Fair Value Measurements - Additional Information (Detail) (USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available for sale investments, short-term	$ 119,000,000	$ 57,000,000
Available for sale investments, long-term	126,000,000	212,000,000
Gross unrealized gains	2,000,000	2,000,000
Gross unrealized losses	1,000,000	1,000,000
Notional amount of foreign currency derivatives	667,000,000
Net gains (losses) from foreign currency forward contracts	(21,000,000)	(1,000,000)	6,000,000
Foreign Exchange Forward Contracts
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Net forward liability	3,290,000
Net forward asset		1,043,000
Balance held by majority-owned subsidiaries
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Time deposits, held by company's majority-owned subsidiaries	$ 274,000,000	$ 237,000,000

Amount of investment in debt and equity securities categorized neither as trading securities nor held-to-maturity securities and intended be sold or mature one year or operating cycle, if longer.

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Fair value as of the balance sheet date of all foreign currency derivative assets not designated as hedging instruments.

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Aggregate notional amount of foreign currency exchange rate derivatives. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

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Amount of deposits that cannot be withdrawn before a set date without penalty or for which notice of withdrawal is required. Time deposits include, but are not limited to, certificates of deposits, individual retirement accounts and open accounts.

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