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	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Derivative Instruments, Gain (Loss) [Line Items]
Document Period End Date			Mar. 31, 2014
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	$ (1.8)	$ 1.5	$ (0.9)	$ 1.4
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	(0.2)	(0.1)	0	(0.1)
Amount of Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	0	0	(0.9)	(0.5)
Consumer products cost of goods sold [Member] | Commodity contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	(1.0)	(2.2)	0.1	(2.4)
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	(0.2)	(0.1)	0	(0.1)
Amount of Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	0.3	0.2	0	0.1
Consumer products cost of goods sold [Member] | Foreign exchange contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	(0.7)	3.6	(1.1)	3.2
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	0		0
Amount of Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	(0.3)	(0.4)	(1.0)	(0.9)
Net consumer products sales [Member] | Foreign exchange contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss) Recognized in AOCI on Derivatives (Effective Portion)	(0.1)	0.1	0.1	0.6
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	0		0
Amount of Gain (Loss) Reclassified from AOCI into Income (Effective Portion)	$ 0	$ 0.2	$ 0.1	$ 0.3