Schedule II - Valuation and Qualifying Accounts and Reserves (Parenthetical) (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Valuation and Qualifying Accounts Disclosure [Line Items]
Deferred tax assets, foreign net operating loss carryforwards	$ 74
Allowance for doubtful accounts	$ 2.1	$ 2.1	$ 2.1