|
Property and Equipment, Net - Summary of Property and Equipment (Detail) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2013
|
Dec. 31, 2012
|
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Cost | $ 1,024 | $ 947 |
| Accumulated depreciation | (596) | (531) |
| Net | 428 | 416 |
|
Capitalized software [Member]
|
||
| Property, Plant and Equipment [Line Items] | ||
| Cost | 650 | 629 |
| Accumulated depreciation | (449) | (386) |
| Net | 201 | 243 |
|
Computer equipment [Member]
|
||
| Property, Plant and Equipment [Line Items] | ||
| Cost | 281 | 274 |
| Accumulated depreciation | (139) | (138) |
| Net | 142 | 136 |
|
Building and leasehold improvements [Member]
|
||
| Property, Plant and Equipment [Line Items] | ||
| Cost | 17 | 12 |
| Accumulated depreciation | (8) | (7) |
| Net | 9 | 5 |
|
Construction in progress [Member]
|
||
| Property, Plant and Equipment [Line Items] | ||
| Cost | 76 | 32 |
| Accumulated depreciation | ||
| Net | $ 76 | $ 32 |