Debt and Capital Leases - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended	12 Months Ended	9 Months Ended	1 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Top Tier Foreign Subsidiaries [Member]	May 31, 2011 Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit facility				$ 130
Additional credit facility				50
Credit facility, period				5 years
Credit facility expiring				May 18, 2016
Letters of credit				50
Capital stock of top-tier foreign subsidiaries			65.00%
Capital lease obligations, total	1.7	2.2
Remaining borrowing capacity	128.2
Outstanding letters of credit	1.8
The fees on the unused portion of the Credit Facility	0.35%
Share repurchases		10
Percentage of repurchases of shares		1.50
Dividends declared and paid		ten
Estimated fair value of total debt	$ 1.7	$ 2.1