Capitalization (Tables)

3 Months Ended

Dec. 31, 2023

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 October 1, 2023	91,819	$	91,819	$	1,040,761	$	1,885,856	$	(55,060)
Net Income Available for Common Stock						133,020
Dividends Declared on Common Stock ($0.495 Per Share)						(45,597)
Other Comprehensive Income, Net of Tax								122,441
Share-Based Payment Expense (1)				4,135
Common Stock Issued (Repurchased) Under Stock and Benefit Plans	297	297		(3,670)
Balance at December 31, 2023	92,116	$	92,116	$	1,041,226	$	1,973,279	$	67,381
Balance at October 1, 2022	91,478	$	91,478	$	1,027,066	$	1,587,085	$	(625,733)
Net Income Available for Common Stock						169,689
Dividends Declared on Common Stock ($0.475 Per Share)						(43,598)
Other Comprehensive Income, Net of Tax								331,987
Share-Based Payment Expense (1)				5,118
Common Stock Issued (Repurchased) Under Stock and Benefit Plans	309	309		(6,545)
Balance at December 31, 2022	91,787	$	91,787	$	1,025,639	$	1,713,176	$	(293,746)

(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.