|
Long-Term Debt - Summary of Movement in Deferred Financing Costs (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
|
| Debt Disclosure [Abstract] | |||
| Balance as of January 1 | $ 74 | $ 98 | $ 37 |
| Capitalization of debt finance costs | 29 | 13 | 84 |
| Amortization | (24) | (37) | (23) |
| Written-off as loss on extinguishment | (39) | ||
| Balance as of December 31 | $ 40 | $ 74 | $ 98 |