|
Commitments and Contingencies - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
|
| Commitments And Contingencies Disclosure [Abstract] | |||
| Total rental expenses | $ 18 | $ 18 | $ 19 |
| Capital leases | 107 | 96 | |
| Outstanding purchase commitments | 126 | ||
| Purchase obligation due | $ 46 | ||