Consolidated Statement Of Changes In Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Consolidated Statements Of Changes In Stockholders' Equity (Unaudited)
Net income attributable to AT&T, per diluted share	$ 0.65	$ 0.49	$ 2.19	$ 1.69
Dividends to stockholders, per share	$ 0.5	$ 0.49	$ 1.5	$ 1.47