Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Income Statement [Abstract]
Net Sales	$ 1,984.3	$ 1,947.7	$ 5,911.1	$ 5,912.6
Cost of goods sold	1,388.1	1,370.4	4,173.8	4,183.1
Gross Profit	596.2	577.3	1,737.3	1,729.5
Selling, general and administrative expenses	312.1	324.5	958.5	988.7
Amortization of intangible assets	49.4	46.4	147.6	138.5
Other operating expense (income), net	0.1	3.2	0.3	(0.3)
Operating Profit	234.6	203.2	630.9	602.6
Interest expense, net	88.5	78.8	259.6	236.9
(Gain) loss on extinguishment of debt, net	0.0	(1.8)	5.8	(4.6)
Expense (income) on swaps, net	2.6	(3.1)	(7.3)	4.7
Other expense (income), net	0.2	(2.3)	1.7	(8.6)
Earnings before Income Taxes and Equity Method (Earnings) Loss	143.3	131.6	371.1	374.2
Income tax expense	34.7	31.7	86.8	88.8
Equity method (earnings) loss, net of tax	(0.1)	0.0	(0.4)	0.1
Net Earnings Including Noncontrolling Interest	108.7	99.9	284.7	285.3
Less: Net (loss) earnings attributable to noncontrolling interest	(0.1)	0.1	0.0	0.2
Net Earnings	$ 108.8	$ 99.8	$ 284.7	$ 285.1
Earnings Per Share [Abstract]
Earnings, Per Basic Share	$ 1.95	$ 1.66	$ 5.01	$ 4.72
Earnings, Per Diluted Share	$ 1.79	$ 1.53	$ 4.60	$ 4.36
Weighted Average Number of Shares Outstanding
Weighted-Average Common Shares Outstanding, Basic (in shares)	55.7	60.0	56.8	60.4
Weighted-Average Common Shares Outstanding, Diluted (in shares)	62.4	67.0	63.6	67.3