|
Changes in Carrying Amount of Wireless Licenses (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2013
|
Dec. 31, 2012
|
Dec. 31, 2011
|
|
| Indefinite-lived Intangible Assets [Line Items] | |||
| Beginning balance | $ 77,744 | ||
| Capitalized interest on wireless licenses | 754 | 406 | 442 |
| Ending balance | 75,747 | 77,744 | |
|
Wireless Licenses
|
|||
| Indefinite-lived Intangible Assets [Line Items] | |||
| Beginning balance | 77,744 | 73,250 | |
| Acquisitions (Note 2) | 579 | 4,544 | |
| Dispositions (Note 2) | (2,361) | ||
| Capitalized interest on wireless licenses | 566 | 205 | |
| Reclassifications, adjustments and other | (781) | (255) | |
| Ending balance | $ 75,747 | $ 77,744 | |