Capitalization (Tables)

6 Months Ended

Mar. 31, 2022

Capitalization, Long-term Debt and Equity [Abstract]

Summary of Changes in Common Stock Equity

Summary of Changes in Common Stock Equity

	Common Stock			Paid In Capital		Earnings Reinvested in the Business		Accumulated Other Comprehensive Income (Loss)
	Shares	Amount
	(Thousands, except per share amounts)
Balance at January 1, 2022	91,437	$	91,437	$	1,013,821	$	1,281,963	$	(277,026)
Net Income Available for Common Stock						167,328
Dividends Declared on Common Stock ($0.455 Per Share)						(41,608)
Other Comprehensive Loss, Net of Tax								(377,228)
Share-Based Payment Expense (1)				4,692
Common Stock Issued Under Stock and Benefit Plans	12	12		271
Balance at March 31, 2022	91,449	$	91,449	$	1,018,784	$	1,407,683	$	(654,254)
Balance at October 1, 2021	91,182	$	91,182	$	1,017,446	$	1,191,175	$	(513,597)
Net Income Available for Common Stock						299,720
Dividends Declared on Common Stock ($0.91 Per Share)						(83,212)
Other Comprehensive Loss, Net of Tax								(140,657)
Share-Based Payment Expense (1)				9,732
Common Stock Issued (Repurchased) Under Stock and Benefit Plans	267	267		(8,394)
Balance at March 31, 2022	91,449	$	91,449	$	1,018,784	$	1,407,683	$	(654,254)
Balance at January 1, 2021	91,153	$	91,153	$	1,004,369	$	1,028,844	$	(79,741)
Net Income Available for Common Stock						112,436
Dividends Declared on Common Stock ($0.445 Per Share)						(40,562)
Other Comprehensive Loss, Net of Tax								(22,247)
Share-Based Payment Expense (1)				4,283
Common Stock Issued Under Stock and Benefit Plans	11	11		423
Balance at March 31, 2021	91,164	$	91,164	$	1,009,075	$	1,100,718	$	(101,988)
Balance at October 1, 2020	90,955	$	90,955	$	1,004,158	$	991,630	$	(114,757)
Net Income Available for Common Stock						190,210
Dividends Declared on Common Stock ($0.89 Per Share)						(81,122)
Other Comprehensive Income, Net of Tax								12,769
Share-Based Payment Expense (1)				7,779
Common Stock Issued (Repurchased) Under Stock and Benefit Plans	209	209		(2,862)
Balance at March 31, 2021	91,164	$	91,164	$	1,009,075	$	1,100,718	$	(101,988)

(1)Paid in Capital includes compensation costs associated with performance shares and/or restricted stock awards. The expense is included within Net Income Available For Common Stock, net of tax benefits.