|
Wireless Licenses Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)
|
12 Months Ended | |
|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|
| Wireless Licenses, Goodwill and Other Intangible Assets [Line Items] | ||
| Wireless licenses under development | $ 4,176,000,000 | $ 4,126,000,000 |
| Average remaining renewal period of wireless license portfolio (in years) | 5 years 1 month 6 days | |
|
Wireless Licenses
|
||
| Wireless Licenses, Goodwill and Other Intangible Assets [Line Items] | ||
| Assets Held-for-sale, Current | 900,000,000 | |
| Wireless licenses under development | $ 7,700,000,000 | $ 7,300,000,000 |