Segment Information - Additional Information (Detail) $ in Millions |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2016
USD ($)
Segment
|
Mar. 31, 2015
USD ($)
|
|
| Segment Reporting Information [Line Items] | ||
| Number of reportable segments | Segment | 2 | |
| Segment reporting information, revenue | $ 32,171 | $ 31,984 |
| Number of customers individually accounting for more than ten percent of total operating revenues | No single customer accounted for more than 10% of our total operating revenues during the three months ended March 31, 2016 and 2015. | |
| Wireline | ||
| Segment Reporting Information [Line Items] | ||
| Segment reporting information, revenue | $ 9,290 | 9,469 |
| Fios revenues | Wireline | ||
| Segment Reporting Information [Line Items] | ||
| Segment reporting information, revenue | $ 3,500 | $ 3,400 |