Debt and Lease Commitments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Debt Instrument [Line Items]
Multi-currency revolving credit agreement	$ 400	$ 400
Number of banks involved in multi-year multi-currency revolving credit agreement	8
Revolving credit facility, expiration date	Dec. 12, 2017
Multi-currency revolving credit agreement, maximum amount	500	500
Future minimum payments under non-cancelable operating leases due, total	45.1	45.1
Rent expense, including payments under operating leases		18.3	16.1	13.9
Interest paid including discontinued operations		$ 9.4	$ 11.5	$ 10.5