Discontinued Operations (Narrative) (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended		12 Months Ended	23 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2015	Mar. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Incremental costs to evaluate, plan and execute the Separation	[1]	$ 1.7	$ 32.2	$ 9.2	$ 56.0
Spin restructuring charges		0.0	22.8	0.0	24.0
New Energizer | Spinoff
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Charges related to spin and spin restructuring			55.0	9.2	80.0		$ 203.9
Spin restructuring charges			22.8		24.0		28.3
New Energizer | Spinoff | Selling, general and administrative expense
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Incremental costs to evaluate, plan and execute the Separation		1.7	31.5	9.0	55.3		171.2
New Energizer | Spinoff | Cost of products sold
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Incremental costs to evaluate, plan and execute the Separation			0.7	0.2	0.7		4.4
New Energizer | Spinoff | Discontinued operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Incremental costs to evaluate, plan and execute the Separation			16.1		33.1
Spin restructuring charges			$ 22.7		$ 24.3	$ 38.6
Non-Cash | New Energizer | Spinoff
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Charges related to spin and spin restructuring							9.7
Minimum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Incremental costs to evaluate, plan and execute the Separation, total for fiscal 2016		10.0		10.0			10.0
Maximum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Incremental costs to evaluate, plan and execute the Separation, total for fiscal 2016		$ 12.0		$ 12.0			$ 12.0

[1] Includes pre-tax SG&A of $1.7 and $9.0 for the three and six months ended March 31, 2016, respectively, and $31.5 and $55.3 for the three and six months ended March 31, 2015, respectively, and pre-tax Cost of products sold of $0.2 for the six months ended March 31, 2016 and $0.7 for the three and six months ended March 31, 2015.