Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 4,453	$ 5,164
Foreign currency:
Translation adjustment, net of taxes of $52 and $5	193	19
Securities:
Net unrealized gains (losses), net of taxes of $8 and $(23)	23	(69)
Reclassification adjustment included in net income, net of taxes of $1 and $1	3	3
Derivative instruments:
Net unrealized gains (losses), net of taxes of $(43) and $69	(152)	258
Reclassification adjustment included in net income, net of taxes of $3 and $4	12	15
Defined benefit postretirement plans:
Amortization of net prior service credit included in net income, net of taxes of $(160) and $(152)	(491)	(465)
Other comprehensive income (loss)	(412)	(239)
Total comprehensive income	4,041	4,925
Less: Total comprehensive income attributable to noncontrolling interest	(225)	(354)
Total Comprehensive Income Attributable to AT&T	$ 3,816	$ 4,571