Details of Selected Consolidated Balance Sheet Captions (Table)

12 Months Ended

Sep. 30, 2012

Details of Selected Consolidated Balance Sheet Captions Tables [Abstract]

Accounts Receivables Detail Table

	September 30
	2012		2011
		(In thousands)
Billed accounts receivable	$	177,953	$	216,145
Unbilled revenue		42,694		48,006
Other accounts receivable		23,304		16,592
Total accounts receivable		243,951		280,743
Less: allowance for doubtful accounts		(9,425)		(7,440)
Net accounts receivable	$	234,526	$	273,303

Other Current Assets Detail Table

	September 30
	2012		2011
	(In thousands)
Assets from risk management activities	$	24,707	$	18,344
Deferred gas costs		31,359		33,976
Taxes receivable		1,291		9,215
Current deferred tax asset		27,091		76,725
Prepaid expenses		17,114		22,499
Current portion of leased assets receivable		168		2,013
Materials and supplies		5,872		4,113
Assets held for sale		154,571		140,571
Other		10,609		9,015
Total	$	272,782	$	316,471

Property, Plant and Equipment Detail Table

		September 30
		2012		2011
		(In thousands)
Production plant		$	5,020	$	7,412
Storage plant			232,260		198,422
Transmission plant			1,185,007		1,126,509
Distribution plant			4,680,877		4,496,263
General plant			717,568		737,850
Intangible plant			39,626		41,096
			6,860,358		6,607,552
Construction in progress			274,112		209,242
			7,134,470		6,816,794
Less: accumulated depreciation and amortization			(1,658,866)		(1,668,876)
	Net property, plant and equipment	$	5,475,604	$	5,147,918

Deferred Charges and Other Assets Detail Table

	September 30
	2012		2011
	(In thousands)
Marketable securities	$	64,398	$	52,633
Regulatory assets		334,551		278,920
Deferred financing costs		35,101		35,149
Assets from risk management activities		2,283		998
Other		14,929		16,093
Total	$	451,262	$	383,793

Other Current Liabilities Detail Table

	September 30
	2012		2011
	(In thousands)
Customer credit balances and deposits	$	100,926	$	106,743
Accrued employee costs		37,675		38,558
Deferred gas costs		23,072		8,130
Accrued interest		34,451		37,557
Liabilities from risk management activities		85,381		15,453
Taxes payable		64,319		57,853
Pension and postretirement obligations		39,625		33,036
Regulatory cost of removal accrual		78,525		35,078
Liabilities held for sale		11,573		18,445
Other		14,118		16,710
Total	$	489,665	$	367,563

Deferred Credits and Other Liabilities Detail Table

	September 30
	2012		2011
	(In thousands)
Postretirement obligations	$	221,231	$	202,709
Retirement plan obligations		235,965		236,227
Customer advances for construction		12,937		13,967
Regulatory liabilities		5,638		13,823
Asset retirement obligation		10,394		13,574
Liabilities from risk management activities		9,206		78,089
Other		12,555		6,306
Total	$	507,926	$	564,695