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Derivative instruments (Details 3) (Foreign currency contracts [Member], Interest and other income, net [Member], USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2012
|
Dec. 31, 2011
|
Dec. 31, 2010
|
|
|
Foreign currency contracts [Member] | Interest and other income, net [Member]
|
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| Location in the Condensed Consolidated Statements of Income and the amount of gain (loss) recognized in earnings for our derivative instruments not designated as hedging instruments | |||
| Derivatives not designated as hedging instruments | $ 19 | $ (1) | $ 32 |