CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash Flows From Operating Activities
Net income	$ 453,000	$ 564,317
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	290,537	268,426
Deferred income taxes	120,220	139,852
One-time income tax benefit	0	(165,522)
Other	9,649	18,007
Net assets / liabilities from risk management activities	(1,976)	912
Net change in operating assets and liabilities	(62,502)	209,304
Net cash provided by operating activities	808,928	1,035,296
Cash Flows From Investing Activities
Capital expenditures	(1,199,199)	(1,088,472)
Proceeds from the sale of discontinued operations	4,000	3,000
Debt and equity securities activities, net	(4,041)	(7,857)
Other, net	3,839	6,105
Net cash used in investing activities	(1,195,401)	(1,087,224)
Cash Flows From Financing Activities
Net decrease in short-term debt	(500,838)	(202,968)
Net proceeds from equity offering	593,731	395,092
Issuance of common stock through stock purchase and employee retirement plans	14,128	15,850
Proceeds from issuance of long-term debt	1,045,221	0
Settlements of interest rate swap	90,141	0
Repayments of Long-term Debt	450,000	0
Cash dividends paid	(181,982)	(160,007)
Debt issuance costs	(11,254)	0
Other	0	(1,518)
Net cash provided by financing activities	418,865	46,449
Net increase (decrease) in cash and cash equivalents	32,392	(5,479)
Cash and cash equivalents at beginning of period	13,771	26,409
Cash and cash equivalents at end of period	$ 46,163	$ 20,930