Consolidated Statements of Shareholders' Equity/(Deficit) - USD ($) shares in Thousands, $ in Millions	Total	Selling, general and administrate expense	Preferred Stock	Common Stock	Additional Paid-in Capital	Retained Earnings/(Losses)	Accumulated Other Comprehensive (Loss)/Income	Treasury Stock
Beginning balance, preferred (in shares) at Sep. 30, 2019			2,156
Beginning balance, common (in shares) at Sep. 30, 2019				68,902
Beginning Balance at Sep. 30, 2019	$ 543.8		$ 0.0	$ 0.7	$ 870.3	$ 129.5	$ (298.3)	$ (158.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings from continuing operations	46.8					46.8
Loss from discontinued operations, net of tax	(140.1)					(140.1)
Share-based payments		$ 24.5
Deferred compensation (in shares)				125
Deferred compensation plan	0.0				(5.7)			5.7
Share based expense	24.5				24.5
Common stock purchased (in shares)				(980)
Common stock purchased	(45.0)							(45.0)
Activity under stock plans (in shares)				471
Activity under stock plans	(11.3)				(29.9)	(2.2)		20.8
Dividends to common shareholders	(84.0)					(84.0)
Dividends to preferred shareholders	(16.2)					(16.2)
Other comprehensive loss	(9.4)						(9.4)
Beginning balance, preferred (in shares) at Sep. 30, 2020			2,156
Ending Balance, common (in shares) at Sep. 30, 2020				68,518
Ending Balance at Sep. 30, 2020	309.1		$ 0.0	$ 0.7	859.2	(66.2)	(307.7)	(176.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings from continuing operations	160.9					160.9
Loss from discontinued operations, net of tax	0.0
Share-based payments		10.2
Deferred compensation (in shares)				22
Deferred compensation plan	0.0				(1.0)			1.0
Share based expense	10.2				10.2
Common stock purchased (in shares)				(2,008)
Common stock purchased	(96.3)				(15.0)			(81.3)
Activity under stock plans (in shares)				332
Activity under stock plans	(6.7)				(21.4)	(0.9)		15.6
Dividends to common shareholders	(82.6)					(82.6)
Dividends to preferred shareholders	(16.2)					(16.2)
Other comprehensive loss	77.3						77.3
Beginning balance, preferred (in shares) at Sep. 30, 2021			2,156
Ending Balance, common (in shares) at Sep. 30, 2021				66,864
Ending Balance at Sep. 30, 2021	355.7		$ 0.0	$ 0.7	832.0	(5.0)	(230.4)	(241.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings from continuing operations	(231.5)					(231.5)
Loss from discontinued operations, net of tax	0.0
Share-based payments	13.2	$ 13.2			13.2
Stock Issued During Period, Value, Conversion of Convertible Securities	0.1			$ 0.1
Stock issued during period, shares, conversion of convertible securities			(2,156)	4,687
Common stock purchased (in shares)				(451)
Common stock purchased	0.0				15.0			(15.0)
Activity under stock plans (in shares)				170
Activity under stock plans	(2.5)				(10.1)	(0.1)		7.7
Dividends to common shareholders	(85.5)				(21.4)	(64.1)
Dividends to preferred shareholders	(4.0)
Other comprehensive loss	85.1						85.1
Beginning balance, preferred (in shares) at Sep. 30, 2022			0
Ending Balance, common (in shares) at Sep. 30, 2022				71,270
Ending Balance at Sep. 30, 2022	$ 130.6		$ 0.0	$ 0.8	$ 828.7	$ (304.7)	$ (145.3)	$ (248.9)