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Earnings Per Share (Tables)
9 Months Ended
Sep. 30, 2015
Earnings Per Share  
Reconciliation Of The Numerators And Denominators Of Basic Earnings Per Share And Diluted Earnings Per Share
 Three months ended Nine months ended
 September 30, September 30,
 2015 2014 2015 2014
Numerators           
Numerator for basic earnings per share:           
Net Income$3,078 $3,187 $9,601 $10,654
Less: Net income attributable to noncontrolling interest (84)  (57)  (262)  (213)
Net Income attributable to AT&T 2,994  3,130  9,339  10,441
Dilutive potential common shares:           
Share-based payment 3  2  9  9
Numerator for diluted earnings per share$2,997 $3,132 $9,348 $10,450
Denominators (000,000)           
Denominator for basic earnings per share:           
Weighted average number of common shares outstanding 5,924  5,198  5,447  5,208
Dilutive potential common shares:           
Share-based payment (in shares) 19  16  16  16
Denominator for diluted earnings per share 5,943  5,214  5,463  5,224
Basic earnings per share attributable to AT&T$0.50 $0.60 $1.71 $2.00
Diluted earnings per share attributable to AT&T$0.50 $0.60 $1.71 $2.00