Significant Accounting Policies and Practices and Recent Accounting Pronouncements - Additional Details (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Jun. 30, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Subsidiary or Equity Method Investee [Line Items]
Document Period End Date		Sep. 30, 2017
Deconsolidation, Gain (Loss), Amount		$ 0.0	$ 0.0	$ 38.5
Impairment of Intangible Assets, Finite-lived		(16.3)	(15.4)	(60.2)
Debt Issuance Costs, Net		76.1	87.0
Deferred Tax Assets, Net		$ 20.2	18.3
Gain On Contingent Purchase Price Adjustment				8.5
Unrecognized Tax Benefits that Would Result in Deferred Tax Assets				0.0
FGL [Member]
Subsidiary or Equity Method Investee [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners		19.60%
Spectrum Brands [Member]
Subsidiary or Equity Method Investee [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners		40.40%
HGI
Subsidiary or Equity Method Investee [Line Items]
Gain On Contingent Purchase Price Adjustment		$ 0.0	0.0	8.5
Building and Building Improvements | Minimum [Member]
Subsidiary or Equity Method Investee [Line Items]
Property, Plant and Equipment, Estimated Useful Lives		20 years
Building and Building Improvements | Maximum
Subsidiary or Equity Method Investee [Line Items]
Property, Plant and Equipment, Estimated Useful Lives		40 years
Machinery, equipment and other | Minimum [Member]
Subsidiary or Equity Method Investee [Line Items]
Property, Plant and Equipment, Estimated Useful Lives		2 years
Machinery, equipment and other | Maximum
Subsidiary or Equity Method Investee [Line Items]
Property, Plant and Equipment, Estimated Useful Lives		15 years
Customer Relationships [Member] | Minimum [Member]
Subsidiary or Equity Method Investee [Line Items]
Amortization period, intangible asset		2 years
Customer Relationships [Member] | Maximum
Subsidiary or Equity Method Investee [Line Items]
Amortization period, intangible asset		20 years
Technology Assets [Member] | Minimum [Member]
Subsidiary or Equity Method Investee [Line Items]
Amortization period, intangible asset		4 years
Technology Assets [Member] | Maximum
Subsidiary or Equity Method Investee [Line Items]
Amortization period, intangible asset		18 years
Trade Name [Member] | Minimum [Member]
Subsidiary or Equity Method Investee [Line Items]
Amortization period, intangible asset		8 years
Trade Name [Member] | Maximum
Subsidiary or Equity Method Investee [Line Items]
Amortization period, intangible asset		17 years
Global Auto Care [Member]
Subsidiary or Equity Method Investee [Line Items]
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount		12.40%
Net Periodic Benefit Cost [Member]
Subsidiary or Equity Method Investee [Line Items]
Net periodic cost (benefit)	$ 8.3		4.8	4.7
Defined Benefit Plan, Service Cost	4.5		3.3	4.1
Defined Benefit Plan, Other Costs	$ 3.8		$ 1.5	$ 0.6