Guarantor and Non-Guarantor Financial Information (Schedule of Condensed Consolidating Statements of Cash Flows) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash Flow from Operating Activities
Net cash flow (used by) from operations	$ (46.9)	$ (46.4)
Cash Flow from Investing Activities
Capital expenditures	(7.6)	(9.4)
Proceeds from sale of Infant and Pet Care business	95.8	0.0
Collection of deferred purchase price from accounts receivable sold	2.8	2.5
Proceeds from sale of assets	0.0	4.0
Intercompany receivables (payables), net	0.0
Payments for other investing activities	(1.3)	0.0
Net cash from (used by) investing activities	89.7	(2.9)
Cash Flow from Financing Activities
Cash proceeds from debt with original maturities greater than 90 days	50.0	137.0
Cash payments on debt with original maturities greater than 90 days	(167.0)	(105.0)
Net decrease in debt with original maturities of 90 days or less	(0.1)	(0.9)
Interco receivables (payables), net	0.0
Net financing outflow from the Accounts Receivable Facility	(14.9)	(5.1)
Intercompany dividend	0.0	0.0
Employee shares withheld for taxes	(1.5)	(1.5)
Payments for other financing activities	(2.4)	0.0
Net cash from (used by) financing activities	(135.9)	24.5
Effect of exchange rate changes on cash	3.3	(1.7)
Net decrease in cash and cash equivalents	(89.8)	(26.5)
Cash and cash equivalents, beginning of period	341.6	266.4
Cash and cash equivalents, end of period	251.8	239.9
Eliminations
Cash Flow from Operating Activities
Net cash flow (used by) from operations	(163.1)	(45.0)
Cash Flow from Investing Activities
Capital expenditures	0.0	0.0
Proceeds from sale of Infant and Pet Care business	0.0
Collection of deferred purchase price from accounts receivable sold	0.0	0.0
Proceeds from sale of assets	0.0	0.0
Intercompany receivables (payables), net	22.5
Payments for other investing activities	0.0
Net cash from (used by) investing activities	22.5	0.0
Cash Flow from Financing Activities
Cash proceeds from debt with original maturities greater than 90 days	0.0	0.0
Cash payments on debt with original maturities greater than 90 days	0.0	0.0
Net decrease in debt with original maturities of 90 days or less	0.0	0.0
Interco receivables (payables), net	(22.5)
Net financing outflow from the Accounts Receivable Facility	0.0	0.0
Intercompany dividend	163.1	45.0
Employee shares withheld for taxes	0.0	0.0
Payments for other financing activities	0.0
Net cash from (used by) financing activities	140.6	45.0
Effect of exchange rate changes on cash	0.0	0.0
Net decrease in cash and cash equivalents	0.0	0.0
Cash and cash equivalents, beginning of period	0.0	0.0
Cash and cash equivalents, end of period	0.0	0.0
Parent
Cash Flow from Operating Activities
Net cash flow (used by) from operations	(21.0)	1.5
Cash Flow from Investing Activities
Capital expenditures	0.0	0.0
Proceeds from sale of Infant and Pet Care business	0.0
Collection of deferred purchase price from accounts receivable sold	0.0	0.0
Proceeds from sale of assets	0.0	0.0
Intercompany receivables (payables), net	0.0
Payments for other investing activities	0.0
Net cash from (used by) investing activities	0.0	0.0
Cash Flow from Financing Activities
Cash proceeds from debt with original maturities greater than 90 days	0.0	0.0
Cash payments on debt with original maturities greater than 90 days	0.0	0.0
Net decrease in debt with original maturities of 90 days or less	0.0	0.0
Interco receivables (payables), net	22.5
Net financing outflow from the Accounts Receivable Facility	0.0	0.0
Intercompany dividend	0.0	0.0
Employee shares withheld for taxes	(1.5)	(1.5)
Payments for other financing activities	0.0
Net cash from (used by) financing activities	21.0	(1.5)
Effect of exchange rate changes on cash	0.0	0.0
Net decrease in cash and cash equivalents	0.0	0.0
Cash and cash equivalents, beginning of period	0.0	0.0
Cash and cash equivalents, end of period	0.0	0.0
Guarantors
Cash Flow from Operating Activities
Net cash flow (used by) from operations	135.4	(24.6)
Cash Flow from Investing Activities
Capital expenditures	(4.7)	(6.5)
Proceeds from sale of Infant and Pet Care business	95.8
Collection of deferred purchase price from accounts receivable sold	2.8	2.5
Proceeds from sale of assets	0.0	4.0
Intercompany receivables (payables), net	(22.5)
Payments for other investing activities	0.0
Net cash from (used by) investing activities	71.4	0.0
Cash Flow from Financing Activities
Cash proceeds from debt with original maturities greater than 90 days	50.0	137.0
Cash payments on debt with original maturities greater than 90 days	(167.0)	(105.0)
Net decrease in debt with original maturities of 90 days or less	(2.1)	(2.6)
Interco receivables (payables), net	0.0
Net financing outflow from the Accounts Receivable Facility	(14.9)	(5.1)
Intercompany dividend	0.0	0.0
Employee shares withheld for taxes	0.0	0.0
Payments for other financing activities	(2.4)
Net cash from (used by) financing activities	(136.4)	24.3
Effect of exchange rate changes on cash	0.0	0.0
Net decrease in cash and cash equivalents	70.4	(0.3)
Cash and cash equivalents, beginning of period	2.6	2.5
Cash and cash equivalents, end of period	73.0	2.2
Non-Guarantors
Cash Flow from Operating Activities
Net cash flow (used by) from operations	1.8	21.7
Cash Flow from Investing Activities
Capital expenditures	(2.9)	(2.9)
Proceeds from sale of Infant and Pet Care business	0.0
Collection of deferred purchase price from accounts receivable sold	0.0	0.0
Proceeds from sale of assets	0.0	0.0
Intercompany receivables (payables), net	0.0
Payments for other investing activities	(1.3)
Net cash from (used by) investing activities	(4.2)	(2.9)
Cash Flow from Financing Activities
Cash proceeds from debt with original maturities greater than 90 days	0.0	0.0
Cash payments on debt with original maturities greater than 90 days	0.0	0.0
Net decrease in debt with original maturities of 90 days or less	2.0	1.7
Interco receivables (payables), net	0.0
Net financing outflow from the Accounts Receivable Facility	0.0	0.0
Intercompany dividend	(163.1)	(45.0)
Employee shares withheld for taxes	0.0	0.0
Payments for other financing activities	0.0
Net cash from (used by) financing activities	(161.1)	(43.3)
Effect of exchange rate changes on cash	3.3	(1.7)
Net decrease in cash and cash equivalents	(160.2)	(26.2)
Cash and cash equivalents, beginning of period	339.0	263.9
Cash and cash equivalents, end of period	$ 178.8	$ 237.7