Consolidated Balance Sheets (Unaudited) (USD $) In Thousands	9 Months Ended	12 Months Ended
	Jun. 30, 2011	Sep. 30, 2010
WGL Holdings, Inc.
Property, Plant and Equipment
At original cost	$ 3,496,643	$ 3,383,364
Accumulated depreciation and amortization	(1,068,567)	(1,037,156)
Net property, plant and equipment	2,428,076	2,346,208
Current Assets
Cash and cash equivalents	139,030	8,849
Receivables
Accounts receivable	247,751	208,467
Gas costs and other regulatory assets	6,347	18,714
Unbilled revenues	103,773	91,337
Allowance for doubtful accounts	(19,340)	(20,306)
Net receivables	338,531	298,212
Materials and supplies-principally at average cost	23,838	24,646
Storage gas-at cost (first-in, first-out)	207,765	242,223
Deferred income taxes	18,699	22,808
Other prepayments	75,245	93,700
Derivatives and other	19,748	26,827
Total current assets	822,856	717,265
Deferred charges in other assets
Gas costs	7,324	5,991
Pension and other post-retirement benefits	438,135	452,035
Other	63,555	73,342
Derivatives and other	36,731	49,053
Total deferred charges and other assets	545,745	580,421
Total Assets	3,796,677	3,643,894
Capitalization
Common shareholders' equity	1,252,176	1,153,395
Washington Gas Light Company preferred stock	28,173	28,173
Long-term debt	587,239	592,875
Total capitalization	1,867,588	1,774,443
Current Liabilities
Current maturities of long-term debt	77,103	30,098
Notes payable	13,022	100,417
Accounts payable and other accrued liabilities	282,194	225,362
Wages payable	19,123	16,411
Accrued interest	12,423	3,983
Dividends declared	20,206	19,604
Customer deposits and advance payments	63,799	65,343
Gas costs and other regulatory liabilities	21,895	9,893
Deferred income taxes	0	0
Accrued taxes	37,755	14,828
Derivatived and other	27,993	58,112
Total current liabilities	575,513	544,051
Deferred Credits
Unamortized investment tax credits	9,852	10,561
Deferred income taxes	512,477	472,544
Accrued pensions and benefits	353,292	359,729
Asset retirement obligations	66,252	64,017
Regulatory liabilities
Accrued asset removal costs	326,443	323,091
Gas costs	0	0
Other	13,668	13,446
Derivatives and other	71,592	82,012
Total deferred credits	1,353,576	1,325,400
Commitments and Contingencies (Note 13)
Total Capitalization and Liabilities	3,796,677	3,643,894
Washington Gas Light Company
Property, Plant and Equipment
At original cost	3,440,621	3,343,842
Accumulated depreciation and amortization	(1,044,096)	(1,014,314)
Net property, plant and equipment	2,396,525	2,329,528
Current Assets
Cash and cash equivalents	136,303	4,390
Receivables
Accounts receivable	112,566	78,357
Gas costs and other regulatory assets	6,347	18,714
Unbilled revenues	25,810	20,484
Allowance for doubtful accounts	(16,669)	(16,704)
Net receivables	128,054	100,851
Materials and supplies-principally at average cost	23,786	24,594
Storage gas-at cost (first-in, first-out)	123,507	169,267
Deferred income taxes	16,482	10,633
Other prepayments	45,679	59,317
Receivables from associated companies	257	1,949
Derivatives and other	2,858	7,050
Total current assets	476,926	378,051
Deferred charges in other assets
Gas costs	7,324	5,991
Pension and other post-retirement benefits	435,419	449,383
Other	63,550	73,336
Derivatives and other	19,745	33,987
Total deferred charges and other assets	526,038	562,697
Total Assets	3,399,489	3,270,276
Capitalization
Common shareholders' equity	1,048,944	994,876
Washington Gas Light Company preferred stock	28,173	28,173
Long-term debt	587,239	592,875
Total capitalization	1,664,356	1,615,924
Current Liabilities
Current maturities of long-term debt	77,103	30,098
Notes payable	22	43,419
Accounts payable and other accrued liabilities	134,706	127,358
Wages payable	18,141	15,512
Accrued interest	12,423	3,983
Dividends declared	18,667	18,460
Customer deposits and advance payments	63,799	63,343
Gas costs and other regulatory liabilities	21,895	9,893
Deferred income taxes	0	0
Accrued taxes	21,399	13,277
Payables to associated companies	17,459	9,170
Derivatived and other	8,793	19,714
Total current liabilities	394,407	354,227
Deferred Credits
Unamortized investment tax credits	8,900	9,570
Deferred income taxes	512,693	477,912
Accrued pensions and benefits	350,839	357,456
Asset retirement obligations	65,066	62,801
Regulatory liabilities
Accrued asset removal costs	326,443	323,091
Gas costs	0	0
Other	13,668	13,446
Derivatives and other	63,117	55,849
Total deferred credits	1,340,726	1,300,125
Commitments and Contingencies (Note 13)
Total Capitalization and Liabilities	$ 3,399,489	$ 3,270,276