Contingent Liabilities - Additional Information (Detail) In Millions, unless otherwise specified	1 Months Ended	9 Months Ended	1 Months Ended		12 Months Ended
	Jun. 06, 2012 USD ($)	Sep. 30, 2013 Defendant Employee	Feb. 29, 2012 Normandy Precision Components Case USD ($)	Feb. 29, 2012 Normandy Precision Components Case EUR (€)	Dec. 31, 2009 Normandy Precision Components Case USD ($)	Dec. 31, 2009 Normandy Precision Components Case EUR (€)	Sep. 30, 2013 United States District Court for Eastern District of Michigan Defendant	Sep. 30, 2013 Ontario and Quebec Superior Court Defendant
Commitments and Contingencies Disclosure [Line Items]
Damages sought					$ 16	€ 12
Damages awarded			7.5	5.6
Damages paid value				5.6
Total additional to be paid			1.3	1.0
Cash paid for litigation settlements	$ 14.5
Number of employees impacted		3
Number of defendants in antitrust class actions		16
Number of pending antitrust class actions							13	3