, fee arrangements and related party relationships.	October 1, 2016	We are in the process of evaluating the impact the adoption of this standard will have on our financial statements.
ASU 2014-09, Revenue from Contracts with Customers (Topic 606)	The standard establishes a comprehensive revenue recognition model clarifying the method used to determine the timing and requirements for revenue recognition from contracts with customers. The disclosure requirements under the new standard will enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers.	October 1, 2018	We are in the process of evaluating the impact the adoption of this standard will have on our financial statements.

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Accounting Policies (Details) $ in Millions		3 Months Ended		9 Months Ended
		Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) subsidiary	Jun. 30, 2014 USD ($)
Inventory [Line Items]
Lower of cost or market adjustment		$ 0.9	$ (0.8)	$ (20.6)	$ (1.2)
Washington Gas Resources
Inventory [Line Items]
Number of subsidiaries | subsidiary				4
WGL | Operating revenues - non-utility
Inventory [Line Items]
Lower of cost or market adjustment	[1]	0.9	(0.8)	$ (19.6)	(0.8)
Washington Gas Light Company
Inventory [Line Items]
Operation and maintenance expense				0.5
Washington Gas Light Company | Utility cost of gas
Inventory [Line Items]
Lower of cost or market adjustment		$ 0.0	$ 0.0	$ (1.0)	$ (0.4)

[1] WGL includes WGL Holdings and all subsidiaries other than Washington Gas.

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Short-Term Debt (Tables)

9 Months Ended

Jun. 30, 2015

Short-term Debt [Abstract]

Committed Credit Available

The following is a summary of committed credit available at June 30, 2015 and September 30, 2014.

Committed Credit Available(In millions)
June 30, 2015	WGL(b)			Washington Gas			Total Consolidated
Committed credit agreements
Unsecured revolving credit facility, expires December 19, 2019(a)	$	450.0		$	350.0		$	800.0
Less: Commercial Paper	(156.0		)	—			(156.0		)
Net committed credit available	$	294.0		$	350.0		$	644.0
Weighted average interest rate	0.27		%	—		%	0.27		%
September 30, 2014
Committed credit agreements
Unsecured revolving credit facility, expires April 3, 2017(a)	$	450.0		$	350.0		$	800.0
Less: Commercial Paper	(364.5		)	(89.0		)	(453.5		)
Net committed credit available	$	85.5		$	261.0		$	346.5
Weighted average interest rate	0.20		%	0.13		%	0.19		%

^(a)  Both WGL and Washington Gas have the right to request extensions with the banks’ approval. WGL’s revolving credit facility permits it to borrow an additional $100 million, with the banks’ approval, for a total of $550 million. Washington Gas’ revolving credit facility permits it to borrow an additional $100 million, with the banks’ approval, for a total of $450 million.

^(b)  WGL includes WGL Holdings and all subsidiaries other than Washington Gas.

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Accounts Payable and Other Accrued Liabilities

9 Months Ended

Jun. 30, 2015

Accounts Payable and Accrued Liabilities [Abstract]

Accounts Payable and Other Accrued Liabilities

NOTE 2. ACCOUNTS PAYABLE AND OTHER ACCRUED LIABILITIES

The tables below provide details for the amounts included in “Accounts payable and other accrued liabilities” on the balance sheets for both WGL and Washington Gas.

WGL Holdings, Inc.
(In millions)	June 30, 2015		September 30, 2014
Accounts payable—trade	$	234.6	$	278.8
Employee benefits and payroll accruals	25.8		19.8
Other accrued liabilities	15.2		14.6
Total	$	275.6	$	313.2

Washington Gas Light Company
(In millions)	June 30, 2015		September 30, 2014
Accounts payable—trade	$	96.4	$	146.4
Employee benefits and payroll accruals	24.1		18.2
Other accrued liabilities	8.5		11.9
Total	$	129.0	$	176.5

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Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
OPERATING REVENUES
Utility		$ 185,179	$ 194,901	$ 1,173,396	$ 1,283,697
Non-utility		255,994	272,599	1,018,747	1,038,350
Total Operating Revenues	[1]	441,173	467,500	2,192,143	2,322,047
OPERATING EXPENSES
Utility cost of gas		59,286	64,448	499,128	710,436
Non-utility cost of energy-related sales		240,808	266,321	933,911	997,958
Operation and maintenance		98,642	89,964	295,309	277,805
Depreciation and Amortization		30,696	27,622	90,159	81,516
General taxes and other assessments		29,308	28,634	126,475	126,376
Total Operating Expenses		458,740	476,989	1,944,982	2,194,091
OPERATING INCOME (LOSS)		(17,567)	(9,489)	247,161	127,956
Equity in Earnings of Unconsolidated Affiliates		1,262	818	4,238	1,851
Other income (expenses)—net		2,329	(304)	(1,688)	257
Interest expense		13,140	9,503	38,704	28,020
INCOME (LOSS) BEFORE INCOME TAXES		(27,116)	(18,478)	211,007	102,044
INCOME TAX EXPENSE (BENEFIT)		(11,756)	(6,868)	80,364	33,152
NET INCOME (LOSS)		(15,360)	(11,610)	130,643	68,892
Dividends on Washington Gas Light Company preferred stock		330	330	990	990
NET INCOME (LOSS) APPLICABLE TO COMMON STOCK		$ (15,690)	$ (11,940)	$ 129,653	$ 67,902
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING
Basic (in shares)		49,729	51,921	49,814	51,871
Diluted (in shares)		49,729	51,921	50,056	51,885
EARNINGS (LOSS) PER AVERAGE COMMON SHARE
Basic (in dollars per share)		$ (0.32)	$ (0.23)	$ 2.60	$ 1.31
Diluted (in dollars per share)		(0.32)	(0.23)	2.59	1.31
DIVIDENDS DECLARED PER COMMON SHARE (in dollars per share)		$ 0.4625	$ 0.4400	$ 1.3650	$ 1.3000
Washington Gas Light Company
OPERATING REVENUES
Utility		$ 190,345	$ 197,752	$ 1,193,232	$ 1,304,975
OPERATING EXPENSES
Utility cost of gas		64,452	67,249	518,945	731,452
Operation and maintenance		80,077	75,286	240,714	223,798
Depreciation and Amortization		27,348	25,500	80,832	75,942
General taxes and other assessments		25,197	25,391	114,903	116,190
Total Operating Expenses		197,074	193,426	955,394	1,147,382
OPERATING INCOME (LOSS)		(6,729)	4,326	237,838	157,593
Other income (expenses)—net		(129)	(304)	(748)	(394)
Interest expense		10,637	9,422	31,465	27,694
INCOME (LOSS) BEFORE INCOME TAXES		(17,495)	(5,400)	205,625	129,505
INCOME TAX EXPENSE (BENEFIT)		(6,071)	(5,209)	77,404	41,383
NET INCOME (LOSS)		(11,424)	(191)	128,221	88,122
Dividends on Washington Gas Light Company preferred stock		330	330	990	990
NET INCOME (LOSS) APPLICABLE TO COMMON STOCK		$ (11,754)	$ (521)	$ 127,231	$ 87,132

[1] Operating revenues are reported gross of revenue taxes. Revenue taxes of both the regulated utility and the retail energy-marketing segments include gross receipt taxes. Revenue taxes of the regulated utility segment also include public service commission fees, franchise fees and energy taxes. Operating revenue amounts in the “Eliminations” row represent total intersegment revenues associated with sales from the regulated utility segment to the retail energy-marketing segment. Midstream Energy Services’ cost of energy related sales is netted with its gross revenues.

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Related Party Transactions

9 Months Ended

Jun. 30, 2015

Related Party Transactions [Abstract]

Related Party Transactions

NOTE 12. RELATED PARTY TRANSACTIONS

WGL and its subsidiaries engage in transactions in the ordinary course of business. Inter-company transactions and balances have been eliminated from the consolidated financial statements of WGL, except as described below. Washington Gas provides accounting, treasury, legal and other administrative and general support to affiliates, and files consolidated tax returns that include affiliated taxable transactions. Washington Gas bills its affiliates in accordance with regulatory requirements for the actual cost of providing these services, which approximates their market value. To the extent such billings are not paid, they are reflected in “Receivables from associated companies” on Washington Gas’ balance sheets. Washington Gas assigns or allocates these costs directly to its affiliates and, therefore, does not recognize revenues or expenses associated with providing these services.

In connection with billing for unregulated third party marketers and with other miscellaneous billing processes, Washington Gas collects cash on behalf of affiliates and transfers the cash in a reasonable time period. Cash collected by Washington Gas on behalf of its affiliates but not transferred is recorded in “Payables to associated companies” on Washington Gas’ balance sheets. The following table presents the receivables and payables from associated companies as of June 30, 2015 and September 30, 2014.

Washington Gas Light Company Receivables / Payables from Associated Companies
(In millions)	June 30, 2015		September 30, 2014
Receivables from Associated Companies	$	4.8	$	4.8
Payables to Associated Companies	$	66.9	$	54.7

Washington Gas provides gas balancing services related to storage, injections, withdrawals and deliveries to all energy marketers participating in the sale of natural gas on an unregulated basis through the customer choice programs that operate in its service territory. These balancing services include the sale of natural gas supply commodities related to various peaking arrangements contractually supplied to Washington Gas and then partially allocated and assigned by Washington Gas to the energy marketers, including WGL Energy Services. Washington Gas records revenues for these balancing services pursuant to tariffs approved by the appropriate regulatory bodies. These related party amounts related to balancing services provided to WGL Energy Services have been eliminated in the consolidated financial statements of WGL. The following table shows the amounts Washington Gas charged WGL Energy Services for balance services.

Washington Gas Light Company-Gas Balancing Service Charges
	Three Months Ended June 30,				Nine Months Ended June 30,
(In millions)	2015		2014		2015		2014
Gas balancing service charge	$	5.3	$	2.8	$	19.8	$	21.0

As a result of these balancing services, an imbalance is created for volumes of natural gas received by Washington Gas that are not equal to the volumes of natural gas delivered to customers of the energy marketers. WGL Energy Services recognized accounts payable to Washington Gas in the amount of $7.0 million and an accounts receivable from Washington Gas in the amount of $0.02 million at June 30, 2015 and September 30, 2014, respectively, related to an imbalance in gas volumes. Due to regulatory treatment, these payables and receivables are not eliminated in the consolidated financial statements of WGL. Refer to Note 1—Accounting Policies of the Notes to Consolidated Financial Statements of the combined Annual Report on Form 10-K for the fiscal year ended September 30, 2014 for further discussion of these imbalance transactions.

Washington Gas participates in a Purchase of Receivables (POR) program as approved by the PSC of MD, whereby it purchases receivables from participating energy marketers at approved discount rates. In addition, WGL Energy Services participates in POR programs with certain Maryland and Pennsylvania utilities, whereby it sells its receivables to various utilities, including Washington Gas, at approved discount rates. The receivables purchased by Washington Gas are included in “Accounts receivable” in the accompanying balance sheet. Any activity between Washington Gas and WGL Energy Services related to the POR program has been eliminated in the accompanying financial statements for WGL. At June 30, 2015 and September 30, 2014, Washington Gas had balances of $21.2 million and $7.7 million, respectively, of purchased receivables from WGL Energy Services.

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Document and Entity Information - shares	9 Months Ended
	Jun. 30, 2015	Jul. 31, 2015
Document Information [Line Items]
Entity Registrant Name	WGL Holdings Inc.
Entity Central Index Key	0001103601
Document Type	10-Q
Document Period End Date	Jun. 30, 2015
Amendment Flag	false
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--09-30
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		49,728,662
Washington Gas Light Company
Document Information [Line Items]
Entity Registrant Name	Washington Gas Light Company
Entity Central Index Key	0000104819
Document Type	10-Q
Document Period End Date	Jun. 30, 2015
Amendment Flag	false
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q3
Current Fiscal Year End Date	--09-30
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		0

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Commitments and Contingencies

9 Months Ended

Jun. 30, 2015

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

NOTE 13. COMMITMENTS AND CONTINGENCIES

REGULATED UTILITY OPERATIONS

The following table summarizes the minimum contractual payments that Washington Gas will make under its pipeline transportation, storage and peaking contracts, as well as minimum contractual payments to purchase natural gas for the next five fiscal years and thereafter.

Washington Gas Contract Minimums
(In millions)	Pipeline Contracts(a)		Gas Purchase Commitments(b)
Remainder of 2015	$	55.4	$	42.4
2016	218.7		359.6
2017	210.5		465.4
2018	211.3		460.9
2019	202.7		453.2
Thereafter	1,172.5		5,577.2
Total	$	2,071.1	$	7,358.7

^(a)  Represents minimum payments for natural gas transportation, storage and peaking contracts that have expiration dates through fiscal year 2031.

^(b)  Includes known and reasonably likely commitments to purchase natural gas. Cost estimates are based on market prices at June 30, 2015.

REGULATORY CONTINGENCIES

Certain legal and administrative proceedings incidental to our business, including regulatory contingencies, involve WGL and/or its subsidiaries. In our opinion, we have recorded an adequate provision for probable losses or refunds to customers for regulatory contingencies related to these proceedings.

Virginia Gas Reserves. In the 2014 Session, the General Assembly of the Commonwealth of Virginia amended Title 56 of the Virginia Code. The legislative provisions are intended to encourage regulated utilities to invest in natural gas reserves, upstream pipelines and facilities that are reasonably expected to benefit customers by lowering costs, reducing volatility or lowering the utility’s supply risk. A regulated utility company can obtain the recovery through its rates charged to customers for the entire incurred cost, including the return of and a return on the investment in reserves, as well as all operating costs.

Pursuant to the legislation, on May 6, 2015, WGL entered into a 20-year agreement with Energy Corporation of America (ECA) to acquire natural gas reserves through non-operating working interests in 25 producing wells located in Pennsylvania's Appalachian Basin for $126 million.

The purchase of the reserves is conditional upon approval by the Commonwealth of Virginia's State Corporation Commission (SCC of VA). Washington Gas filed an application with the SCC of VA on May 12, 2015, for approval of the gas reserves purchase agreement with ECA. Under a procedural schedule established by the SCC of VA to consider the application, a public hearing is scheduled on September 30, 2015. Under the law, the SCC of VA must issue a final decision on the application within 180 days, or by November 8, 2015.

NON-UTILITY OPERATIONS

On November 30, 2014, WGL through its subsidiary, WGL Midstream, entered into a gas sale and purchase, and capacity agreement with GAIL Global (USA) LNG LLC, a subsidiary of GAIL (India) Limited, under which WGL Midstream has agreed to sell and deliver a minimum of 340,000 dekatherms per day and up to 430,000 dekatherms per day of natural gas, for a term of 20 years from the in-service date of the export facility. The contract price is based on index pricing, but certain gas sales will occur at a market price per dekatherm of gas based on the estimate of prices prevailing at designated delivery points.

WGL Midstream will make deliveries using transportation capacity released by GAIL through an asset management arrangement. On March 10, 2015, WGL Midstream entered into gas purchase commitments to buy 500,000 dekatherms of natural gas per day at index based prices for a 20-year term. We will also be a shipper on the Mountain Valley Pipeline. These commitments were executed in conjunction with the investment in Mountain Valley.

As a result of these agreements, purchase commitments for WGL Midstream have increased as reflected in the table below. The following table summarizes the minimum commitments and contractual obligations of WGL Energy Services and WGL Midstream for the next five fiscal years and thereafter.

Contract Minimums
	WGL Energy Services						WGL Midstream
(In millions)	Gas Purchase Commitments(a)		Pipeline Contracts(b)		Electric Purchase Commitments(c)		Gas Purchase Commitments(d)		Pipeline Contracts(b)		Total
Remainder of 2015	$	37.1	$	1.5	$	153.3	$	20.9	$	5.9	$	218.7
2016	146.3		2.2		418.1		258.9		20.4		845.9
2017	57.3		2.0		171.3		389.5		18.2		638.3
2018	6.7		1.5		36.5		1,217.4		15.4		1,277.5
2019	—		0.8		2.0		1,747.8		60.7		1,811.3
Thereafter	—		1.7		0.5		35,647.5		1,093.2		36,742.9
Total	$	247.4	$	9.7	$	781.7	$	39,282.0	$	1,213.8	$	41,534.6

^(a)  Represents fixed price commitments with city gate equivalent deliveries.

^(b)  Represents minimum payments for natural gas transportation and storage contracts that have expiration dates through fiscal year 2044.

^(c)  Represents electric purchase commitments that are based on existing fixed price and fixed volume contracts. Includes $18.2 million of commitments related to renewable energy credits.

^(d)  Includes known and reasonably likely commitments to purchase natural gas. Cost estimates are based on forward market prices as of June 30, 2015.

FINANCIAL GUARANTEES

WGL has guaranteed payments primarily for certain purchases of natural gas and electricity on behalf of WGL Energy Services and for certain purchase commitments on behalf of WGL Midstream. At June 30, 2015, these guarantees totaled $224.8 million and $311.8 million for WGL Energy Services and WGL Midstream, respectively. At June 30, 2015, WGL also had guarantees on behalf of other subsidiaries totaling $9.1 million. The amount of such guarantees is periodically adjusted to reflect changes in the level of financial exposure related to these commitments. For all of our financial guarantees, WGL may cancel any or all future obligations upon written notice to the counterparty, but WGL would continue to be responsible for the obligations created under the guarantees prior to the effective date of the cancellation. WGL has also guaranteed payments for certain of our external partners. At June 30, 2015, these guarantees totaled $8.1 million and the fair value of these guarantees was insignificant.

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Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Jun. 30, 2015		Jun. 30, 2014	Jun. 30, 2015		Jun. 30, 2014
Net Income (Loss)		$ (15,360)		$ (11,610)	$ 130,643		$ 68,892
OTHER COMPREHENSIVE INCOME (LOSS) BEFORE INCOME TAXES:
Qualified cash flow hedging instruments	[1]	49		0	(7,994)		0
Pension and other post-retirement benefit plans
Change in prior service cost (credit)	[2]	(170)		6,204	(511)		6,135
Change in actuarial net loss	[2]	529		404	1,503		604
Total pension and other post-retirement benefit plans		359		6,608	992		6,739
INCOME TAX EXPENSE (BENEFIT) RELATED TO OTHER COMPREHENSIVE INCOME		163		2,622	(3,565)		2,674
OTHER COMPREHENSIVE INCOME (LOSS)		245		3,986	(3,437)		4,065
COMPREHENSIVE INCOME (LOSS)		(15,115)		(7,624)	127,206		72,957
Washington Gas Light Company
Net Income (Loss)		(11,424)		(191)	128,221		88,122
Pension and other post-retirement benefit plans
Change in prior service cost (credit)	[3]	(170)	[2]	6,204	(511)	[2]	6,135
Change in actuarial net loss	[3]	529	[2]	404	1,503	[2]	604
Total pension and other post-retirement benefit plans		359		6,608	992		6,739
INCOME TAX EXPENSE (BENEFIT) RELATED TO OTHER COMPREHENSIVE INCOME		143		2,622	394		2,674
OTHER COMPREHENSIVE INCOME (LOSS)		216		3,986	598		4,065
COMPREHENSIVE INCOME (LOSS)		$ (11,208)		$ 3,795	$ 128,819		$ 92,187

[1] Cash flow hedging instruments represent interest rate swaps agreements on debt issuances. Refer to Note 8- Derivative and weather-related instruments for further discussion of the interest rate swap agreements.

[2] These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost. Refer to Note 14- Pension and other post-retirement benefit plans for additional details.

[3] These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost. Refer to Note 14-Pension and other post-retirement benefit plans for additional details.

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Income Taxes

9 Months Ended

Jun. 30, 2015

Income Tax Disclosure [Abstract]

Income Taxes

NOTE 7. INCOME TAXES

As of June 30, 2015 and September 30, 2014, our uncertain tax positions were approximately $31.1 million and $32.6 million, respectively, primarily due to the change in tax accounting for repairs. If the amounts of unrecognized tax benefits are eventually realized, it would not materially impact the effective tax rate. It is reasonably possible that the amount of the unrecognized tax benefit with respect to some of WGL’s and Washington Gas’ uncertain tax positions will significantly increase or decrease in the next 12 months. At this time, however, an estimate of the range of reasonably possible outcomes cannot be determined.

Under ASC Topic 740, Income Taxes, Washington Gas recognizes any accrued interest associated with uncertain tax positions in interest expense and recognizes any accrued penalties associated with uncertain tax positions in other expenses in the statements of income. At June 30, 2015, we did not have an accrual of interest expense related to uncertain tax positions. At September 30, 2014, we had a total accrual of $0.1 million of interest expense related to uncertain tax positions included in other deferred credits in the accompanying balance sheets.

WGL files a consolidated federal tax return and various other state returns. We are no longer subject to income tax examinations by the Internal Revenue Service for years ended prior to September 30, 2011. Substantially all state income tax years in major jurisdictions are closed for years ended prior to September 30, 2010.

Washington Gas charged the Maryland portion of the Medicare Part D (Med D) regulatory asset to tax expense during the fiscal year ended September 30, 2012 based on positions taken by the Maryland Public Service Commission (PSC of MD) in Washington Gas’ rate case during that fiscal year that did not permit recovery. Washington Gas received an order in the first quarter of fiscal year ended September 30, 2014 from the PSC of MD that did allow recovery of the Med D regulatory asset over a five year amortization period beginning December 2013. Therefore, the reinstatement of the regulatory asset is reflected in the effective tax rate for the nine months ended June 30, 2014.

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Earnings Per Share

9 Months Ended

Jun. 30, 2015

Earnings Per Share [Abstract]

Earnings Per Share

NOTE 6. EARNINGS PER SHARE

Basic EPS of WGL is computed by dividing net income by the weighted average number of common shares outstanding during the reported period. Diluted EPS assumes the issuance of common shares pursuant to stock-based compensation plans at the beginning of the applicable period unless the effect of such issuance would be anti-dilutive. The following table reflects the computation of our basic and diluted EPS for the three and nine months ended June 30, 2015 and 2014.

Basic and Diluted EPS
(in thousands, except per share data)	Net Income (Loss) Applicable to Common Stock			Shares	Per Share Amount
Three Months Ended June 30, 2015
Basic EPS	$	(15,690	)	49,729	$	(0.32	)
Stock-based compensation plans	—			—
Diluted EPS	$	(15,690	)	49,729	$	(0.32	)
Three Months Ended June 30, 2014
Basic EPS	$	(11,940	)	51,921	$	(0.23	)
Stock-based compensation plans	—			—
Diluted EPS	$	(11,940	)	51,921	$	(0.23	)
Nine Months Ended June 30, 2015
Basic EPS	$	129,653		49,814	$	2.60
Stock-based compensation plans	—			242
Diluted EPS	$	129,653		50,056	$	2.59
Nine Months Ended June 30, 2014
Basic EPS	$	67,902		51,871	$	1.31
Stock-based compensation plans	—			14
Diluted EPS	$	67,902		51,885	$	1.31

We incurred a net loss for the three months ended June 30, 2015 and June 30, 2014; therefore, all common shares issuable pursuant to stock-based compensation plans, were not considered in the diluted loss per share calculations due to the anti-dilutive effect of such shares. These shares include performance shares of 317,000 shares for the three months ended June 30, 2015, and weighted average stock option and dividend reinvestment shares of 5,000 shares and 2,000 shares, respectively, for the three months ended June 30, 2014. There were no anti-dilutive shares for the nine months ended June 30, 2015 or 2014.

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Accounts Payable and Other Accrued Liabilities (Tables)

9 Months Ended

Jun. 30, 2015

Accounts Payable and Other Accrued Liabilities [Line Items]

Accounts Payable and Other Accrued Liabilities

The tables below provide details for the amounts included in “Accounts payable and other accrued liabilities” on the balance sheets for both WGL and Washington Gas.

WGL Holdings, Inc.
(In millions)	June 30, 2015		September 30, 2014
Accounts payable—trade	$	234.6	$	278.8
Employee benefits and payroll accruals	25.8		19.8
Other accrued liabilities	15.2		14.6
Total	$	275.6	$	313.2

Washington Gas Light Company

Accounts Payable and Other Accrued Liabilities [Line Items]

Accounts Payable and Other Accrued Liabilities

Washington Gas Light Company
(In millions)	June 30, 2015		September 30, 2014
Accounts payable—trade	$	96.4	$	146.4
Employee benefits and payroll accruals	24.1		18.2
Other accrued liabilities	8.5		11.9
Total	$	129.0	$	176.5

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Pension and Other Post-Retirement Benefit Plans

9 Months Ended

Jun. 30, 2015

Pension and Other Postretirement Benefit Expense [Abstract]

Pension and Other Post-Retirement Benefit Plans

NOTE 14. PENSION AND OTHER POST-RETIREMENT BENEFIT PLANS

The following table shows the components of net periodic benefit costs (income) recognized in our financial statements during the three and nine months ended June 30, 2015 and 2014.

Components of Net Periodic Benefit Costs (Income)
	Three Months Ended June 30,
	2015						2014
(In millions)	Pension Benefits			Health and Life Benefits			Pension Benefits			Health and Life Benefits
Service cost	$	3.9		$	1.8		$	3.5		$	1.6
Interest cost	9.7			3.7			10.1			3.8
Expected return on plan assets	(11.2		)	(5.2		)	(10.2		)	(4.9		)
Amortization of prior service cost (credit)	0.1			(3.8		)	0.1			(3.8		)
Amortization of actuarial loss	4.7			1.1			4.2			1.6
Net periodic benefit cost (income)	7.2			(2.4		)	7.7			(1.7		)
Amount allocated to construction projects	(1.2		)	0.5			(1.1		)	0.1
Amortization of regulatory asset/liability—net	1.8			(0.1		)	1.7			0.2
Amount charged (credited) to expense	$	7.8		$	(2.0	)	$	8.3		$	(1.4	)
	Nine Months Ended June 30,
	2015						2014
Service cost	$	11.6		$	5.3		$	10.5		$	5.9
Interest cost	29.3			11.0			30.3			14.8
Expected return on plan assets	(33.5		)	(15.6		)	(30.7		)	(14.4		)
Amortization of prior service cost (credit)	0.2			(11.4		)	0.2			(5.8		)
Amortization of actuarial loss	14.1			3.3			12.6			3.5
Net periodic benefit cost (income)	21.7			(7.4		)	22.9			4.0
Amount allocated to construction projects	(3.4		)	1.5			(3.1		)	(0.7		)
Amortization of regulatory asset/liability—net	5.3			(0.2		)	5.3			0.4
Amount charged (credited) to expense	$	23.6		$	(6.1	)	$	25.1		$	3.7

Amounts included in the line item “Amortization of regulatory asset/liability—net,” as shown in the table above, represent the amortization of previously unrecovered costs of the applicable pension benefits or the health and life benefits as approved in the District of Columbia. These balances are being amortized over a five year period.

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Operating Segment Reporting

9 Months Ended

Jun. 30, 2015

Segment Reporting [Abstract]

Operating Segment Reporting

NOTE 10. OPERATING SEGMENT REPORTING

We have four reportable operating segments: regulated utility, retail energy-marketing, commercial energy systems and midstream energy services. The division of these segments into separate revenue generating components is based upon regulation, products and services. Our chief operating decision maker is our Chief Executive Officer. During the first quarter of 2015, our chief operating decision maker began evaluating segment performance based on Earnings Before Interest and Taxes (EBIT). EBIT is defined as earnings before interest and taxes from continuing operations. Items we do not include in EBIT are interest expense, intercompany financing activity, dividends on Washington Gas preferred stock, and income taxes. EBIT includes transactions between reportable segments. We also evaluate our operating segments based on other relevant factors, such as penetration into their respective markets and return on equity.

Our four segments are summarized below.

• Regulated Utility – The regulated utility segment is our core business. It consists of Washington Gas and Hampshire. Washington Gas provides regulated gas distribution services (including the sale and delivery of natural gas) to end use customers and natural gas transportation services to an unaffiliated natural gas distribution company in West Virginia under a Federal Energy Regulatory Commission (FERC) approved interstate transportation service operating agreement. Hampshire provides regulated interstate natural gas storage services to Washington Gas under a FERC approved interstate storage service tariff.

• Retail Energy-Marketing – The retail energy-marketing segment consists of WGL Energy Services, which sells natural gas and electricity directly to retail customers in competition with regulated utilities and unregulated gas and electricity marketers.

• Commercial Energy Systems – The commercial energy systems segment consists of WGL Energy Systems which provides clean and energy efficient solutions including commercial solar, energy efficiency and combined heat and power projects and other distributed generation solutions to government and commercial clients. In addition, this segment comprises the operations of WGSW, a holding company formed to invest in alternative energy assets.

• Midstream Energy Services – The midstream energy services segment consists of WGL Midstream, which engages in acquiring, investing in, managing and optimizing natural gas storage and transportation assets.

Activities and transactions that are not significant enough on a stand-alone basis to warrant treatment as an operating segment, and that do not fit into one of our four operating segments, are aggregated as “Other Activities” in the Operating Segment Financial Information presented below. Administrative and business development activity costs associated with WGL and Washington Gas Resources are included in “Other Activities”.

The following tables present operating segment information for the three and nine months ended June 30, 2015 and 2014.

Operating Segment Financial Information
(In thousands)	Operating Revenues(a)			Depreciation and Amortization			Equity in Earnings of Unconsolidated Affiliates		EBIT			Total Assets			Capital Expenditures		Equity Method Investments
Three Months Ended June 30, 2015
Regulated utility	$	190,345		$	27,740		$	—	$	(6,262	)	$	4,113,166		$	75,413	$	—
Retail energy-marketing	268,249			151			—		16,654			464,086			—		—
Commercial energy systems	14,674			2,787			544		3,750			613,124			27,271		64,323
Midstream energy services	(25,801		)	31			718		(26,607		)	203,591			85		56,967
Other activities	—			—			—		(970		)	106,861			—		—
Eliminations(b)	(6,294		)	(13		)	—		(541		)	(492,363		)	—		—
Total consolidated	$	441,173		$	30,696		$	1,262	$	(13,976	)	$	5,008,465		$	102,769	$	121,290
Three Months Ended June 30, 2014
Regulated utility	$	197,752		$	25,840		$	—	$	4,456		$	3,809,747		$	76,073	$	—
Retail energy-marketing	275,339			204			—		1,286			387,990			5		—
Commercial energy systems	14,260			1,611			733		5,012			459,509			18,171		68,309
Midstream energy services	(15,869		)	31			85		(16,806		)	181,880			—		22,426
Other activities	—			—			—		(2,391		)	224,220			—		413
Eliminations(b)	(3,982		)	(64		)	—		(532		)	(502,662		)	—		—
Total consolidated	$	467,500		$	27,622		$	818	$	(8,975	)	$	4,560,684		$	94,249	$	91,148
Nine Months Ended June 30, 2015
Regulated utility	$	1,193,232		$	81,958		$	—	$	238,645		$	4,113,166		$	235,707	$	—
Retail energy-marketing	1,003,339			470			—		39,185			464,086			5		—
Commercial energy systems	35,745			7,693			1,623		4,731			613,124			81,246		64,323
Midstream energy services	(17,997		)	93			1,865		(23,343		)	203,591			85		56,967
Other activities	—			—			750		(8,915		)	106,861			—		—
Eliminations(b)	(22,176		)	(55		)	—		(592		)	(492,363		)	—		—
Total consolidated	$	2,192,143		$	90,159		$	4,238	$	249,711		$	5,008,465		$	317,043	$	121,290
Nine Months Ended June 30, 2014
Regulated utility	$	1,304,975		$	76,945		$	—	$	158,444		$	3,809,747		$	181,821	$	—
Retail energy-marketing	1,035,711			558			—		5,186			387,990			93		—
Commercial energy systems	27,013			4,255			1,496		5,961			459,509			59,536		68,309
Midstream energy services	(21,938		)	93			355		(29,410		)	181,880			—		22,426
Other activities	—			—			—		(10,227		)	224,220			—		413
Eliminations(b)	(23,714		)	(335		)	—		110			(502,662		)	—		—
Total consolidated	$	2,322,047		$	81,516		$	1,851	$	130,064		$	4,560,684		$	241,450	$	91,148

(a) Operating revenues are reported gross of revenue taxes. Revenue taxes of both the regulated utility and the retail energy-marketing segments include gross receipt taxes. Revenue taxes of the regulated utility segment also include public service commission fees, franchise fees and energy taxes. Operating revenue amounts in the “Eliminations” row represent total intersegment revenues associated with sales from the regulated utility segment to the retail energy-marketing segment. Midstream Energy Services’ cost of energy related sales is netted with its gross revenues.

(b) Intersegment eliminations include any mark-to market valuations associated with trading activities between WGL Midstream and WGL Energy Services, intercompany loans and a timing difference between Commercial Energy Systems’ recognition of revenue for the sale of Renewable Energy Credits (RECs) to Retail Energy-Marketing and Retail Energy-Marketing’s recognition of the associated expense. Retail Energy-Marketing has recorded a portion of the REC’s purchased as inventory to be used in future periods at which time they will be expensed.

The following table provides a reconciliation from EBIT to net income applicable to common stock.

	Three Months Ended June 30,						Nine Months Ended June 30,
(In thousands)	2015			2014			2015		2014
Total consolidated EBIT	$	(13,976	)	$	(8,975	)	$	249,711	$	130,064
Interest expense	13,140			9,503			38,704		28,020
Income (loss) before income taxes	(27,116		)	(18,478		)	211,007		102,044
Income tax expense (benefit)	(11,756		)	(6,868		)	80,364		33,152
Net income (loss)	(15,360		)	(11,610		)	130,643		68,892
Dividends on Washington Gas Light Company preferred stock	330			330			990		990
Net income (loss) applicable to common stock	$	(15,690	)	$	(11,940	)	$	129,653	$	67,902

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Related Party Transactions (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Sep. 30, 2014
Washington Gas Light Company
Related Party Transaction [Line Items]
Receivables from associated companies	$ 4,800		$ 4,800		$ 4,800
Payables to associated companies	66,900		66,900		54,700
WGL Energy Services | Washington Gas Light Company
Related Party Transaction [Line Items]
Accounts payable, related parties	7,000		7,000
Accounts receivable, related parties					20
Washington Gas Light Company
Related Party Transaction [Line Items]
Receivables from associated companies	4,838		4,838		4,821
Payables to associated companies	66,855		66,855		54,685
Washington Gas Light Company | WGL Energy Services
Related Party Transaction [Line Items]
Gas balancing service charge	5,300	$ 2,800	19,800	$ 21,000
Receivables purchased from related party	$ 21,200		$ 21,200		$ 7,700

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Derivative and Weather Related Instruments

9 Months Ended

Jun. 30, 2015

Derivative Instrument Detail [Abstract]

Derivative and Weather-Related Instruments

NOTE 8. DERIVATIVE AND WEATHER-RELATED INSTRUMENTS

DERIVATIVE INSTRUMENTS

Regulated Utility Operations

Washington Gas enters into contracts that qualify as derivative instruments and are accounted for under ASC Topic 815. These derivative instruments are recorded at fair value on our balance sheet and Washington Gas does not designate any derivatives as hedges under ASC Topic 815. Washington Gas’ derivative instruments relate to: (i) Washington Gas’ asset optimization program; (ii) managing price risk associated with the purchase of gas to serve utility customers and (iii) managing interest rate risk.

Asset Optimization. Washington Gas optimizes the value of its long-term natural gas transportation and storage capacity resources during periods when these resources are not being used to physically serve utility customers. Specifically, Washington Gas utilizes its transportation capacity assets to benefit from favorable natural gas prices between different geographic locations and utilizes its storage capacity assets to benefit from favorable natural gas prices between different time periods. As part of this asset optimization program, Washington Gas enters into physical and financial derivative transactions in the form of forward, futures and option contracts with the primary objective of locking in operating margins that Washington Gas will ultimately realize. The derivatives used under this program are subject to mark-to-market accounting treatment while the capacity and transportation resources are not.

Regulatory sharing mechanisms allow the profit from these transactions to be shared between Washington Gas’ shareholders and customers; therefore, any changes in fair value are recorded through earnings, or as regulatory assets or liabilities to the extent that gains and losses associated with these derivative instruments will be included in the rates charged to customers when they are realized. Valuation changes for the portion of net profits to be retained for shareholders may cause significant period-to-period volatility in earnings from unrealized gains and losses. This volatility does not change the locked-in operating margins that Washington Gas expects to ultimately realize from these transactions through the use of its storage and transportation capacity resources.

All physically and financially settled contracts under our asset optimization program are reported on a net basis in the statements of income in “Utility cost of gas.” Total net margins recorded to “Utility cost of gas” after sharing and management fees associated with all asset optimization transactions for the three months ended June 30, 2015 was a loss of $2.9 million including an unrealized loss of $10.4 million. During the three months ended June 30, 2014 we recorded a gain of $1.9 million including an unrealized loss of $1.2 million. Total net margins recorded for the nine months ended June 30, 2015 was a gain of $14.2 million including an unrealized loss of $13.3 million. During the nine months ended June 30, 2014, we recorded a loss of $78.3 million including an unrealized loss of $105.3 million.

Managing Price Risk. To manage price risk associated with acquiring natural gas supply for utility customers, Washington Gas enters into forward contracts, option contracts, financial contracts and other contracts, as authorized by its regulators. These instruments are accounted for as derivative instruments. Any gains and losses associated with these derivatives are recorded as regulatory liabilities or assets, respectively, to reflect the rate treatment for these economic hedging activities.

Managing Interest-Rate Risk. Washington Gas utilizes derivative instruments that are designed to minimize the risk of interest-rate volatility associated with planned issuances of debt securities. Any gains and losses associated with these types of derivatives are recorded as regulatory liabilities or assets, respectively, and amortized in accordance with regulatory requirements, typically over the life of the newly issued debt.

Non-Utility Operations

Asset Optimization. WGL Midstream enters into derivative contracts for the purpose of optimizing its storage and transportation capacity as well as managing the transportation and storage assets on behalf of third parties. WGL Midstream does not designate these derivatives as hedges under ASC Topic 815; therefore, changes in the fair value of these derivative instruments are reflected in the earnings of our non-utility operations and may cause significant period-to-period volatility in earnings. The storage and transportation capacities utilized by WGL Midstream are not considered to be derivative instruments, and thus they are not recorded at fair value on our consolidated balance sheets.

Managing Price Risk. WGL Energy Services enters into certain derivative contracts as part of managing the price risk associated with the sale and purchase of natural gas and electricity. WGL Energy Services designates a portion of these physical contracts related to the purchase of natural gas and electricity to serve our customers as "normal purchases and normal sales" and therefore, they are not subject to the fair value accounting requirements of ASC Topic 815. Derivative instruments not designated as "normal purchases and normal sales" are recorded at fair value on our consolidated balance sheets, and changes in the fair value of these derivative instruments are reflected in the earnings of our non-utility operations, which may cause significant period-to-period volatility in earnings. WGL Energy Services does not designate derivatives as hedges under ASC Topic 815.

Managing Interest-Rate Risk. WGL utilizes derivative instruments that are designed to minimize the risk of interest-rate volatility associated with future debt issuances. WGL elected cash flow hedge accounting for its interest rate derivative instruments, which settled with the issuance of the related debt issuance in the first quarter of 2015. The effective portion of the gains and losses on the hedge were recorded within other comprehensive income and are being amortized over the life of the debt (through 2044). The amortization will be minimal for fiscal 2015.

Consolidated Operations

Reflected in the tables below is information for WGL as well as Washington Gas. The information for WGL includes derivative instruments for both utility and non-utility operations.

At June 30, 2015 and September 30, 2014, respectively, the absolute notional amounts of our derivatives were as follows:

Absolute Notional Amounts of Open Positions on Derivative Instruments
Derivative transactions	WGL Holdings, Inc.	Washington Gas
June 30, 2015	Notional Amounts
Natural Gas(In millions of therms)
Asset Optimization	21,296.2	13,722.3
Retail sales	0.8	—
Other risk-management activities	1,786.9	1,377.4
Electricity(In millions of kWhs)
Retail sales	4,474.0	—
Other risk-management activities	20,683.5	—
September 30, 2014
Natural Gas(In millions of therms)
Asset Optimization	20,593.3	13,740.9
Retail sales	44.7	—
Other risk-management activities	1,641.3	1,398.2
Electricity(In millions of kWhs)
Retail sales	3,831.4	—
Other risk-management activities	16,734.1	—
Warrants(In millions of shares)	4.6	—
Interest Rate Swaps(In millions of dollars)	150.0	—

The following tables present the balance sheet classification for all derivative instruments as of June 30, 2015 and September 30, 2014.

WGL Holdings, Inc. Balance Sheet Classification of Derivative Instruments
(In millions)	Derivative Instruments Not Designated as Hedging Instruments					Derivative Instruments Designated as Hedging Instruments
As of June 30, 2015	Gross Derivative Assets		Gross Derivative Liabilities			Gross Derivative Assets		Gross Derivative Liabilities			Netting of Collateral		Total(a)
Current Assets—Derivatives	$	14.5	$	(0.1	)	$	—	$	—		$	1.3	$	15.7
Deferred Charges and Other Assets—Derivatives	28.5		(0.2		)	—		—			—		28.3
Current Liabilities—Derivatives	23.9		(86.2		)	—		—			3.5		(58.8		)
Deferred Credits—Derivatives	2.0		(362.0		)	—		—			5.7		(354.3		)
Total	$	68.9	$	(448.5	)	$	—	$	—		$	10.5	$	(369.1	)
As of September 30, 2014
Current Assets—Derivatives	$	20.8	$	(2.5	)	$	—	$	—		$	—	$	18.3
Deferred Charges and Other Assets—Derivatives	18.7		—			—		—			—		18.7
Current Liabilities—Derivatives	15.4		(70.3		)	—		(1.7		)	8.0		(48.6		)
Deferred Credits—Derivatives	17.7		(316.4		)	—		—			4.0		(294.7		)
Total	$	72.6	$	(389.2	)	$	—	$	(1.7	)	$	12.0	$	(306.3	)

Washington Gas Light Company Balance Sheet Classification of Derivative Instruments(b)
(In millions)
As of June 30, 2015	Gross Derivative Assets		Gross Derivative Liabilities			Netting of Collateral		Total(a)
Current Assets—Derivatives	$	5.9	$	—		$	1.3	$	7.2
Deferred Charges and Other Assets—Derivatives	12.4		(0.1		)	—		12.3
Current Liabilities—Derivatives	7.8		(44.8		)	—		(37.0		)
Deferred Credits—Derivatives	0.6		(293.5		)	—		(292.9		)
Total	$	26.7	$	(338.4	)	$	1.3	$	(310.4	)
As of September 30, 2014
Current Assets—Derivatives	$	3.9	$	—		$	—	$	3.9
Deferred Charges and Other Assets—Derivatives	9.5		—			—		9.5
Current Liabilities—Derivatives	8.6		(43.2		)	0.7		(33.9		)
Deferred Credits—Derivatives	4.2		(265.2		)	0.2		(260.8		)
Total	$	26.2	$	(308.4	)	$	0.9	$	(281.3	)

(a) WGL has elected to offset the fair value of recognized derivative instruments against the right to reclaim or the obligation to return collateral for derivative instruments executed under the same master netting arrangement in accordance with ASC 815. All recognized derivative contracts and associated financial collateral subject to a master netting arrangement or similar that is eligible for offset under ASC 815 have been presented net in the balance sheet.

(b) Washington Gas did not have any derivative instruments outstanding that were designated as hedging instruments at June 30, 2015 or September 30, 2014.

The following table presents all gains and losses associated with derivative instruments for the three and nine months ended June 30, 2015 and 2014.

Gains and Losses on Derivative Instruments
(In millions)	WGL Holdings, Inc.						Washington Gas
Three Months Ended June 30,	2015			2014			2015			2014
Recorded to income
Operating revenues—non-utility	$	(28.3	)	$	(21.3	)	$	—		$	—
Utility cost of gas	(10.4		)	(2.0		)	(10.4		)	(2.0		)
Non-utility cost of energy-related sales	3.2			2.8			—			—
Other income-net	—			(0.6		)	—			—
Recorded to regulatory assets
Gas costs	(12.1		)	(12.5		)	(12.1		)	(12.5		)
Total	$	(47.6	)	$	(33.6	)	$	(22.5	)	$	(14.5	)
Nine Months Ended June 30,	2015			2014			2015			2014
Recorded to income
Operating revenues—non-utility	$	46.0		$	(105.6	)	$	—		$	—
Utility cost of gas	(20.4		)	(125.7		)	(20.4		)	(125.7		)
Non-utility cost of energy-related sales	(35.9		)	46.7			—			—
Other income-net	—			(0.5		)	—			—
Interest expense(a)	(0.5		)	—			—			—
Recorded to regulatory assets
Gas costs	(36.0		)	(224.5		)	(36.0		)	(224.5		)
Other	—			1.2			—			1.2
Recorded to other comprehensive income(b)	(8.0		)	—			—			—
Total	$	(54.8	)	$	(408.4	)	$	(56.4	)	$	(349.0	)

(a) Represents $(0.4) million of ineffectiveness for our cash flow hedge and $(0.1) million of amortization of amounts previously recorded to Accumulated Other Comprehensive Income.

(b) Represents the effective portion of our cash flow hedge of $(8.1) million less $(0.1) million of amortization that was reclassified to interest expense.

Collateral

WGL utilizes standardized master netting agreements, which facilitate the netting of cash flows into a single net exposure for a given counterparty. As part of these master netting agreements, cash, letters of credit and parental guarantees may be required to be posted or obtained from counterparties in order to mitigate credit risk related to both derivatives and non-derivative positions. Under WGL’s offsetting policy, collateral balances are offset against the related counterparties’ derivative positions to the extent the application would not result in the over-collateralization of those derivative positions on the balance sheet. At June 30, 2015, Washington Gas, WGL Energy Services and WGL Midstream posted $6.5 million, $8.9 million and $9.9 million, respectively, of collateral deposits with counterparties that were not offset against open and settled derivative contracts. At September 30, 2014, Washington Gas, WGL Energy Services and WGL Midstream posted $8.2 million, $5.7 million and $11.4 million, respectively, of collateral deposits with counterparties that were not offset against open and settled derivative contracts. At June 30, 2015, Washington Gas, WGL Energy Services and WGL Midstream held $4.1 million, $0.1 million and $0.1 million, respectively of cash collateral representing an obligation to counterparties that was not offset against open and settled derivative contracts. At September 30, 2014, Washington Gas held $2.5 million of cash collateral representing an obligation to counterparties that was not offset against open and settled derivative contracts. Any collateral posted that is not offset against open and settled derivative contracts is included in “Other prepayments” in the accompanying balance sheet. Collateral received and not offset against open and settled derivative contracts is included in “Customer deposits and advance payments” in the accompanying balance sheet.

Certain derivative instruments of Washington Gas, WGL Energy Services and WGL Midstream contain contract provisions that require collateral to be posted if the credit rating of Washington Gas or WGL falls below certain levels or if counterparty exposure to WGL Energy Services or WGL Midstream exceeds a certain level. Due to counterparty exposure levels, at June 30, 2015, WGL Energy Services posted $5.7 million of collateral related to its derivative liabilities that contained credit-related contingent features. At September 30, 2014, WGL Energy Services posted $5.3 million of collateral related to such derivative liabilities. Washington Gas and WGL Midstream were not required to post any collateral related to their respective derivative liabilities that contained credit-related contingent features at June 30, 2015 or September 30, 2014. The following table shows the aggregate fair value of all derivative instruments with credit-related contingent features that are in a liability position, as well as the maximum amount of collateral that would be required if the most intrusive credit-risk-related contingent features underlying these agreements were triggered on June 30, 2015 and September 30, 2014, respectively.

Potential Collateral Requirements for Derivative Liabilities with Credit-Risk-Contingent Features
(In millions)	WGL Holdings, Inc.		Washington Gas
June 30, 2015
Derivative liabilities with credit-risk-contingent features	$	54.4	$	20.1
Maximum potential collateral requirements	46.6		20.0
September 30, 2014
Derivative liabilities with credit-risk-contingent features	$	28.8	$	20.6
Maximum potential collateral requirements	16.5		16.1

Washington Gas, WGL Energy Services and WGL Midstream do not enter into derivative contracts for speculative purposes.

Concentration of Credit Risk

We are exposed to credit risk from derivative instruments with wholesale counterparties, which is represented by the fair value of these instruments at the reporting date. We actively monitor and work to minimize counterparty concentration risk through various practices. At June 30, 2015, two counterparties represented over 10% of Washington Gas’ credit exposure to wholesale derivative counterparties for a total credit risk of $23.4 million; two counterparties represented over 10% of WGL Energy Services’ credit exposure to wholesale counterparties for a total credit risk of $0.2 million; and two counterparties represented over 10% of WGL Midstream’s credit exposure to wholesale counterparties for a total credit risk of $15.0 million.

WEATHER-RELATED INSTRUMENTS

Washington Gas did not use any weather-related instruments during the three and nine months ended June 30, 2015 and 2014.

WGL Energy Services utilizes weather-related instruments for managing the financial effects of weather risks. These instruments cover a portion of WGL Energy Services’ estimated revenue or energy-related cost exposure to variations in heating or cooling degree days. These contracts provide for payment to WGL Energy Services of a fixed-dollar amount for every degree day over or under specific levels during the calculation period depending upon the type of contract executed. For the three months ended June 30, 2015 and 2014, WGL Energy Services recorded pre-tax losses of $0.5 million and $0.9 million, respectively, related to these contracts. For the nine months ended June 30, 2015 and 2014, WGL Energy Services recorded pre-tax gains of $2.7 million and $4.5 million, respectively, related to these contracts.

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Fair Value Measurements

9 Months Ended

Jun. 30, 2015

Fair Value Disclosures [Abstract]

Fair Value Measurements

NOTE 9. FAIR VALUE MEASUREMENTS

Recurring Basis

We measure the fair value of our financial assets and liabilities using a combination of the income and market approach in accordance with ASC Topic 820. These financial assets and liabilities primarily consist of derivatives recorded on our balance sheet under ASC Topic 815 and short-term investments, commercial paper and long-term debt outstanding required to be disclosed at fair value. Under ASC Topic 820, fair value is defined as the exit price, representing the amount that would be received in the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. To value our financial instruments, we use market data or assumptions that market participants would use, including assumptions about credit risk (both our own credit risk and the counterparty’s credit risk) and the risks inherent in the inputs to valuation.

We enter into derivative contracts in the futures and over-the-counter (OTC) wholesale and retail markets. These markets are the principal markets for the respective wholesale and retail contracts. Our relevant market participants are our existing counterparties and others who have participated in energy transactions at our delivery points. These participants have access to the same market data as WGL. We value our derivative contracts based on an “in-exchange” premise, and valuations are generally based on pricing service data or indicative broker quotes depending on the market location. We measure the net credit exposure at the counterparty level where the right to set-off exists. The net exposure is determined using the mark-to-market exposure adjusted for collateral, letters of credit and parent guarantees. We use published default rates from Standard & Poor’s Ratings Services and Moody’s Investors Service as inputs for determining credit adjustments.

ASC Topic 820 establishes a fair value hierarchy that prioritizes the inputs used to measure fair value. The hierarchy gives the highest priority to unadjusted quoted prices in active markets for identical assets or liabilities and the lowest priority to unobservable inputs. The three levels of the fair value hierarchy under ASC Topic 820 are described below:

Level 1.Level 1 of the fair value hierarchy consists of assets or liabilities that are valued using observable inputs based upon unadjusted quoted prices in active markets for identical assets or liabilities at the reporting date. Level 1 assets and liabilities primarily include exchange traded derivatives and securities. WGL did not have any Level 1 derivatives at June 30, 2015 or September 30, 2014.

Level 2.Level 2 of the fair value hierarchy consists of assets or liabilities that are valued using directly or indirectly observable inputs either corroborated with market data or based on exchange traded market data. Level 2 includes fair values based on industry-standard valuation techniques that consider various assumptions: (i) quoted forward prices, including the use of mid-market pricing within a bid/ask spread; (ii) discount rates; (iii) implied volatility and (iv) other economic factors. Substantially all of these assumptions are observable throughout the full term of the instrument, can be derived from observable data or are supported by observable levels at which transactions are executed in the relevant market. At June 30, 2015 and September 30, 2014, Level 2 financial assets and liabilities included energy-related derivatives such as financial contracts, options and physical forward contracts for deliveries at active market locations.

Level 3.Level 3 of the fair value hierarchy consists of assets or liabilities that are valued using significant unobservable inputs at the reporting date. These unobservable assumptions reflect our assumptions about estimates that market participants would use in pricing the asset or liability, including natural gas basis prices, annualized volatilities of natural gas prices, and electricity congestion prices. A significant change to any one of these inputs in isolation could result in a significant upward or downward fluctuation in the fair value measurement. These inputs may be used with industry standard valuation methodologies that result in our best estimate of fair value for the assets or liabilities at the reporting date.

Our Risk Analysis and Mitigation (RA&M) Group determines the valuation policies and procedures. The RA&M Group reports to WGL’s Chief Financial Officer. In accordance with WGL’s valuation policy, we may utilize a variety of valuation methodologies to determine the fair value of Level 3 derivative contracts, including internally developed valuation inputs and pricing models. The prices used in our valuations are corroborated using multiple pricing sources, and we periodically conduct assessments to determine whether each valuation model is appropriate for its intended purpose. The RA&M Group also evaluates changes in fair value measurements on a daily basis.

At June 30, 2015 and September 30, 2014, Level 3 derivative assets and liabilities included: (i) physical contracts valued at illiquid market locations with no observable market data; (ii) long-dated positions where observable pricing is not available over the life of the contract; (iii) contracts valued using historical spot price volatility assumptions and (iv) valuations using indicative broker quotes for inactive market locations.

The following tables set forth financial instruments recorded at fair value as of June 30, 2015 and September 30, 2014, respectively. A financial instrument’s classification within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Our assessment of the significance of a particular input to the fair value measurement requires judgment, and may affect the valuation of fair value assets and liabilities and their placement within the fair value hierarchy.

WGL Holdings, Inc. Fair Value Measurements Under the Fair Value Hierarchy
(In millions)	Level 1		Level 2			Level 3			Total
At June 30, 2015
Assets
Natural gas related derivatives	$	—	$	22.4		$	22.4		$	44.8
Electricity related derivatives	—		2.1			22.0			24.1
Total Assets	$	—	$	24.5		$	44.4		$	68.9
Liabilities
Natural gas related derivatives	$	—	$	(41.0	)	$	(373.4	)	$	(414.4	)
Electricity related derivatives	—		(3.3		)	(30.8		)	(34.1		)
Total Liabilities	$	—	$	(44.3	)	$	(404.2	)	$	(448.5	)
At September 30, 2014
Assets
Natural gas related derivatives	$	—	$	22.7		$	33.7		$	56.4
Electricity related derivatives	—		0.3			15.9			16.2
Total Assets	$	—	$	23.0		$	49.6		$	72.6
Liabilities
Natural gas related derivatives	$	—	$	(39.8	)	$	(328.4	)	$	(368.2	)
Electricity related derivatives	—		(0.1		)	(20.9		)	(21.0		)
Interest rate derivatives	—		(1.7		)	—			(1.7		)
Total Liabilities	$	—	$	(41.6	)	$	(349.3	)	$	(390.9	)

Washington Gas Light Company Fair Value Measurements Under the Fair Value Hierarchy
(In millions)	Level 1		Level 2			Level 3			Total
At June 30, 2015
Assets
Natural gas related derivatives	$	—	$	14.8		$	11.9		$	26.7
Total Assets	$	—	$	14.8		$	11.9		$	26.7
Liabilities
Natural gas related derivatives	$	—	$	(19.3	)	$	(319.1	)	$	(338.4	)
Total Liabilities	$	—	$	(19.3	)	$	(319.1	)	$	(338.4	)
At September 30, 2014
Assets
Natural gas related derivatives	$	—	$	13.5		$	12.7		$	26.2
Total Assets	$	—	$	13.5		$	12.7		$	26.2
Liabilities
Natural gas related derivatives	$	—	$	(25.1	)	$	(283.3	)	$	(308.4	)
Total Liabilities	$	—	$	(25.1	)	$	(283.3	)	$	(308.4	)

The following table includes quantitative information about the significant unobservable inputs used in the fair value measurement of our Level 3 financial instruments and the respective fair values of the net derivative asset and liability positions, by contract type, as of June 30, 2015 and September 30, 2014.

Quantitative Information about Level 3 Fair Value Measurements
(In millions)	Net Fair Value June 30, 2015	Valuation Techniques	Unobservable Inputs	Range
WGL Holdings, Inc.
Natural gas related derivatives	$(351.0)	Discounted Cash Flow	Natural Gas Basis Price (per dekatherm)	($1.629) - $4.920
		Option Model	Natural Gas Basis Price (per dekatherm)	($0.153) - ($0.090)
			Annualized Volatility of Spot Market Natural Gas	30.5% to 40.2%
Electricity related derivatives	$(8.8)	Discounted Cash Flow	Electricity Congestion Price (per megawatt hour)	($3.965) - $83.900
Washington Gas Light Company
Natural gas related derivatives	$(307.2)	Discounted Cash Flow	Natural Gas Basis Price (per dekatherm)	($1.629) - $4.920
	Net Fair Value September 30, 2014
WGL Holdings, Inc.
Natural gas related derivatives	$(294.7)	Discounted Cash Flow	Natural Gas Basis Price (per dekatherm)	($2.101) - $6.154
		Option Model	Natural Gas Basis Price (per dekatherm)	($1.675) - $6.154
			Annualized Volatility of Spot Market Natural Gas	30.9% - 589.6%
Electricity related derivatives	$(5.0)	Discounted Cash Flow	Electricity Congestion Price (per megawatt hour)	($2.85) - $90.95
Washington Gas Light Company
Natural gas related derivatives	$(270.6)	Discounted Cash Flow	Natural Gas Basis Price (per dekatherm)	($2.101) - $6.154

The following tables are a summary of the changes in the fair value of our derivative instruments that are measured at net fair value on a recurring basis in accordance with ASC Topic 820 using significant Level 3 inputs during the three and nine months ended June 30, 2015 and 2014, respectively.

WGL Holdings, Inc. Reconciliation of Fair Value Measurements Using Significant Level 3 Inputs
(In millions)	Natural Gas Related Derivatives			Electricity Related Derivatives			Warrants			Total
Three Months Ended June 30, 2015
Balance at April 1, 2015	$	(319.6	)	$	(10.5	)	$	—		$	(330.1	)
Realized and unrealized gains (losses)
Recorded to income	(33.6		)	(4.8		)	—			(38.4		)
Recorded to regulatory assets—gas costs	(7.7		)	—			—			(7.7		)
Transfers out of Level 3	3.9			—			—			3.9
Purchases	—			3.9			—			3.9
Settlements	6.0			2.6			—			8.6
Balance at June 30, 2015	$	(351.0	)	$	(8.8	)	$	—		$	(359.8	)
Three Months Ended June 30, 2014
Balance at April 1, 2014	$	(432.3	)	$	(2.2	)	$	1.2		$	(433.3	)
Realized and unrealized gains (losses)
Recorded to income	(19.0		)	(2.3		)	(0.6		)	(21.9		)
Recorded to regulatory assets—gas costs	(15.9		)	—			—			(15.9		)
Transfers out of Level 3	1.7			—			—			1.7
Purchases	—			2.3			—			2.3
Settlements	4.9			0.5			—			5.4
Balance at June 30, 2014	$	(460.6	)	$	(1.7	)	$	0.6		$	(461.7	)
Nine Months Ended June 30, 2015
Balance at October 1, 2014	$	(294.7	)	$	(5.0	)	$	—		$	(299.7	)
Realized and unrealized gains (losses)
Recorded to income	(51.0		)	(15.3		)	—			(66.3		)
Recorded to regulatory assets—gas costs	(48.0		)	—			—			(48.0		)
Transfers into Level 3	5.4			—			—			5.4
Transfers out of Level 3	3.6			—			—			3.6
Purchases	—			7.3			—			7.3
Settlements	33.7			4.2			—			37.9
Balance at June 30, 2015	$	(351.0	)	$	(8.8	)	$	—		$	(359.8	)
Nine Months Ended June 30, 2014
Balance at October 1, 2013	$	(155.2	)	$	2.4		$	1.1		$	(151.7	)
Realized and unrealized gains (losses)
Recorded to income	(151.6		)	1.0			(0.5		)	(151.1		)
Recorded to regulatory assets—gas costs	(198.7		)	—			—			(198.7		)
Transfers out of Level 3	1.7			—			—			1.7
Purchases	—			3.7			—			3.7
Settlements	43.2			(8.8		)	—			34.4
Balance at June 30, 2014	$	(460.6	)	$	(1.7	)	$	0.6		$	(461.7	)

Washington Gas Light Company Reconciliation of Fair Value Measurements Using Significant Level 3 Inputs
(In millions)	Natural Gas Related Derivatives
Three Months Ended June 30, 2015
Balance at April 1, 2015	$	(299.8	)
Realized and unrealized gains (losses)
Recorded to income	(7.6		)
Recorded to regulatory assets—gas costs	(7.7		)
Transfers out of Level 3	2.8
Settlements	5.1
Balance at June 30, 2015	$	(307.2	)
Three Months Ended June 30, 2014
Balance at April 1, 2014	$	(382.6	)
Realized and unrealized gains (losses)
Recorded to income	(4.5		)
Recorded to regulatory assets—gas costs	(15.9		)
Transfers out of Level 3	1.7
Settlements	4.4
Balance at June 30, 2014	$	(396.9	)
Nine Months Ended June 30, 2015
Balance at October 1, 2014	$	(270.6	)
Realized and unrealized gains (losses)
Recorded to income	(30.3		)
Recorded to regulatory assets—gas costs	(48.0		)
Transfers into Level 3	5.4
Transfers out of Level 3	2.5
Settlements	33.8
Balance at June 30, 2015	$	(307.2	)
Nine Months Ended June 30, 2014
Balance at October 1, 2013	$	(133.6	)
Realized and unrealized gains (losses)
Recorded to income	(109.7		)
Recorded to regulatory assets—gas costs	(198.7		)
Transfers out of Level 3	1.7
Settlements	43.4
Balance at June 30, 2014	$	(396.9	)

Transfers between different levels of the fair value hierarchy may occur based on the level of observable inputs used to value the instruments from period to period. It is our policy to show both transfers into and out of the different levels of the fair value hierarchy at the fair value as of the beginning of the period. Transfers out of Level 3 during the three and nine months ended June 30, 2015 and 2014 were due to an increase in valuations using observable market inputs. Transfers into Level 3 during the nine months ended June 30, 2015 were due to an increase in unobservable market inputs used in valuations.

The table below sets forth the line items on the statements of income to which amounts are recorded for the three and nine months ended June 30, 2015 and 2014, respectively, related to fair value measurements using significant Level 3 inputs.

WGL Holdings, Inc. Realized and Unrealized Gains (Losses) Recorded to Income for Level 3 Measurements
(In millions)	Natural Gas Related Derivatives			Electricity Related Derivatives			Warrants			Total
Three Months Ended June 30, 2015
Operating revenues—non-utility	$	(22.3	)	$	(3.0	)	$	—		$	(25.3	)
Utility cost of gas	(7.6		)	—			—			(7.6		)
Non-utility cost of energy-related sales	(3.7		)	(1.8		)	—			(5.5		)
Total	$	(33.6	)	$	(4.8	)	$	—		$	(38.4	)
Three Months Ended June 30, 2014
Operating revenues—non-utility	$	(14.3	)	$	(5.6	)	$	—		$	(19.9	)
Utility cost of gas	(4.5		)	—			—			(4.5		)
Other income-net	—			—			(0.6		)	(0.6		)
Non-utility cost of energy-related sales	(0.2		)	3.3			—			3.1
Total	$	(19.0	)	$	(2.3	)	$	(0.6	)	$	(21.9	)
Nine Months Ended June 30, 2015
Operating revenues—non-utility	$	(20.7	)	$	21.0		$	—		$	0.3
Utility cost of gas	(30.3		)	—			—			(30.3		)
Non-utility cost of energy-related sales	—			(36.3		)	—			(36.3		)
Total	$	(51.0	)	$	(15.3	)	$	—		$	(66.3	)
Nine Months Ended June 30, 2014
Operating revenues—non-utility	$	(40.6	)	$	(30.1	)	$	—		$	(70.7	)
Utility cost of gas	(109.7		)	—			—			(109.7		)
Other income-net	—			—			(0.5		)	(0.5		)
Non-utility cost of energy-related sales	(1.3		)	31.1			—			29.8
Total	$	(151.6	)	$	1.0		$	(0.5	)	$	(151.1	)

Washington Gas Light Company Realized and Unrealized Gains (Losses) Recorded to Income for Level 3 Measurements
(In millions)	Natural Gas Related Derivatives
Three Months Ended June 30, 2015
Utility cost of gas	$	(7.6	)
Total	$	(7.6	)
Three Months Ended June 30, 2014
Utility cost of gas	$	(4.5	)
Total	$	(4.5	)
Nine Months Ended June 30, 2015
Utility cost of gas	$	(30.3	)
Total	$	(30.3	)
Nine Months Ended June 30, 2014
Utility cost of gas	$	(109.7	)
Total	$	(109.7	)

Unrealized gains (losses) attributable to derivative assets and liabilities measured using significant Level 3 inputs were recorded as follows, for the three and nine months ended June 30, 2015 and 2014, respectively.

WGL Holdings, Inc. Unrealized Gains (Losses) Recorded for Level 3 Measurements
(In millions)	Natural Gas Related Derivatives			Electricity Related Derivatives			Warrants			Total
Three Months Ended June 30, 2015
Recorded to income
Operating revenues—non-utility	$	(21.3	)	$	0.8		$	—		$	(20.5	)
Utility cost of gas	(1.8		)	—			—			(1.8		)
Non-utility cost of energy-related sales	(5.6		)	2.5			—			(3.1		)
Recorded to regulatory assets—gas costs	(9.2		)	—			—			(9.2		)
Total	$	(37.9	)	$	3.3		$	—		$	(34.6	)
Three Months Ended June 30, 2014
Recorded to income
Operating revenues—non-utility	$	(13.9	)	$	(5.8	)	$	—		$	(19.7	)
Utility cost of gas	(6.0		)	—			—			(6.0		)
Non-utility cost of energy-related sales	(0.1		)	5.3			—			5.2
Other income-net	—			—			(0.6		)	(0.6		)
Recorded to regulatory assets—gas costs	(17.6		)	—			—			(17.6		)
Total	$	(37.6	)	$	(0.5	)	$	(0.6	)	$	(38.7	)
Nine Months Ended June 30, 2015
Recorded to income
Operating revenues—non-utility	$	(17.6	)	$	21.7		$	—		$	4.1
Utility cost of gas	(23.1		)	—			—			(23.1		)
Non-utility cost of energy-related sales	(1.7		)	(31.5		)	—			(33.2		)
Recorded to regulatory assets—gas costs	(38.1		)	—			—			(38.1		)
Total	$	(80.5	)	$	(9.8	)	$	—		$	(90.3	)
Nine Months Ended June 30, 2014
Recorded to income
Operating revenues—non-utility	$	(44.6	)	$	(39.3	)	$	—		$	(83.9	)
Utility cost of gas	(100.4		)	—			—			(100.4		)
Non-utility cost of energy-related sales	3.3			35.8			—			39.1
Other income-net	—			—			(0.5		)	(0.5		)
Recorded to regulatory assets—gas costs	(190.7		)	—			—			(190.7		)
Total	$	(332.4	)	$	(3.5	)	$	(0.5	)	$	(336.4	)

Washington Gas Light Company Unrealized Gains (Losses) Recorded for Level 3 Measurements
(In millions)	Natural Gas Related Derivatives
Three Months Ended June 30, 2015
Recorded to income - utility cost of gas	$	(1.8	)
Recorded to regulatory assets—gas costs	(9.2		)
Total	$	(11.0	)
Three Months Ended June 30, 2014
Recorded to income - utility cost of gas	$	(6.0	)
Recorded to regulatory assets—gas costs	(17.6		)
Total	$	(23.6	)
Nine Months Ended June 30, 2015
Recorded to income - utility cost of gas	$	(23.1	)
Recorded to regulatory assets—gas costs	(38.1		)
Total	$	(61.2	)
Nine Months Ended June 30, 2014
Recorded to income - utility cost of gas	$	(100.4	)
Recorded to regulatory assets—gas costs	(190.7		)
Total	$	(291.1	)

The following table presents the carrying amounts and estimated fair values of our financial instruments at June 30, 2015 and September 30, 2014.

WGL Holdings, Inc. Fair Value of Financial Instruments
	June 30, 2015				September 30, 2014
(In millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Money market funds(a)	$	74.6	$	74.6	$	9.7	$	9.7
Other short-term investments(a)	$	1.0	$	1.0	$	—	$	—
Commercial paper (b)	$	156.0	$	156.0	$	453.5	$	453.5
Long-term debt(c)	$	950.5	$	1,033.5	$	679.2	$	809.3

Washington Gas Light Company Fair Value of Financial Instruments
	June 30, 2015				September 30, 2014
(In millions)	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Money market funds(a)	$	70.4	$	70.4	$	4.3	$	4.3
Other short-term investments(a)	$	1.0	$	1.0	$	—	$	—
Commercial paper (b)	$	—	$	—	$	89.0	$	89.0
Long-term debt(c)	$	702.2	$	795.9	$	679.2	$	809.3

^(a)  Balance is located in cash and cash equivalents in the accompanying balance sheets. These amounts may be offset by outstanding checks.

^(b)  Balance is located in notes payable in the accompanying balance sheets.

^(c)  Less current maturities and unamortized discounts.

Our money market funds are Level 1 valuations and their carrying amount approximates fair value. Other short-term investments are primarily overnight investment accounts; therefore, their carrying amount approximates fair value based on Level 2 inputs. The maturity of our commercial paper outstanding at both June 30, 2015 and September 30, 2014 is under 30 days. Due to the short term nature of these notes, the carrying cost of our commercial paper approximates fair value using Level 2 inputs. Neither WGL’s nor Washington Gas’ long-term debt is actively traded. The fair value of long-term debt was estimated based on the quoted market prices of the U.S. Treasury issues having a similar term to maturity, adjusted for the credit quality of the debt issuer, WGL or Washington Gas. Our long-term debt fair value measurement is classified as Level 3.

Non Recurring Basis

During the nine months ended June 30, 2015, Washington Gas Resources recorded an impairment charge of its investment in ASDHI to its fair value using the income approach. The amount of the impairment was equivalent to the amount of the carrying value of $5.6 million and was due to management’s assumption of the current valuation and expected return from the investment. The fair value of this investment was a Level 3 measurement.

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Other Investments

9 Months Ended

Jun. 30, 2015

Other Investments [Abstract]

Other Investments

NOTE 11. OTHER INVESTMENTS

When determining how to account for our interests in other legal entities, WGL first evaluates if we are required to apply the variable interest entity (VIE) model to the entity, otherwise the entity is evaluated under the voting interest model.

Under the VIE model, we have a controlling financial interest in a VIE (i.e. are the primary beneficiary) when we have current or potential rights that give us the power to direct the activities of a VIE that most significantly impact the VIE’s economic performance combined with a variable interest that gives us the right to receive potentially significant benefits or the obligation to absorb potentially significant losses. When changes occur to the design of an entity, we reconsider whether it is subject to the VIE model. We continuously evaluate whether we have a controlling financial interest in a VIE.

Under the voting interest model, we generally have a controlling financial interest in an entity where we currently hold, directly or indirectly, more than 50% of the voting rights or where we exercise control through substantive participating rights. However, we consider substantive rights held by other partners in determining if we hold a controlling financial interest, and in some cases, despite owning more than 50% of the common stock of an investee, an evaluation of our rights results in the determination that we do not have a controlling financial interest. We reevaluate whether we have a controlling financial interest in these entities when our voting or substantive participating rights change.

Unconsolidated affiliates are unconsolidated VIEs and other entities evaluated under the voting interest method in which we do not have a controlling financial interest, but over which we have varying degrees of influence. Where we have significant influence, the affiliates are accounted for as equity method investments. Where we do not have significant influence, the affiliates are accounted for under the cost method. Investments in, and advances to, affiliated companies are presented on a one-line basis in the caption “Investments in unconsolidated affiliates” on our Consolidated Balance Sheet.

WGL uses the Hypothetical Liquidation at Book Value (HLBV) methodology for certain equity method investments when the capital structure of the equity investment results in different liquidation rights and priorities than what is reflected by the underlying percentage ownership interests as defined by an equity investment agreement. For investments accounted for under the HLBV method, simply applying the percentage ownership interest to GAAP net income in order to determine earnings or losses does not accurately represent the income allocation and cash flow distributions that will ultimately be received by the investors. The equity investment agreements for ASD Solar, LP (ASD), Meade Pipeline Co LLC (Meade) and Mountain Valley Pipeline, LLC (Mountain Valley) have liquidation rights and priorities that are sufficiently different from the ownership percentages that the HLBV method was deemed appropriate. The calculation may vary in its complexity depending on the capital structure and the tax considerations for the investments.

WGL applies HLBV using a balance sheet approach. A calculation is prepared at each balance sheet date to determine the amount that WGL would receive if an equity investment entity were to liquidate all of its assets (as valued in accordance with GAAP) and distribute that cash to the investors based on the contractually defined liquidation priorities. The difference between the calculated liquidation distribution amounts at the beginning and the end of the reporting period is WGL’s share of the earnings or losses from the equity investment for the period.

Variable Interest Entities

WGL has a variable interest in four investments that qualify as VIEs:

• Meade,

• SunEdison,

• Nextility and

• ASD.

WGL previously had a variable interest in Crab Run; however, this investment was sold during the nine months ended June 30, 2015. Accordingly, during the nine months ended June 30, 2015, the carrying amount of the investment was removed and WGL recognized a gain of $0.7 million, which was recorded in "Equity in earnings of unconsolidated affiliates" on WGL's statements of income.

WGL and its subsidiaries are not the primary beneficiary for any of the above VIEs, therefore we have not consolidated any of the VIE entities. At June 30, 2015, the nature of WGL’s involvement with these investments lacks the characteristics of a controlling financial interest. WGL does not have control over any of the VIEs’ activities that are economically significant to the VIEs. In addition, WGL does not have the obligation to absorb expected losses or the right to receive expected gains that could be significant to the VIE.

Meade

In 2014, WGL through its subsidiary, WGL Midstream, entered into a limited liability company agreement and formed Meade, a Delaware limited liability company with COG Holdings LLC, Vega Midstream MPC LLC and River Road Interests LLC. Meade was formed to partner with Transcontinental Gas Pipeline Company, LLC (Williams) to invest in a regulated pipeline project called Central Penn Pipeline (Central Penn). The Central Penn will be an approximately 177-mile pipeline originating in Susquehanna County, Pennsylvania and extending to Lancaster County, Pennsylvania that will have the capacity to transport and deliver up to approximately 1.7 million dekatherms per day of natural gas.

WGL Midstream plans to invest an estimated $412.0 million for a 55% interest in Meade. WGL Midstream joins COG Holdings LLC (20% share), Vega Midstream MPC LLC (15% share) and River Road Interests LLC (10% share) in Meade. Meade is accounted for under the HLBV equity method of accounting, and any profits and losses are included in “Equity in earnings of unconsolidated affiliates” in the accompanying Consolidated Statement of Income and are added to or subtracted from the carrying amount of WGL’s investment balance. At June 30, 2015 and September 30, 2014, WGL Midstream held a $21.7 million and $5.8 million, respectively, equity method investment in Meade.

Our maximum financial exposure includes contributions and guarantees on behalf of WGL Midstream. Our maximum exposure to loss at June 30, 2015 was $59.4 million, which represents the minimum funding requirements owed to Williams under the Construction and Ownership Agreement should Meade terminate its agreement with Williams early.

SunEdison/Nextility

WGSW is party to two agreements to fund residential and commercial retail solar energy installations with two separate, privately held companies. WGSW has a master purchase agreement and master lease agreement with SunEdison, Inc. (SunEdison), and Nextility, Inc. (Nextility) for sale/leaseback arrangements for residential and commercial solar systems.

Our agreements with SunEdison and Nextility are accounted for as direct financing leases. WGSW records associated interest in the financing leases in “Other income (expenses)-net” line in the accompanying Consolidated Statement of Income. WGSW held a $29.1 million and $19.9 million combined investment in direct financing leases at June 30, 2015 and September 30, 2014, respectively, of which $3.3 million and $1.7 million are current receivables recorded in “Accounts Receivable” in the accompanying Consolidated Balance Sheets at June 30, 2015 and September 30, 2014, respectively.

Minimum future lease payments receivable under direct financing leases over the next five fiscal years and thereafter are as follows:

Minimum Payments Receivable for Direct Financing Leases
(In millions)
Remainder of 2015	$	2.4
2016	2.5
2017	2.4
2018	2.3
2019	2.2
Thereafter	22.6
Total	$	34.4

Minimum payments receivable exclude $7.7 million of residual values and $2.6 million in tax credits. Associated with these investments, WGSW holds $15.6 million of unearned income on its balance sheet. The initial direct costs (incurred in FY 2012) associated with these investments was $0.7 million.

Our maximum financial exposure from solar agreements is limited to WGSW's lease payment receivables and investment contributions made to these companies. All additional future committed contributions are contingent on the projects meeting required criteria. Our exposure is offset by the owned physical assets received as part of the transaction and the quick economic return for the investment through the investment tax credit/treasury grant proceeds and accelerated depreciation.

ASD

In addition to SunEdison and Nextility, WGSW is also a limited partner in ASD, a limited partnership formed to own and operate a portfolio of residential solar projects, primarily rooftop photovoltaic power generation systems. As a limited partner, WGSW provided funding to the partnership but does not have power to direct the activities that most significantly affect the operations and economic performance of the entity. In January 2014, the funding commitment period expired for the partnership. WGSW’s maximum financial exposure is limited to its contributions made to the partnership.

Our investment in ASD is accounted for under the HLBV equity method of accounting; any profits and losses are included in “Equity in earnings of unconsolidated affiliates” in the accompanying Consolidated Statement of Income and are added to or subtracted from the carrying amount of WGSW’s investment balance. At June 30, 2015 and September 30, 2014, WGSW held a $64.3 million and $66.8 million, respectively, equity method investment in ASD.

ASD is consolidated by its general partner, Solar Direct LLC. Solar Direct LLC is a wholly owned subsidiary of American Solar Direct Inc. (ASDI). At June 30, 2015, the carrying amount of WGSW’s investment in ASD exceeded the amount of the underlying equity in net assets by $35.9 million due to WGSW recording additions to its investment in ASD’s net assets at fair value of contributions in accordance with GAAP. This basis difference is being amortized over the life of the assets.

Non-VIE Investments

ASDHI

At September 30, 2014, Washington Gas Resources held a $5.6 million investment in American Solar Direct Holdings Inc. (ASDHI) consisting of warrants and preferred stock. During the nine months ended June 30, 2015, Washington Gas Resources impaired its entire investment in ASDHI by its carrying value of $5.6 million based on management’s assumption of the current valuation and expected return from the investment.

Constitution

In 2013, WGL Midstream invested in Constitution Pipeline Company, LLC (Constitution). WGL Midstream will invest an estimated aggregate amount of $79.0 million in the project for a 10% share in the pipeline venture over the term of the agreement. At June 30, 2015, WGL Midstream had invested $26.4 million in Constitution. Other investors in the project include Williams Partners L.P. (41% share), Cabot Oil and Gas Corporation (25% share) and Piedmont Natural Gas (24% share) in the project. This natural gas pipeline venture will transport natural gas from the Marcellus region in northern Pennsylvania to major northeastern markets. Constitution is accounted for under the equity method of accounting; any profits and losses are included in “Equity in earnings of unconsolidated affiliates” in the accompanying Consolidated Statement of Income and are added to or subtracted from the carrying amount of WGL’s investment balance. The equity method is considered appropriate because Constitution is an LLC with specific ownership accounts and ownership between five and fifty percent resulting in WGL Midstream maintaining a more than minor influence over the partnership operating and financing policies. WGL Midstream held a $29.5 million equity method investment in Constitution at June 30, 2015.

At June 30, 2015, the maximum financial exposure is equivalent to total capital contributions made in Constitution on behalf of WGL Midstream, which was $26.4 million.

Mountain Valley Pipeline

In March 2015, WGL Midstream acquired a 7% equity interest in Mountain Valley Pipeline, LLC (Mountain Valley).

The proposed pipeline to be developed, constructed, owned and operated by Mountain Valley, will transport approximately 2.0 million dekatherms of natural gas per day from a new interconnect with EQT Corporation's Equitrans system, near the MarkWest Mobley plant in Smithfield, West Virginia to Transcontinental Gas Pipeline Company LLC's Station 165 in Pittsylvania County, Virginia.

WGL Midstream expects to invest, in scheduled capital contributions through the in-service date of the pipeline, its pro rata share (based on its 7% equity interest) of project costs, an estimated aggregate amount of approximately $230 to $245 million. WGL Midstream held a $5.9 million equity method investment in Mountain Valley at June 30, 2015.

Our maximum financial exposure includes guarantees on behalf of WGL Midstream and another partner in the venture. WGL's maximum exposure to loss due to the provided guarantees was $20.0 million at June 30, 2015 which represents a $14.0 million minimum funding requirement for WGL Midstream and the guarantee on behalf of one of the other partners.

In addition, WGL Midstream entered into an agreement to finance future capital commitments of one of the other partners in the venture for an estimated aggregate amount of approximately $96 to $105 million, which represents the estimated total funding requirements for that partner's 3% ownership interest in the joint venture, inclusive of the minimum funding requirement. WGL Midstream has provided funding of $2.5 million as of June 30, 2015 related to this agreement.

The balance sheet location of the investments discussed in this footnote at June 30, 2015 and September 30, 2014 are as follows:

WGL Holdings, Inc. Balance Sheet Location of Other Investments
As of June 30, 2015 (in millions)	VIEs		Non-VIEs			Total
Assets
Investments in unconsolidated affiliates	$	85.9	$	35.4		$	121.3
Investments in direct financing leases, capital leases	25.8		—			25.8
Accounts receivable	3.3		2.5		(a)	5.8
Total assets	$	115.0	$	37.9		$	152.9
As of September 30, 2014 (in millions)
Assets
Investments in unconsolidated affiliates	$	72.6	$	27.9		$	100.5
Investments in direct financing leases, capital leases	18.2		—			18.2
Accounts receivable	1.7		—			1.7
Total assets	$	92.5	$	27.9		$	120.4

^(a) Represents the financing provided to another partner in Mountain Valley to fund its capital commitment. Acquired ownership interest represents the collateral for repayment of the financing.

The income statement location of the investments discussed in this footnote for the three and nine months ended June 30, 2015 and 2014 are as follows:

WGL Holdings, Inc. Income Statement Location of Other Investments
(In millions)	VIEs		Non-VIEs		Total		VIEs		Non-VIEs			Total
	Three Months Ended   June 30, 2015						Nine Months Ended   June 30, 2015
Equity in earnings of unconsolidated affiliates	$	0.8	$	0.5	$	1.3	$	2.4	$	1.8		$	4.2
Depreciation and amortization	0.1		—		0.1		0.2		—			0.2
Other income (expenses)—net	1.0		—		1.0		2.4		(5.6		)	(3.2		)
Net income	$	1.7	$	0.5	$	2.2	$	4.6	$	(3.8	)	$	0.8
	Three Months Ended   June 30, 2014						Nine Months Ended   June 30, 2014
Equity in earnings of unconsolidated affiliates	$	0.5	$	0.3	$	0.8	$	1.3	$	0.6		$	1.9
Depreciation and amortization	—		—		—		0.1		—			0.1
Other income—net	0.6		—		0.6		1.9		—			1.9
Net income	$	1.1	$	0.3	$	1.4	$	3.1	$	0.6		$	3.7

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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands		3 Months Ended			9 Months Ended
		Jun. 30, 2015		Jun. 30, 2014	Jun. 30, 2015		Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance		$ (11,643)		$ (10,969)	$ (7,961)		$ (11,048)
Qualified cash flow hedging instruments	[1]	49		0	(7,994)		0
Change in prior service cost (credit)	[2]	(170)		6,204	(511)		6,135
Change in actuarial net loss	[2]	529		404	1,503		604
Current-period other comprehensive income		408		6,608	(7,002)		6,739
Income tax expense (benefit) related to other comprehensive income (loss)		163		2,622	(3,565)		2,674
Ending Balance		(11,398)		(6,983)	(11,398)		(6,983)
Washington Gas Light Company
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance		(6,031)		(10,969)	(6,413)		(11,048)
Change in prior service cost (credit)	[3]	(170)	[2]	6,204	(511)	[2]	6,135
Change in actuarial net loss	[3]	529	[2]	404	1,503	[2]	604
Current-period other comprehensive income		359		6,608	992		6,739
Income tax expense (benefit) related to other comprehensive income (loss)		143		2,622	394		2,674
Ending Balance		$ (5,815)		$ (6,983)	$ (5,815)		$ (6,983)

[1] Cash flow hedging instruments represent interest rate swaps agreements on debt issuances. Refer to Note 8- Derivative and weather-related instruments for further discussion of the interest rate swap agreements.

[2] These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost. Refer to Note 14- Pension and other post-retirement benefit plans for additional details.

[3] These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost. Refer to Note 14-Pension and other post-retirement benefit plans for additional details.

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Pension and Other Post-Retirement Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 3.9	$ 3.5	$ 11.6	$ 10.5
Interest cost	9.7	10.1	29.3	30.3
Expected return on plan assets	(11.2)	(10.2)	(33.5)	(30.7)
Amortization of prior service cost (credit)	0.1	0.1	0.2	0.2
Amortization of actuarial loss	4.7	4.2	14.1	12.6
Net periodic benefit cost	7.2	7.7	21.7	22.9
Amount allocated to construction projects	(1.2)	(1.1)	(3.4)	(3.1)
Amortization of regulatory asset (liability)-net	1.8	1.7	5.3	5.3
Amount charged (credited) to expense	7.8	8.3	23.6	25.1
Health and Life Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	1.8	1.6	5.3	5.9
Interest cost	3.7	3.8	11.0	14.8
Expected return on plan assets	(5.2)	(4.9)	(15.6)	(14.4)
Amortization of prior service cost (credit)	(3.8)	(3.8)	(11.4)	(5.8)
Amortization of actuarial loss	1.1	1.6	3.3	3.5
Net periodic benefit cost	(2.4)	(1.7)	(7.4)	4.0
Amount allocated to construction projects	0.5	0.1	1.5	(0.7)
Amortization of regulatory asset (liability)-net	(0.1)	0.2	(0.2)	0.4
Amount charged (credited) to expense	$ (2.0)	$ (1.4)	$ (6.1)	$ 3.7

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Pension and Other Post-Retirement Benefit Plan (Tables)

9 Months Ended

Jun. 30, 2015

Pension and Other Postretirement Benefit Expense [Abstract]

Components of Net Periodic Benefit Costs (Income)

The following table shows the components of net periodic benefit costs (income) recognized in our financial statements during the three and nine months ended June 30, 2015 and 2014.

Components of Net Periodic Benefit Costs (Income)
	Three Months Ended June 30,
	2015						2014
(In millions)	Pension Benefits			Health and Life Benefits			Pension Benefits			Health and Life Benefits
Service cost	$	3.9		$	1.8		$	3.5		$	1.6
Interest cost	9.7			3.7			10.1			3.8
Expected return on plan assets	(11.2		)	(5.2		)	(10.2		)	(4.9		)
Amortization of prior service cost (credit)	0.1			(3.8		)	0.1			(3.8		)
Amortization of actuarial loss	4.7			1.1			4.2			1.6
Net periodic benefit cost (income)	7.2			(2.4		)	7.7			(1.7		)
Amount allocated to construction projects	(1.2		)	0.5			(1.1		)	0.1
Amortization of regulatory asset/liability—net	1.8			(0.1		)	1.7			0.2
Amount charged (credited) to expense	$	7.8		$	(2.0	)	$	8.3		$	(1.4	)
	Nine Months Ended June 30,
	2015						2014
Service cost	$	11.6		$	5.3		$	10.5		$	5.9
Interest cost	29.3			11.0			30.3			14.8
Expected return on plan assets	(33.5		)	(15.6		)	(30.7		)	(14.4		)
Amortization of prior service cost (credit)	0.2			(11.4		)	0.2			(5.8		)
Amortization of actuarial loss	14.1			3.3			12.6			3.5
Net periodic benefit cost (income)	21.7			(7.4		)	22.9			4.0
Amount allocated to construction projects	(3.4		)	1.5			(3.1		)	(0.7		)
Amortization of regulatory asset/liability—net	5.3			(0.2		)	5.3			0.4
Amount charged (credited) to expense	$	23.6		$	(6.1	)	$	25.1		$	3.7

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Fair Value Measurements (Carrying Amounts and Estimated Fair Value) (Details) - USD ($) $ in Thousands		Jun. 30, 2015	Sep. 30, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commercial Paper		$ 156,000	$ 453,500
Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Money Market Funds	[1]	74,600	9,700
Other Short-term Investments	[1]	1,000	0
Commercial Paper	[2]	156,000	453,500
Long-term debt	[3]	950,500	679,200
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Money Market Funds	[1]	74,600	9,700
Other Short-term Investments	[1]	1,000	0
Commercial Paper	[2]	156,000	453,500
Long-term debt	[3]	1,033,500	809,300
Washington Gas Light Company
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Commercial Paper		0	89,000
Washington Gas Light Company | Carrying Amount
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Money Market Funds	[1]	70,400	4,300
Other Short-term Investments	[1]	1,000	0
Commercial Paper	[2]	0	89,000
Long-term debt	[3]	702,200	679,200
Washington Gas Light Company | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Money Market Funds	[1]	70,400	4,300
Other Short-term Investments	[1]	1,000	0
Commercial Paper	[2]	0	89,000
Long-term debt	[3]	$ 795,900	$ 809,300

[1] Balance is located in cash and cash equivalents in the accompanying balance sheets. These amounts may be offset by outstanding checks.

[2] Balance is located in notes payable in the accompanying balance sheets.

[3] Less current maturities and unamortized discounts.

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Accounting Policies (Policies)

9 Months Ended

Jun. 30, 2015

Accounting Policies [Abstract]

Basis of Presentation

Basis of Presentation

WGL Holdings, Inc. (WGL) is a holding company that owns all of the shares of common stock of Washington Gas Light Company (Washington Gas), a regulated natural gas utility, all of the shares of common stock of Washington Gas Resources Corporation (Washington Gas Resources) and Hampshire Gas Company (Hampshire). Washington Gas Resources owns all of the shares of common stock of four non-utility subsidiaries that include WGL Energy Services, Inc. (WGL Energy Services), WGL Energy Systems, Inc. (WGL Energy Systems), WGL Midstream, Inc. (WGL Midstream) and WGSW, Inc. (WGSW). Except where the content clearly indicates otherwise, “WGL,” “we,” “us” or “our” refers to the holding company or the consolidated entity of WGL Holdings, Inc. and all of its subsidiaries. Unless otherwise noted, these notes apply equally to WGL and Washington Gas.

The condensed consolidated financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission (SEC). Therefore, certain financial information and note disclosures accompanying annual financial statements prepared in accordance with generally accepted accounting principles in the United States of America (GAAP) are omitted in this interim report. The interim consolidated financial statements and accompanying notes should be read in conjunction with the combined Annual Report on Form 10-K for WGL and Washington Gas for the fiscal year ended September 30, 2014. Due to the seasonal nature of our businesses, the results of operations for the periods presented in this report are not necessarily indicative of actual results for the full fiscal years ending September 30, 2015 and 2014 of either WGL or Washington Gas.

The accompanying unaudited financial statements for WGL and Washington Gas reflect all normal recurring adjustments that are necessary, in our opinion, to present fairly the results of operations in accordance with GAAP.

For a complete description of our accounting policies, refer to Note 1 of the Notes to Consolidated Financial Statements of the combined Annual Report on Form 10-K for WGL and Washington Gas for the fiscal year ended September 30, 2014.

Assets Held for Sale

Assets Held for Sale

At June 30, 2015, the Springfield Operations Center met the criteria to be reported as held for sale. Among other things, those criteria specify that (a) the asset must be available for immediate sale in its present condition subject only to terms that are usual and customary for sales of such assets and (b) the sale of the asset must be probable, and its transfer expected to qualify for recognition as a completed sale, within one year, with certain exceptions. The assets and liabilities associated with the Springfield Operations Center were reported as "Assets held for sale" and "Liabilities held for sale" on WGL's and Washington Gas' balance sheets as of June 30, 2015.

Storage Gas Valuation Methods

Storage Gas Valuations

For Washington Gas and WGL Energy Services, storage gas inventories are stated at the lower-of-cost or market as determined using the first-in, first-out method. For WGL Midstream, storage gas inventory is stated at the lower-of-cost or market using the weighted average cost method. Interim period inventory losses attributable to lower-of-cost or market adjustments may be reversed if the market value of the inventory is recovered by the end of the same fiscal year.

Accounting Standards Adopted Current Period

ACCOUNTING STANDARDS ADOPTED IN FISCAL YEAR 2015

ASU 2013-11, Presentation of an Unrecognized Tax Benefit When a Net Operating Loss Carryforward, a Similar Tax Loss, or a Tax Credit Carryforward Exists (Topic 740)

The standard requires an unrecognized tax benefit, or a portion of an unrecognized tax benefit to be presented in the financial statements as a reduction to a deferred tax asset for net operating loss carryforwards, a similar loss, or a tax

credit carryforward.

October 1, 2014

As a result of the implementation of this standard, we reduced our deferred tax assets by a portion of our unrecognized tax benefits. The adoption of this standard did not have a material effect on our financial statements.

New Accounting Pronouncements

OTHER NEWLY ISSUED ACCOUNTING STANDARDS

ASU 2015-03, Simplifying the Presentation of Debt Issuance Cost (Topic 835)

The standard requires an entity to present debt issuance costs in the balance sheet as a direct deduction of the debt liability in a manner consistent with its accounting treatment of debt discounts.

October 1, 2016

We are in the process of evaluating the impact the adoption of this standard will have on our financial statements.

ASU 2015-02, Consolidation (Topic 810): Amendments to the Consolidation Analysis

The standard changes the analysis to be performed in determining whether certain types of legal entities should be consolidated, specifically the analysis of limited partnerships and similar entities, fee arrangements and related party relationships.

October 1, 2016

We are in the process of evaluating the impact the adoption of this standard will have on our financial statements.

ASU 2014-09, Revenue from Contracts with Customers (Topic 606)

The standard establishes a comprehensive revenue recognition model clarifying the method used to determine the timing and requirements for revenue recognition from contracts with customers. The disclosure requirements under the new standard will enable users of financial statements to understand the nature, amount, timing, and uncertainty of revenue and cash flows arising from contracts with customers.

October 1, 2018

We are in the process of evaluating the impact the adoption of this standard will have on our financial statements.

Income Tax Policy

Under ASC Topic 740, Income Taxes, Washington Gas recognizes any accrued interest associated with uncertain tax positions in interest expense and recognizes any accrued penalties associated with uncertain tax positions in other expenses in the statements of income.

Derivatives, Reporting Of Derivative Activity

Managing Price Risk. To manage price risk associated with acquiring natural gas supply for utility customers, Washington Gas enters into forward contracts, option contracts, financial contracts and other contracts, as authorized by its regulators. These instruments are accounted for as derivative instruments. Any gains and losses associated with these derivatives are recorded as regulatory liabilities or assets, respectively, to reflect the rate treatment for these economic hedging activities.

Managing Interest-Rate Risk. Washington Gas utilizes derivative instruments that are designed to minimize the risk of interest-rate volatility associated with planned issuances of debt securities. Any gains and losses associated with these types of derivatives are recorded as regulatory liabilities or assets, respectively, and amortized in accordance with regulatory requirements, typically over the life of the newly issued debt.

Non-Utility Operations

Asset Optimization. WGL Midstream enters into derivative contracts for the purpose of optimizing its storage and transportation capacity as well as managing the transportation and storage assets on behalf of third parties. WGL Midstream does not designate these derivatives as hedges under ASC Topic 815; therefore, changes in the fair value of these derivative instruments are reflected in the earnings of our non-utility operations and may cause significant period-to-period volatility in earnings. The storage and transportation capacities utilized by WGL Midstream are not considered to be derivative instruments, and thus they are not recorded at fair value on our consolidated balance sheets.

Managing Price Risk. WGL Energy Services enters into certain derivative contracts as part of managing the price risk associated with the sale and purchase of natural gas and electricity. WGL Energy Services designates a portion of these physical contracts related to the purchase of natural gas and electricity to serve our customers as "normal purchases and normal sales" and therefore, they are not subject to the fair value accounting requirements of ASC Topic 815. Derivative instruments not designated as "normal purchases and normal sales" are recorded at fair value on our consolidated balance sheets, and changes in the fair value of these derivative instruments are reflected in the earnings of our non-utility operations, which may cause significant period-to-period volatility in earnings. WGL Energy Services does not designate derivatives as hedges under ASC Topic 815.

Managing Interest-Rate Risk. WGL utilizes derivative instruments that are designed to minimize the risk of interest-rate volatility associated with future debt issuances. WGL elected cash flow hedge accounting for its interest rate derivative instruments, which settled with the issuance of the related debt issuance in the first quarter of 2015. The effective portion of the gains and losses on the hedge were recorded within other comprehensive income and are being amortized over the life of the debt (through 2044).

Regulated Utility Operations

Washington Gas enters into contracts that qualify as derivative instruments and are accounted for under ASC Topic 815. These derivative instruments are recorded at fair value on our balance sheet and Washington Gas does not designate any derivatives as hedges under ASC Topic 815.

Asset Optimization. Washington Gas optimizes the value of its long-term natural gas transportation and storage capacity resources during periods when these resources are not being used to physically serve utility customers. Specifically, Washington Gas utilizes its transportation capacity assets to benefit from favorable natural gas prices between different geographic locations and utilizes its storage capacity assets to benefit from favorable natural gas prices between different time periods. As part of this asset optimization program, Washington Gas enters into physical and financial derivative transactions in the form of forward, futures and option contracts with the primary objective of locking in operating margins that Washington Gas will ultimately realize. The derivatives used under this program are subject to mark-to-market accounting treatment while the capacity and transportation resources are not.

Regulatory sharing mechanisms allow the profit from these transactions to be shared between Washington Gas’ shareholders and customers; therefore, any changes in fair value are recorded through earnings, or as regulatory assets or liabilities to the extent that gains and losses associated with these derivative instruments will be included in the rates charged to customers when they are realized. Valuation changes for the portion of net profits to be retained for shareholders may cause significant period-to-period volatility in earnings from unrealized gains and losses. This volatility does not change the locked-in operating margins that Washington Gas expects to ultimately realize from these transactions through the use of its storage and transportation capacity resources.

All physically and financially settled contracts under our asset optimization program are reported on a net basis in the statements of income in “Utility cost of gas.”

Collateral

WGL utilizes standardized master netting agreements, which facilitate the netting of cash flows into a single net exposure for a given counterparty. As part of these master netting agreements, cash, letters of credit and parental guarantees may be required to be posted or obtained from counterparties in order to mitigate credit risk related to both derivatives and non-derivative positions. Under WGL’s offsetting policy, collateral balances are offset against the related counterparties’ derivative positions to the extent the application would not result in the over-collateralization of those derivative positions on the balance sheet.

Any collateral posted that is not offset against open and settled derivative contracts is included in “Other prepayments” in the accompanying balance sheet. Collateral received and not offset against open and settled derivative contracts is included in “Customer deposits and advance payments” in the accompanying balance sheet.

Fair Value Measurement Policy

Our money market funds are Level 1 valuations and their carrying amount approximates fair value. Other short-term investments are primarily overnight investment accounts; therefore, their carrying amount approximates fair value based on Level 2 inputs. The maturity of our commercial paper outstanding at both June 30, 2015 and September 30, 2014 is under 30 days. Due to the short term nature of these notes, the carrying cost of our commercial paper approximates fair value using Level 2 inputs. Neither WGL’s nor Washington Gas’ long-term debt is actively traded. The fair value of long-term debt was estimated based on the quoted market prices of the U.S. Treasury issues having a similar term to maturity, adjusted for the credit quality of the debt issuer, WGL or Washington Gas. Our long-term debt fair value measurement is classified as Level 3.

Non Recurring Basis

During the nine months ended June 30, 2015, Washington Gas Resources recorded an impairment charge of its investment in ASDHI to its fair value using the income approach. The amount of the impairment was equivalent to the amount of the carrying value of $5.6 million and was due to management’s assumption of the current valuation and expected return from the investment. The fair value of this investment was a Level 3 measurement.

We measure the fair value of our financial assets and liabilities using a combination of the income and market approach in accordance with ASC Topic 820. These financial assets and liabilities primarily consist of derivatives recorded on our balance sheet under ASC Topic 815 and short-term investments, commercial paper and long-term debt outstanding required to be disclosed at fair value. Under ASC Topic 820, fair value is defined as the exit price, representing the amount that would be received in the sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. To value our financial instruments, we use market data or assumptions that market participants would use, including assumptions about credit risk (both our own credit risk and the counterparty’s credit risk) and the risks inherent in the inputs to valuation.

We enter into derivative contracts in the futures and over-the-counter (OTC) wholesale and retail markets. These markets are the principal markets for the respective wholesale and retail contracts. Our relevant market participants are our existing counterparties and others who have participated in energy transactions at our delivery points. These participants have access to the same market data as WGL. We value our derivative contracts based on an “in-exchange” premise, and valuations are generally based on pricing service data or indicative broker quotes depending on the market location. We measure the net credit exposure at the counterparty level where the right to set-off exists. The net exposure is determined using the mark-to-market exposure adjusted for collateral, letters of credit and parent guarantees. We use published default rates from Standard & Poor’s Ratings Services and Moody’s Investors Service as inputs for determining credit adjustments.

Segment Reporting Policy

We have four reportable operating segments: regulated utility, retail energy-marketing, commercial energy systems and midstream energy services. The division of these segments into separate revenue generating components is based upon regulation, products and services. Our chief operating decision maker is our Chief Executive Officer. During the first quarter of 2015, our chief operating decision maker began evaluating segment performance based on Earnings Before Interest and Taxes (EBIT). EBIT is defined as earnings before interest and taxes from continuing operations. Items we do not include in EBIT are interest expense, intercompany financing activity, dividends on Washington Gas preferred stock, and income taxes. EBIT includes transactions between reportable segments. We also evaluate our operating segments based on other relevant factors, such as penetration into their respective markets and return on equity.

Investment Policy

When determining how to account for our interests in other legal entities, WGL first evaluates if we are required to apply the variable interest entity (VIE) model to the entity, otherwise the entity is evaluated under the voting interest model.

Under the VIE model, we have a controlling financial interest in a VIE (i.e. are the primary beneficiary) when we have current or potential rights that give us the power to direct the activities of a VIE that most significantly impact the VIE’s economic performance combined with a variable interest that gives us the right to receive potentially significant benefits or the obligation to absorb potentially significant losses. When changes occur to the design of an entity, we reconsider whether it is subject to the VIE model. We continuously evaluate whether we have a controlling financial interest in a VIE.

Under the voting interest model, we generally have a controlling financial interest in an entity where we currently hold, directly or indirectly, more than 50% of the voting rights or where we exercise control through substantive participating rights. However, we consider substantive rights held by other partners in determining if we hold a controlling financial interest, and in some cases, despite owning more than 50% of the common stock of an investee, an evaluation of our rights results in the determination that we do not have a controlling financial interest. We reevaluate whether we have a controlling financial interest in these entities when our voting or substantive participating rights change.

Unconsolidated affiliates are unconsolidated VIEs and other entities evaluated under the voting interest method in which we do not have a controlling financial interest, but over which we have varying degrees of influence. Where we have significant influence, the affiliates are accounted for as equity method investments. Where we do not have significant influence, the affiliates are accounted for under the cost method. Investments in, and advances to, affiliated companies are presented on a one-line basis in the caption “Investments in unconsolidated affiliates” on our Consolidated Balance Sheet.

WGL uses the Hypothetical Liquidation at Book Value (HLBV) methodology for certain equity method investments when the capital structure of the equity investment results in different liquidation rights and priorities than what is reflected by the underlying percentage ownership interests as defined by an equity investment agreement. For investments accounted for under the HLBV method, simply applying the percentage ownership interest to GAAP net income in order to determine earnings or losses does not accurately represent the income allocation and cash flow distributions that will ultimately be received by the investors. The equity investment agreements for ASD Solar, LP (ASD), Meade Pipeline Co LLC (Meade) and Mountain Valley Pipeline, LLC (Mountain Valley) have liquidation rights and priorities that are sufficiently different from the ownership percentages that the HLBV method was deemed appropriate. The calculation may vary in its complexity depending on the capital structure and the tax considerations for the investments.

WGL applies HLBV using a balance sheet approach. A calculation is prepared at each balance sheet date to determine the amount that WGL would receive if an equity investment entity were to liquidate all of its assets (as valued in accordance with GAAP) and distribute that cash to the investors based on the contractually defined liquidation priorities. The difference between the calculated liquidation distribution amounts at the beginning and the end of the reporting period is WGL’s share of the earnings or losses from the equity investment for the period.

Our investment in ASD is accounted for under the HLBV equity method of accounting; any profits and losses are included in “Equity in earnings of unconsolidated affiliates” in the accompanying Consolidated Statement of Income and are added to or subtracted from the carrying amount of WGSW’s investment balance.

Our agreements with SunEdison and Nextility are accounted for as direct financing leases. WGSW records associated interest in the financing leases in “Other income (expenses)-net” line in the accompanying Consolidated Statement of Income.

Meade is accounted for under the HLBV equity method of accounting, and any profits and losses are included in “Equity in earnings of unconsolidated affiliates” in the accompanying Consolidated Statement of Income and are added to or subtracted from the carrying amount of WGL’s investment balance.

Constitution is accounted for under the equity method of accounting; any profits and losses are included in “Equity in earnings of unconsolidated affiliates” in the accompanying Consolidated Statement of Income and are added to or subtracted from the carrying amount of WGL’s investment balance. The equity method is considered appropriate because Constitution is an LLC with specific ownership accounts and ownership between five and fifty percent resulting in WGL Midstream maintaining a more than minor influence over the partnership operating and financing policies.

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Common Shareholders' Equity (Tables)

9 Months Ended

Jun. 30, 2015

Schedule of Capitalization, Equity [Line Items]

Components of Common Shareholders' Equity

The tables below reflect the components of “Common shareholders’ equity” for WGL and “Common shareholder’s equity” for Washington Gas for the nine months ended June 30, 2015.

WGL Holdings, Inc. Components of Common Shareholders’ Equity
(In thousands)	Common Stock Amount			Paid-In Capital		Retained Earnings			Accumulated Other Comprehensive Loss, Net of Taxes			Total
Balance at September 30, 2014	$	525,932		$	11,847	$	716,758		$	(7,961	)	$	1,246,576
Net income	—			—		130,643			—			130,643
Other comprehensive loss	—			—		—			(3,437		)	(3,437		)
Repurchase of common stock	(41,485		)	—		—			—			(41,485		)
Stock-based compensation	1,009			1,934		—			—			2,943
Dividends declared:
Common stock	—			—		(67,877		)	—			(67,877		)
Preferred stock	—			—		(990		)	—			(990		)
Balance at June 30, 2015	$	485,456		$	13,781	$	778,534		$	(11,398	)	$	1,266,373

Washington Gas Light Company

Schedule of Capitalization, Equity [Line Items]

Components of Common Shareholders' Equity

Washington Gas Light Company Components of Common Shareholder’s Equity
(In thousands)	Common Stock Amount		Paid-In Capital		Retained Earnings			Accumulated Other Comprehensive Income (Loss), Net of Taxes			Total
Balance at September 30, 2014	$	46,479	$	480,620	$	529,480		$	(6,413	)	$	1,050,166
Net income	—		—		128,221			—			128,221
Other comprehensive income	—		—		—			598			598
Stock-based compensation	—		1,773		—			—			1,773
Dividends declared:
Common stock	—		—		(59,051		)	—			(59,051		)
Preferred stock	—		—		(990		)	—			(990		)
Balance at June 30, 2015	$	46,479	$	482,393	$	597,660		$	(5,815	)	$	1,120,717

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Fair Value Measurements (Reconciliation with Level 3 Inputs) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance	$ (330.1)	$ (433.3)	$ (299.7)	$ (151.7)
Recorded to income	(38.4)	(21.9)	(66.3)	(151.1)
Recorded to regulatory assets—gas costs	(7.7)	(15.9)	(48.0)	(198.7)
Transfers into Level 3			5.4
Transfers out of Level 3	3.9	1.7	3.6	1.7
Purchases	3.9	2.3	7.3	3.7
Settlements	8.6	5.4	37.9	34.4
Ending balance	(359.8)	(461.7)	(359.8)	(461.7)
Natural Gas Related Derivatives
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance	(319.6)	(432.3)	(294.7)	(155.2)
Recorded to income	(33.6)	(19.0)	(51.0)	(151.6)
Recorded to regulatory assets—gas costs	(7.7)	(15.9)	(48.0)	(198.7)
Transfers into Level 3			5.4
Transfers out of Level 3	3.9	1.7	3.6	1.7
Purchases	0.0	0.0	0.0	0.0
Settlements	6.0	4.9	33.7	43.2
Ending balance	(351.0)	(460.6)	(351.0)	(460.6)
Electricity Related Derivatives
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance	(10.5)	(2.2)	(5.0)	2.4
Recorded to income	(4.8)	(2.3)	(15.3)	1.0
Recorded to regulatory assets—gas costs	0.0	0.0	0.0	0.0
Transfers into Level 3			0.0
Transfers out of Level 3	0.0	0.0	0.0	0.0
Purchases	3.9	2.3	7.3	3.7
Settlements	2.6	0.5	4.2	(8.8)
Ending balance	(8.8)	(1.7)	(8.8)	(1.7)
Warrant
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance	0.0	1.2	0.0	1.1
Recorded to income	0.0	(0.6)	0.0	(0.5)
Recorded to regulatory assets—gas costs	0.0	0.0	0.0	0.0
Transfers into Level 3			0.0
Transfers out of Level 3	0.0	0.0	0.0	0.0
Purchases	0.0	0.0	0.0	0.0
Settlements	0.0	0.0	0.0	0.0
Ending balance	0.0	0.6	0.0	0.6
Washington Gas Light Company | Natural Gas Related Derivatives
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Beginning balance	(299.8)	(382.6)	(270.6)	(133.6)
Recorded to income	(7.6)	(4.5)	(30.3)	(109.7)
Recorded to regulatory assets—gas costs	(7.7)	(15.9)	(48.0)	(198.7)
Transfers into Level 3			5.4
Transfers out of Level 3	2.8	1.7	2.5	1.7
Settlements	5.1	4.4	33.8	43.4
Ending balance	$ (307.2)	$ (396.9)	$ (307.2)	$ (396.9)

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Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Schedule of Earnings Per Share, Basic and Diluted [Line Items]
Net Income (Loss) applicable to common stock	$ (15,690)	$ (11,940)	$ 129,653	$ 67,902
Basic EPS (in shares)	49,729,000	51,921,000	49,814,000	51,871,000
Stock-based compensation plans (in shares)	0	0	242,000	14,000
Diluted EPS (in shares)	49,729,000	51,921,000	50,056,000	51,885,000
Basic EPS (in dollars per share)	$ (0.32)	$ (0.23)	$ 2.60	$ 1.31
Diluted EPS (in dollars per share)	$ (0.32)	$ (0.23)	$ 2.59	$ 1.31
Antidilutive securities excluded from computation of earnings per share			0	0
Performance Shares
Schedule of Earnings Per Share, Basic and Diluted [Line Items]
Antidilutive securities excluded from computation of earnings per share	317,000
Weighted Average Stock Option
Schedule of Earnings Per Share, Basic and Diluted [Line Items]
Antidilutive securities excluded from computation of earnings per share		5,000
Dividend Reinvestment
Schedule of Earnings Per Share, Basic and Diluted [Line Items]
Antidilutive securities excluded from computation of earnings per share		2,000

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Condensed Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
OPERATING ACTIVITIES
Net income	$ 130,643	$ 68,892
ADJUSTMENTS TO RECONCILE NET INCOME TO NET CASH PROVIDED BY OPERATING ACTIVITIES
Depreciation and Amortization	90,159	81,516
Amortization of:
Other regulatory assets and liabilities—net	981	461
Debt related costs	911	843
Deferred income taxes—net	36,156	(37,009)
Accrued/deferred pension and other post-retirement benefit cost	20,091	27,056
Compensation expense related to stock-based awards	11,051	3,838
Provision for doubtful accounts	15,411	4,474
Impairment loss	5,625	2,760
Other non-cash charges (credits)—net	(617)	5,366
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable and unbilled revenues—net	(83,076)	(88,899)
Gas costs and other regulatory assets/liabilities—net	5,025	7,369
Storage gas	186,096	108,792
Prepaid taxes	56,818	6,519
Other prepayments	(3,879)	(7,903)
Accounts payable and other accrued liabilities	(17,877)	38,124
Wages payable	(1,089)	(1,179)
Customer deposits and advance payments	5,013	(11,562)
Unamortized investment tax credits	17,162	34,360
Accrued taxes	23,240	4,282
Accrued interest	10,166	7,844
Other current assets	3,609	10,389
Other current liabilities	10,354	813
Deferred gas costs—net	11,954	(150,552)
Deferred assets—other	(17,953)	1,673
Deferred liabilities—other	(65,401)	9,944
Derivatives	62,784	314,774
Other—net	(360)	(27)
Net Cash Provided by Operating Activities	512,997	442,958
FINANCING ACTIVITIES
Long-term debt issued	296,481	75,253
Long-term debt retired	0	(37,000)
Debt issuance costs	(2,744)	0
Notes payable issued (retired) —net	(297,500)	(135,600)
Dividends on common stock and preferred stock	(67,986)	(67,367)
Repurchase of common stock	(41,485)	0
Net Cash Used in Financing Activities	(113,234)	(164,714)
INVESTING ACTIVITIES
Capital expenditures (excluding AFUDC)	(317,043)	(241,450)
Investments in non-utility interests	(29,618)	(29,666)
Distributions from non-utility interests	4,138	2,315
Net Cash Used in Investing Activities	(342,523)	(268,801)
INCREASE IN CASH AND CASH EQUIVALENTS	57,240	9,443
Cash and Cash Equivalents at Beginning of Year	8,811	3,478
Cash and Cash Equivalents at End of Period	66,051	12,921
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Income taxes paid—net	4,604	14,240
Interest paid	27,822	19,620
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING ACTIVITIES
Project debt financing activities—net	(2,032)	253
Capital expenditure accruals included in accounts payable and other accrued liabilities	30,489	21,400
Dividends paid in common stock	0	3,967
Washington Gas Light Company
OPERATING ACTIVITIES
Net income	128,221	88,122
ADJUSTMENTS TO RECONCILE NET INCOME TO NET CASH PROVIDED BY OPERATING ACTIVITIES
Depreciation and Amortization	80,832	75,942
Amortization of:
Other regulatory assets and liabilities—net	981	461
Debt related costs	967	843
Deferred income taxes—net	28,568	(36,003)
Accrued/deferred pension and other post-retirement benefit cost	19,610	26,740
Compensation expense related to stock-based awards	12,518	2,597
Provision for doubtful accounts	10,520	2,914
Impairment loss	0	2,760
Other non-cash charges (credits)—net	2,344	1,959
CHANGES IN ASSETS AND LIABILITIES
Accounts receivable and unbilled revenues—net	(50,035)	(94,146)
Gas costs and other regulatory assets/liabilities—net	5,025	7,369
Storage gas	95,735	25,850
Other prepayments	12,513	1,422
Accounts payable and other accrued liabilities	(18,939)	47,973
Wages payable	(807)	(1,133)
Customer deposits and advance payments	4,766	(11,562)
Accrued taxes	32,999	56,033
Accrued interest	8,641	7,844
Other current assets	3,980	3,626
Other current liabilities	452	10,798
Deferred gas costs—net	11,954	(150,552)
Deferred assets—other	(17,430)	1,695
Deferred liabilities—other	(9,013)	(9,192)
Derivatives	29,104	274,373
Other—net	(835)	(226)
Net Cash Provided by Operating Activities	392,671	336,507
FINANCING ACTIVITIES
Long-term debt issued	50,000	75,253
Long-term debt retired	0	(37,000)
Debt issuance costs	(722)	0
Notes payable issued (retired) —net	(89,000)	(124,500)
Dividends on common stock and preferred stock	(59,542)	(59,208)
Net Cash Used in Financing Activities	(99,264)	(145,455)
INVESTING ACTIVITIES
Capital expenditures (excluding AFUDC)	(232,697)	(180,195)
Net Cash Used in Investing Activities	(232,697)	(180,195)
INCREASE IN CASH AND CASH EQUIVALENTS	60,710	10,857
Cash and Cash Equivalents at Beginning of Year	1,060	0
Cash and Cash Equivalents at End of Period	61,770	10,857
SUPPLEMENTAL DISCLOSURES OF CASH FLOW INFORMATION
Income taxes paid—net	3,711	11,536
Interest paid	20,583	19,294
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING ACTIVITIES
Project debt financing activities—net	(2,032)	253
Capital expenditure accruals included in accounts payable and other accrued liabilities	$ 25,367	$ 13,865

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Common Shareholders' Equity

9 Months Ended

Jun. 30, 2015

Equity [Abstract]

Common Shareholders' Equity

NOTE 5. COMMON SHAREHOLDERS’ EQUITY

The tables below reflect the components of “Common shareholders’ equity” for WGL and “Common shareholder’s equity” for Washington Gas for the nine months ended June 30, 2015.

WGL Holdings, Inc. Components of Common Shareholders’ Equity
(In thousands)	Common Stock Amount			Paid-In Capital		Retained Earnings			Accumulated Other Comprehensive Loss, Net of Taxes			Total
Balance at September 30, 2014	$	525,932		$	11,847	$	716,758		$	(7,961	)	$	1,246,576
Net income	—			—		130,643			—			130,643
Other comprehensive loss	—			—		—			(3,437		)	(3,437		)
Repurchase of common stock	(41,485		)	—		—			—			(41,485		)
Stock-based compensation	1,009			1,934		—			—			2,943
Dividends declared:
Common stock	—			—		(67,877		)	—			(67,877		)
Preferred stock	—			—		(990		)	—			(990		)
Balance at June 30, 2015	$	485,456		$	13,781	$	778,534		$	(11,398	)	$	1,266,373

Washington Gas Light Company Components of Common Shareholder’s Equity
(In thousands)	Common Stock Amount		Paid-In Capital		Retained Earnings			Accumulated Other Comprehensive Income (Loss), Net of Taxes			Total
Balance at September 30, 2014	$	46,479	$	480,620	$	529,480		$	(6,413	)	$	1,050,166
Net income	—		—		128,221			—			128,221
Other comprehensive income	—		—		—			598			598
Stock-based compensation	—		1,773		—			—			1,773
Dividends declared:
Common stock	—		—		(59,051		)	—			(59,051		)
Preferred stock	—		—		(990		)	—			(990		)
Balance at June 30, 2015	$	46,479	$	482,393	$	597,660		$	(5,815	)	$	1,120,717

WGL had 49,728,662 and 50,656,553 shares issued of common stock at June 30, 2015 and September 30, 2014, respectively. Washington Gas had 46,479,536 shares issued of common stock at both June 30, 2015 and September 30, 2014.

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Other Investments Balance Sheet Location Table (Details) - USD ($) $ in Thousands	Jun. 30, 2015		Sep. 30, 2014
Assets [Abstract]
Investments in unconsolidated affiliates	$ 121,290		$ 100,528
Investments in direct financing leases, capital leases	25,826		18,159
VIEs
Assets [Abstract]
Investments in unconsolidated affiliates	85,900		72,600
Investments in direct financing leases, capital leases	25,800		18,200
Accounts receivable	3,300		1,700
Total assets	115,000		92,500
Non VIEs
Assets [Abstract]
Investments in unconsolidated affiliates	35,400		27,900
Investments in direct financing leases, capital leases	0		0
Accounts receivable	2,500	[1]	0
Total assets	37,900		27,900
Total
Assets [Abstract]
Investments in unconsolidated affiliates	121,300		100,500
Investments in direct financing leases, capital leases	25,800		18,200
Accounts receivable	5,800		1,700
Total assets	$ 152,900		$ 120,400

[1] Represents the financing provided to another partner in Mountain Valley to fund its capital commitment. Acquired ownership interest represents the collateral for repayment of the financing.

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Earnings Per Share (Tables)

9 Months Ended

Jun. 30, 2015

Earnings Per Share [Abstract]

Earnings per Share

The following table reflects the computation of our basic and diluted EPS for the three and nine months ended June 30, 2015 and 2014.

Basic and Diluted EPS
(in thousands, except per share data)	Net Income (Loss) Applicable to Common Stock			Shares	Per Share Amount
Three Months Ended June 30, 2015
Basic EPS	$	(15,690	)	49,729	$	(0.32	)
Stock-based compensation plans	—			—
Diluted EPS	$	(15,690	)	49,729	$	(0.32	)
Three Months Ended June 30, 2014
Basic EPS	$	(11,940	)	51,921	$	(0.23	)
Stock-based compensation plans	—			—
Diluted EPS	$	(11,940	)	51,921	$	(0.23	)
Nine Months Ended June 30, 2015
Basic EPS	$	129,653		49,814	$	2.60
Stock-based compensation plans	—			242
Diluted EPS	$	129,653		50,056	$	2.59
Nine Months Ended June 30, 2014
Basic EPS	$	67,902		51,871	$	1.31
Stock-based compensation plans	—			14
Diluted EPS	$	67,902		51,885	$	1.31

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Short-Term Debt (Details)		Jun. 30, 2015 USD ($) extension	Sep. 30, 2014 USD ($)
Short-term Debt [Line Items]
Less: Commercial Paper		$ (156,000,000)	$ (453,500,000)
Committed Credit
Short-term Debt [Line Items]
Unsecured revolving credit facility	[1]	800,000,000	800,000,000.0
Less: Commercial Paper		(156,000,000)	(453,500,000)
Net committed credit available		$ 644,000,000	$ 346,500,000
Weighted average interest rate		0.27%	0.19%
WGL
Short-term Debt [Line Items]
Outstanding bank loans		$ 0	$ 0
WGL | Committed Credit
Short-term Debt [Line Items]
Unsecured revolving credit facility	[1],[2]	450,000,000	450,000,000.0
Less: Commercial Paper	[2]	(156,000,000)	(364,500,000)
Net committed credit available	[2]	$ 294,000,000	$ 85,500,000
Weighted average interest rate	[2]	0.27%	0.20%
Number of one-year extension options | extension		2
Revolving credit facility maximum borrowing capacity		$ 550,000,000
Revolving credit facility additional borrowings		100,000,000
Washington Gas Light Company
Short-term Debt [Line Items]
Less: Commercial Paper		0	$ (89,000,000)
Outstanding bank loans		0	0
Washington Gas Light Company | Committed Credit
Short-term Debt [Line Items]
Unsecured revolving credit facility	[1]	350,000,000	350,000,000.0
Less: Commercial Paper		0	(89,000,000)
Net committed credit available		$ 350,000,000	$ 261,000,000
Weighted average interest rate		0.00%	0.13%
Number of one-year extension options | extension		2
Revolving credit facility maximum borrowing capacity		$ 450,000,000
Revolving credit facility additional borrowings		$ 100,000,000

[1] Both WGL and Washington Gas have the right to request extensions with the banks’ approval. WGL’s revolving credit facility permits it to borrow an additional $100 million, with the banks’ approval, for a total of $550 million. Washington Gas’ revolving credit facility permits it to borrow an additional $100 million, with the banks’ approval, for a total of $450 million.

[2] WGL includes WGL Holdings and all subsidiaries other than Washington Gas.

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Accumulated Other Comprehensive Income (Loss)

9 Months Ended

Jun. 30, 2015

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Income (Loss)

NOTE 15. ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS)

The following tables show the changes in accumulated other comprehensive income (loss) for WGL and Washington Gas by component for the three and nine months ended June 30, 2015 and 2014.

WGL Holdings, Inc. Changes in Accumulated Other Comprehensive Loss by Component
(In thousands)	Three Months Ended June 30,						Nine Months Ended June 30,
	2015			2014			2015			2014
Beginning Balance	$	(11,643	)	$	(10,969	)	$	(7,961	)	$	(11,048	)
Qualified cash flow hedging instruments(a)	49			—			(7,994		)	—
Change in prior service cost (credit) (b)	(170		)	6,204			(511		)	6,135
Amortization of actuarial loss (b)	529			404			1,503			604
Current-period other comprehensive income (loss)	408			6,608			(7,002		)	6,739
Income tax expense (benefit) related to other comprehensive income (loss)	163			2,622			(3,565		)	2,674
Ending Balance	$	(11,398	)	$	(6,983	)	$	(11,398	)	$	(6,983	)

(a) Cash flow hedging instruments represent interest rate swaps agreements on debt issuances. Refer to Note 8- Derivative and weather-related instruments for further discussion of the interest rate swap agreements.

(b) These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost. Refer to Note 14- Pension and other post-retirement benefit plans for additional details.

Washington Gas Light Company Changes in Accumulated Other Comprehensive Loss by Component
(In thousands)	Three Months Ended June 30,						Nine Months Ended June 30,
	2015			2014			2015			2014
Beginning Balance	$	(6,031	)	$	(10,969	)	$	(6,413	)	$	(11,048	)
Change in prior service cost (credit) (a)	(170		)	6,204			(511		)	6,135
Amortization of actuarial loss (a)	529			404			1,503			604
Current-period other comprehensive income	359			6,608			992			6,739
Income tax expense related to other comprehensive income	143			2,622			394			2,674
Ending Balance	$	(5,815	)	$	(6,983	)	$	(5,815	)	$	(6,983	)

^(a)  These accumulated other comprehensive income (loss) components are included in the computation of net periodic benefit cost. Refer to Note 14-Pension and other post-retirement benefit plans for additional details.