|
Changes in Carrying Amount of Goodwill (Detail) (USD $)
In Millions, unless otherwise specified |
6 Months Ended |
|---|---|
|
Jun. 30, 2014
|
|
| Goodwill [Line Items] | |
| Beginning balance | $ 24,634 |
| Acquisitions and other (Note 2) | 29 |
| Ending balance | 24,663 |
|
Wireless
|
|
| Goodwill [Line Items] | |
| Beginning balance | 18,376 |
| Acquisitions and other (Note 2) | 15 |
| Ending balance | 18,391 |
|
Wireline
|
|
| Goodwill [Line Items] | |
| Beginning balance | 6,258 |
| Acquisitions and other (Note 2) | 14 |
| Ending balance | $ 6,272 |