CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Millions, $ in Millions		Total		Common Stock [Member]	Capital in Excess of Par Value [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Noncontrolling Interests [Member]
Beginning balance at Sep. 30, 2022				254.4
Beginning balance at Sep. 30, 2022				$ 2.5	$ 10,639.4	$ 2,214.4	$ (1,454.3)	$ 17.7	[1]
Compensation expense under share-based plans					9.6
Net (loss) income attributable to common stockholders						45.3
Dividends declared (per share - $0.3025 and $0.275)	[2]					(71.4)
Issuance of common stock, net of stock received for tax withholdings				0.2
Issuance of common stock, net of stock received for tax withholdings					3.6
Other comprehensive income, net of tax		$ 145.4	[3]				145.4
Net (loss) income		1.5						0.1	[1]
Total Stockholders' equity at Dec. 31, 2022		11,534.5
Ending balance at Dec. 31, 2022				254.6
Ending balance at Dec. 31, 2022		$ 11,552.3		$ 2.5	10,652.6	2,188.3	(1,308.9)	17.8	[1]
Beginning balance at Sep. 30, 2023		256.4		256.4
Beginning balance at Sep. 30, 2023		$ 10,097.7		$ 2.6	10,698.5	278.2	(898.6)	17.0	[1]
Compensation expense under share-based plans					8.4
Net (loss) income attributable to common stockholders						(22.4)
Dividends declared (per share - $0.3025 and $0.275)	[2]					(79.3)
Issuance of common stock, net of stock received for tax withholdings				0.6
Issuance of common stock, net of stock received for tax withholdings					3.3
Other comprehensive income, net of tax		157.1	[3]				157.1
Net (loss) income		(0.3)						(0.3)	[1]
Adjustments to noncontrolling interests	[1]							0.1
Total Stockholders' equity at Dec. 31, 2023		$ 10,147.8
Ending balance at Dec. 31, 2023		257.0		257.0
Ending balance at Dec. 31, 2023		$ 10,164.6		$ 2.6	$ 10,710.2	$ 176.5	$ (741.5)	$ 16.8	[1]

[1] Excludes amounts related to contingently redeemable noncontrolling interests, which are separately classified outside of permanent equity on the consolidated balance sheets.

[2] Includes cash dividends and dividend equivalent units on certain equity awards.

[3] All amounts are net of tax and noncontrolling interests.