| Year Ended December 31, | 2013 | | 2012 | | 2011 | |
| Numerators | | | | | | | | | |
| Numerator for basic earnings per share: | | | | | | | | | |
| Net income | $ | 18,553 | | $ | 7,539 | | $ | 4,184 | |
| Net income attributable to noncontrolling interest | | (304) | | | (275) | | | (240) | |
| Net income attributable to AT&T | | 18,249 | | | 7,264 | | | 3,944 | |
| Dilutive potential common shares: | | | | | | | | | |
| Share-based payment | | 12 | | | 12 | | | 11 | |
| Numerator for diluted earnings per share | $ | 18,261 | | $ | 7,276 | | $ | 3,955 | |
| Denominators (000,000) | | | | | | | | | |
| Denominator for basic earnings per share: | | | | | | | | | |
| Weighted-average number of common shares outstanding | | 5,368 | | | 5,801 | | | 5,928 | |
| Dilutive potential common shares: | | | | | | | | | |
| Share-based payment (in shares) | | 17 | | | 20 | | | 22 | |
| Denominator for diluted earnings per share | | 5,385 | | | 5,821 | | | 5,950 | |
| Basic earnings per share attributable to AT&T | $ | 3.39 | | $ | 1.25 | | $ | 0.66 | |
| Diluted earnings per share attributable to AT&T | $ | 3.39 | | $ | 1.25 | | $ | 0.66 | |
