|
Property and Equipment (Detail) (USD $)
In Millions, unless otherwise specified |
Jun. 30, 2012
|
Dec. 31, 2011
|
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | $ 2,734 | $ 1,925 |
| Less accumulated depreciation and amortization | (629) | (450) |
| Property and equipment, net | 2,105 | 1,475 |
|
Network Equipment
|
||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 1,479 | 1,016 |
|
Land
|
||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 34 | 34 |
|
Buildings
|
||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 449 | 355 |
|
Leasehold Improvements
|
||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 142 | 120 |
|
Computer software, office equipment and other
|
||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | 88 | 73 |
|
Construction in Progress
|
||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, gross | $ 542 | $ 327 |