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Derivative instruments (Details 3) (Foreign currency contracts [Member], Interest and other income, net [Member], USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Sep. 30, 2012
|
Sep. 30, 2011
|
Sep. 30, 2012
|
Sep. 30, 2011
|
|
|
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 | ||||
| Amount of gain (loss) recognized in interest and other income, net | $ 3 | $ 50 | $ 13 | $ (10) |