|
Revenue by Geographic Area (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
Jun. 30, 2012
|
Jun. 30, 2011
|
Jun. 30, 2012
|
Jun. 30, 2011
|
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| Segment Reporting, Revenue Reconciling Item [Line Items] | ||||||||||
| Revenue | $ 1,184 | $ 895 | $ 2,242 | $ 1,626 | ||||||
|
UNITED STATES
|
||||||||||
| Segment Reporting, Revenue Reconciling Item [Line Items] | ||||||||||
| Revenue | 588 | 515 | 1,124 | 942 | ||||||
|
Rest of World
|
||||||||||
| Segment Reporting, Revenue Reconciling Item [Line Items] | ||||||||||
| Revenue | $ 596 | [1] | $ 380 | [1] | $ 1,118 | [1] | $ 684 | [1] | ||
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