|
Other Current Assets - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
9 Months Ended | 12 Months Ended |
|---|---|---|
|
Sep. 30, 2013
|
Dec. 31, 2012
|
|
| Prepaid Expense And Other Assets Current [Abstract] | ||
| Other current assets reclassified as customer loyalty payments within other intangible assets | $ 50 | |
| Assets held for sale | 12 months |