Pension And Other Postretirement Benefits Liabilities - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected additional pension and other postretirement benefit contributions	$ 2.8
Unfunded Defined Benefit Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected additional pension and other postretirement benefit contributions	1.0
Matching Contributions To 401(k) Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected additional pension and other postretirement benefit contributions	0.9
Non U.S. Defined Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected additional pension and other postretirement benefit contributions	0.9
U.S. Defined Benefit Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Expected additional pension and other postretirement benefit contributions	$ 0