Condensed Consolidated Statements of Operations - USD ($) $ in Millions		3 Months Ended
		Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Net sales		$ 1,754.9	$ 1,576.5
Cost of products sold		1,293.3	1,176.8
Gross profit		461.6	399.7
Operating expense:
Selling, general and administrative		294.2	265.2
Depreciation		16.5	13.9
Amortization		22.2	25.5
Loss on sale of business	[1],[2]	22.3	355.4
Total operating expense		355.2	304.6
Income (loss) from operations		106.4	95.1
Interest expense, financing costs, and other		17.4	30.0
Income (loss) from continuing operations before income taxes		89.0	65.1
Provision for (benefit from) income taxes		20.9	17.7
Net income (loss) from continuing operations		68.1	47.4
Net income (loss) from discontinued operations	[3]	(0.1)	(267.9)
Net income (loss)		68.0	(220.5)
Dividends on Preferred Stock		6.0	6.0
Net income (loss) attributable to common stockholders		$ 62.0	$ (226.5)
Weighted-average common stock outstanding:
Basic	[4]	70,300,000	69,200,000
Diluted	[4]	71,500,000	70,000,000.0
Net income (loss) per share:
Basic - Continuing operations	[4]	$ 0.78	$ 0.60
Basic - Discontinued operations	[4]		(3.87)
Basic net income (loss) per share	[4]	0.78	(3.27)
Diluted - Continuing operations	[4]	0.76	0.59
Diluted - Discontinued operations	[4]		(3.83)
Diluted net income (loss) per share	[4]	$ 0.76	$ (3.24)

[1] See Note 4 for additional information.

[2] Unless otherwise noted, amounts include both continuing and discontinued operations.

[3] See Note 4 for additional information.

[4] See Note 6 for detailed calculations and further discussion.