Restructuring and Other Charges, net (Additional Information) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Jun. 30, 2014	Jun. 30, 2014 Person	Jun. 30, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 14.1
Number of personnel eliminated		200
Loss Contingency, Loss in Period	0.1	3.1
Gain (Loss) on Disposition of Business			(0.8)
Personnel
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		10.9
Facilities
Restructuring Cost and Reserve [Line Items]
Restructuring Charges		$ 3.2