CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Dec. 31, 2017	Sep. 30, 2017
ASSETS
Property, plant and equipment	$ 11,609,627	$ 11,301,304
Less accumulated depreciation and amortization	2,090,835	2,042,122
Net property, plant and equipment	9,518,792	9,259,182
Current assets
Cash and cash equivalents	54,750	26,409
Accounts receivable, net	489,217	222,263
Gas stored underground	163,959	184,653
Other current assets	70,984	106,321
Total current assets	778,910	539,646
Goodwill	730,132	730,132
Deferred charges and other assets	236,886	220,636
Total assets	11,264,720	10,749,596
Shareholders' equity
Common stock, no par value (stated at $.005 per share)	555	531
Additional paid-in capital	2,940,062	2,536,365
Accumulated other comprehensive income (loss)	(106,316)	(105,254)
Retained earnings	1,729,319	1,467,024
Shareholders' equity	4,563,620	3,898,666
Long-term debt	3,067,469	3,067,045
Total capitalization	7,631,089	6,965,711
Current liabilities
Accounts payable and accrued liabilities	285,675	233,050
Other current liabilities	336,919	332,648
Short-term debt	336,816	447,745
Total current liabilities	959,410	1,013,443
Deferred income taxes	1,033,206	1,878,699
Regulatory excess deferred taxes	746,246	0
Regulatory cost of removal obligation	480,086	485,420
Pension and postretirement liabilities	233,337	230,588
Deferred credits and other liabilities	181,346	175,735
Total shareholders' equity and liabilities	$ 11,264,720	$ 10,749,596