Earnings Per Share (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Numerator for basic earnings per share:
Income from Continuing Operations	$ 4,453	$ 5,149
Net income from continuing operations attributable to noncontrolling interests	(225)	(354)
Less: Preferred Stock Dividends	(52)	(48)
Income from continuing operations attributable to common stock	4,176	4,747
Income from discontinued operations, net of tax	0	15
Income from discontinued operations attributable to common stock	0	15
Net Income Attributable to Common Stock	4,176	4,762
Dilutive potential common shares:
Numerator for diluted earnings per share	$ 4,252	$ 4,908
Denominator for basic earnings per share:
Weighted average number of common shares outstanding (in shares)	7,168	7,184
Dilutive potential common shares:
Denominator for diluted earnings per share (in shares)	7,474	7,556
AT&T Mobility II, LLC preferred interest conversion
Dilutive potential common shares:
Share-based payment	$ 72	$ 140
Dilutive potential common shares:
Share-based payment (in shares)	284	337
Other AT&T units
Dilutive potential common shares:
Share-based payment	$ 4	$ 6
Dilutive potential common shares:
Share-based payment (in shares)	22	35