Long-term and Short-term Debt (Tables)

12 Months Ended

Sep. 30, 2020

Debt Disclosure [Abstract]

Schedule of Debt

Long-term debt consists of (in millions):

	September 30,
	2020			2019
2.050% notes, repaid in March 2020	$	—		$	299.4
2.875% notes, payable in March 2025	320.1			307.6
6.70% debentures, payable in January 2028	250.0			250.0
3.500% notes, payable in March 2029	425.0			425.0
6.25% debentures, payable in December 2037	250.0			250.0
4.200% notes, payable in March 2049	575.0			575.0
5.20% debentures, payable in January 2098	200.0			200.0
Unamortized discount, capitalized lease obligations and other	(45.4		)	(50.1		)
Total	1,974.7			2,256.9
Less current portion	—			(300.5		)
Long-term debt	$	1,974.7		$	1,956.4

Schedule of Fair Value of Long-term Debt

The following table presents the carrying amounts and estimated fair values of long-term debt not recorded at fair value in the Consolidated Balance Sheet (in millions):

	September 30, 2020				September 30, 2019
	Carrying Value		Fair Value		Carrying Value		Fair Value
Current portion of long-term debt	$	—	$	—	$	300.5	$	300.1
Long-term debt	1,974.7		2,497.7		1,956.4		2,380.8