Consolidated Statement Of Changes In Stockholders' Equity (USD $) In Millions	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income Attributable to AT&T, net of tax [Member]	Noncontrolling Interest [Member]	Total
Balance at beginning of year at Dec. 31, 2010	$ 6,495	$ 91,731	$ 31,792	$ (21,083)	$ 2,712	$ 303	$ 111,950
Balance at beginning of year (in shares) at Dec. 31, 2010	6,495			(584)
Issuance of treasury shares		122		297
Issuance of treasury shares, (in shares)				14
Share-based payments		(140)
Change related to acquisition of interests held by noncontrolling owners		(26)
Net income attributable to AT&T ($1.18 per diluted share)			6,999				6,999
Dividends to stockholders ($0.86 per share)			(5,091)
Other			(13)
Other comprehensive income attributable to AT&T (see Note 2)					8
Net income attributable to noncontrolling interest						127	127
Distributions						(120)
Acquisition of interests held by noncontrolling owners						(4)
Balance at end of period at Jun. 30, 2011	$ 6,495	$ 91,687	$ 33,687	$ (20,786)	$ 2,720	$ 306	$ 114,109
Balance at end of period (in shares) at Jun. 30, 2011	6,495			(570)