Segments, Revenue from External Customers by Products and Services (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenue from External Customer [Line Items]
Net sales	$ 374.3	$ 411.7	$ 1,232.5	$ 1,353.7
Alkaline batteries
Revenue from External Customer [Line Items]
Net sales	233.9	256.5	786.2	849.8
Other batteries and lighting products
Revenue from External Customer [Line Items]
Net sales	$ 140.4	$ 155.2	$ 446.3	$ 503.9