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Consolidated Statement Of Changes In Stockholders' Equity (Parenthetical) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Consolidated Statements Of Changes In Stockholders' Equity (Unaudited)        
Net income attributable to AT&T, per diluted share $ 0.58 $ 0.72 $ 1.95 $ 2.09
Dividends to stockholders, per share $ 0.46 $ 0.45 $ 1.38 $ 1.35