Capitalization (Tables)

6 Months Ended

Mar. 31, 2019

Capitalization, Long-term Debt and Equity [Abstract]

Summary of Changes in Common Stock Equity



	Common Stock			Paid In Capital			Earnings Reinvested in the Business			Accumulated Other Comprehensive Income (Loss)
	Shares	Amount		Paid In Capital			Earnings Reinvested in the Business			Accumulated Other Comprehensive Income (Loss)
	(Thousands, except per share amounts)
Balance at January 1, 2019	86,271	$	86,271	$	817,076		$	1,172,334		$	(28,690	)
Net Income Available for Common Stock							90,595
Dividends Declared on Common Stock ($0.425 Per Share)							(36,678		)
Cumulative Effect of Adoption of Authoritative Guidance for Reclassification of Stranded Tax Effects							10,406
Other Comprehensive Loss, Net of Tax										(25,596		)
Share-Based Payment Expense ⁽¹⁾				5,038
Common Stock Issued (Repurchased) Under Stock and Benefit Plans	30	30		(277		)
Balance at March 31, 2019	86,301	$	86,301	$	821,837		$	1,236,657		$	(54,286	)

Balance at October 1, 2018	85,957	$	85,957	$	820,223		$	1,098,900		$	(67,750	)
Net Income Available for Common Stock							193,256
Dividends Declared on Common Stock ($0.85 Per Share)							(73,342		)
Cumulative Effect of Adoption of Authoritative Guidance for Financial Assets and Liabilities							7,437
Cumulative Effect of Adoption of Authoritative Guidance for Reclassification of Stranded Tax Effects							10,406
Other Comprehensive Income, Net of Tax										13,464
Share-Based Payment Expense ⁽¹⁾				9,955
Common Stock Issued (Repurchased) Under Stock and Benefit Plans	344	344		(8,341		)
Balance at March 31, 2019	86,301	$	86,301	$	821,837		$	1,236,657		$	(54,286	)

Balance at January 1, 2018	85,761	$	85,761	$	800,348		$	1,014,733		$	(40,919	)
Net Income Available for Common Stock							91,847
Dividends Declared on Common Stock ($0.415 Per Share)							(35,641		)
Other Comprehensive Loss, Net of Tax										(6,841		)
Share-Based Payment Expense ⁽¹⁾				3,563
Common Stock Issued Under Stock and Benefit Plans	121	121		6,215
Balance at March 31, 2018	85,882	$	85,882	$	810,126		$	1,070,939		$	(47,760	)

Balance at October 1, 2017	85,543	$	85,543	$	796,646		$	851,669		$	(30,123	)
Net Income Available for Common Stock							290,501
Dividends Declared on Common Stock ($0.83 Per Share)							(71,231		)
Other Comprehensive Loss, Net of Tax										(17,637		)
Share-Based Payment Expense ⁽¹⁾				7,074
Common Stock Issued Under Stock and Benefit Plans	339	339		6,406
Balance at March 31, 2018	85,882	$	85,882	$	810,126		$	1,070,939		$	(47,760	)

⁽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.