Consolidated Statements Of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Consolidated Statements of Comprehensive Income [Abstract]
Net income	$ 3,515	$ 3,184	$ 7,400	$ 6,523
Foreign currency:
Foreign currency translation adjustment, net of taxes of $136, $1, $126 and $(103)	218	1	174	(185)
Available-for-sale securities:
Net unrealized gains (losses), net of taxes of $2, $0, $(13) and $19	5	1	(21)	34
Reclassification adjustment included in net income, net of taxes of $2, $(2), $0 and $(5)	3	(4)	0	(9)
Cash flow hedges:
Net unrealized gains (losses), net of taxes of $(208), $(52), $(141) and $(242)	(387)	(95)	(263)	(449)
Reclassification adjustment included in net income, net of taxes of $5, $5, $10 and $9	9	10	19	17
Defined benefit postretirement plans:
Amortization of net prior service credit included in net income, net of taxes of $(131), $(131), $(262) and $(262)	(214)	(214)	(429)	(429)
Other comprehensive income (loss)	(366)	(301)	(520)	(1,021)
Total comprehensive income	3,149	2,883	6,880	5,502
Less: Total comprehensive income attributable to noncontrolling interest	(107)	(102)	(189)	(178)
Total Comprehensive Income Attributable to AT&T	$ 3,042	$ 2,781	$ 6,691	$ 5,324