COMBINED STATEMENTS OF EARNINGS AND COMPREHENSIVE INCOME (Condensed) (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net sales	$ 556.4	$ 374.4	$ 1,128.3	$ 947.7
Cost of products sold	362.2	205.9	658.6	500.9
Gross profit	194.2	168.5	469.7	446.8
Selling, general and administrative expense	141.3	104.2	245.9	203.4
Advertising and sales promotion expense	24.7	20.9	65.6	58.2
Research and development expense	8.7	5.4	14.2	10.7
Amortization of intangible assets	12.5	2.8	15.7	5.6
Interest expense	77.2	16.5	125.4	29.9
Total Other items, net	3.8	0.9	(13.1)	2.2
(Loss)/earnings before income taxes	(74.0)	17.8	16.0	136.8
Income tax (benefit)/provision	(11.7)	10.0	7.5	68.6
Net (loss)/earnings from continuing operations	(62.3)	7.8	8.5	68.2
Net loss from discontinued operations, net of income tax benefit of $2.9	(11.0)	0.0	(11.0)	0.0
Net (loss)/earnings	(73.3)	7.8	(2.5)	68.2
Mandatory preferred stock dividends	(3.3)	0.0	(3.3)	0.0
Net (loss)/earnings attributable to common shareholders	$ (76.6)	$ 7.8	$ (5.8)	$ 68.2
Basic net (loss)/earnings per common share- continuing operations (in dollars per share)	$ (0.97)	$ 0.13	$ 0.08	$ 1.14
Basic net loss per common share- discontinued operations (in dollars per share)	(0.17)	0	(0.17)	0
Basic net (loss)/earnings per common share (in dollars per share)	(1.14)	0.13	(0.09)	1.14
Diluted net (loss)/earnings per common share- continuing operations (in dollars per share)	(0.97)	0.13	0.08	1.11
Diluted net loss per common share- discontinued operations (in dollars per share)	(0.17)	0	(0.17)	0
Diluted net (loss)/earnings per common share (in dollars per share)	$ (1.14)	$ 0.13	$ (0.09)	$ 1.11
Weighted average shares of common stock - Basic (shares)	67.3	59.7	63.5	60.0
Weighted average shares of common stock - Diluted (shares)	67.3	61.1	64.6	61.3
Statements of Comprehensive Income:
Net (loss)/earnings	$ (73.3)	$ 7.8	$ (2.5)	$ 68.2
Other comprehensive (loss)/income, net of tax (benefit)/expense
Foreign currency translation adjustments	20.3	9.3	16.6	16.6
Pension activity, net of tax of $0.3 and $0.6, for the quarter and six months ended March 31, 2019, respectively, and $0.3 and $0.8 for the quarter and six months ended March 31, 2018, respectively.	1.0	0.6	2.1	1.8
Deferred (loss)/gain on hedging activity, net of tax of ($0.8) and ($1.8), for the quarter and six months ended March 31, 2019, respectively, and $1.5 and $2.6 for the quarter and six months ended March 31, 2018, respectively.	(1.1)	3.8	(4.4)	6.3
Total comprehensive (loss)/income	$ (53.1)	$ 21.5	$ 11.8	$ 92.9