Divestment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Assets
Trade receivables	$ 63.7		$ 63.7
Inventories	47.6		47.6
Other current assets	18.4		18.4
Property, plant and equipment, net	73.8		73.8
Goodwill	63.8		63.8
Other intangible assets, net	564.9		564.9
Other assets	16.0		16.0
Assets held for sale	848.2		848.2
Liabilities
Accounts payable	38.8		38.8
Short term portion of capital leases	5.2		5.2
Other current liabilities	79.7		79.7
Long-term debt	27.1		27.1
Other liabilities (1)	238.8		238.8
Liabilities held for sale	389.6		389.6
Deferred tax liabilities	198.3		198.3
Pension liabilities	40.5		40.5
Disposal Group, Including Discontinued Operation, Income Statement Disclosures [Abstract]
Net sales	80.2
Cost of products sold	69.8
Gross profit	10.4
Selling, general and administrative expense	21.1
Advertising and sales promotion expense	0.3
Interest expense	6.7
Other items, net	(3.8)
Loss before income taxes from discontinued operations	(13.9)
Income tax benefit	(2.9)
Loss from discontinued operations, net of tax	(11.0)	$ 0.0	(11.0)	$ 0.0
Inventory fair value adjustment	11.2		$ 11.2
Pre-tax costs	5.7
Allocated pre-tax interest expense	$ 6.2