Consolidated Statement Of Changes In Stockholders' Equity (Parenthetical) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Consolidated Statements Of Changes In Stockholders' Equity (Unaudited)
Net income attributable to AT&T, per diluted share	$ 0.50	$ 0.65	$ 1.57	$ 2.19
Dividends to stockholders, per share	$ 0.51	$ 0.50	$ 1.53	$ 1.50