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Acquisitions, Divestitures, Collaborative Arrangements and Equity-Method Investments - Collaborative Arrangements (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2009
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| Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items] | |||
| Upfront payments and milestone payments | $ 210 | $ 147 | $ 150 |