Derivative Financial Instruments - Pretax Impact of Derivative Instruments Designated as Cash Flow Hedges on the Accompanying Condensed Consolidated Statements of Operations, and Within AOCI (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	$ 13.1	$ (2.0)	$ (1.8)
Amount of Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	(2.6)	0.9	(3.1)
Amount of Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	0	0	0.1
Consumer products cost of goods sold | Commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	(1.6)	(2.6)	1.6
Amount of Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	(0.9)	(0.6)	(1.1)
Amount of Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	0	0	0.1
Consumer products cost of goods sold | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	12.7	(0.3)	(3.5)
Amount of Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	(2.6)	0.6	(0.6)
Amount of Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	0		0
Interest expense | Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	1.9	0
Amount of Gain (Loss) Reclassified from AOCI into Income (Effective Portion)		0	(0.9)
Amount of Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)			0
Interest expense | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	0.7
Net consumer products sales | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	0.1	0.9	0.1
Amount of Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	0.2	0.9	(0.5)
Amount of Gain (Loss) Recognized in Income on Derivatives (Ineffective Portion and Amount Excluded from Effectiveness Testing)	$ 0		$ 0