Segment Information (Summary Of Operating Revenues And Expenses) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Revenues	$ 30,043	$ 31,326	$ 89,398	$ 102,943
Operations and Support Expenses	19,517	20,632	59,467	68,588
EBITDA	10,526	10,694	29,931	34,355
Depreciation and Amortization	4,514	4,457	13,426	13,352
Operating Income (Loss)	6,012	6,237	16,505	21,003
Operating Segments
Segment Reporting Information [Line Items]
Revenues	29,916	28,942	88,985	86,567
Operations and Support Expenses	18,000	17,633	54,429	52,272
EBITDA	11,916	11,309	34,556	34,295
Depreciation and Amortization	4,348	4,271	12,917	12,705
Operating Income (Loss)	7,568	7,038	21,639	21,590
Total Corporate
Segment Reporting Information [Line Items]
Revenues	127	188	413	546
Operations and Support Expenses	598	476	1,774	1,430
EBITDA	(471)	(288)	(1,361)	(884)
Depreciation and Amortization	150	114	449	149
Operating Income (Loss)	(621)	(402)	(1,810)	(1,033)
DTV-related retained costs
Segment Reporting Information [Line Items]
Revenues	0	20	8	20
Operations and Support Expenses		69		69
EBITDA	(197)	(49)	(524)	(49)
Depreciation and Amortization	139	92	408	92
Operating Income (Loss)	(336)	(141)	(932)	(141)
Parent Administration Support
Segment Reporting Information [Line Items]
Revenues	(6)	0	(24)	(12)
Operations and Support Expenses	266	360	873	1,147
EBITDA	(272)	(360)	(897)	(1,159)
Depreciation and Amortization	2	12	12	27
Operating Income (Loss)	(274)	(372)	(909)	(1,186)
Securitization Fees
Segment Reporting Information [Line Items]
Revenues	15	16	48	44
Operations and Support Expenses	103	1	263	53
EBITDA	(88)	15	(215)	(9)
Depreciation and Amortization	0	0	0	0
Operating Income (Loss)	(88)	15	(215)	(9)
Value Portfolio
Segment Reporting Information [Line Items]
Revenues	118	152	381	494
Operations and Support Expenses	32	46	106	161
EBITDA	86	106	275	333
Depreciation and Amortization	9	10	29	30
Operating Income (Loss)	77	96	246	303
Video
Segment Reporting Information [Line Items]
Revenues		2,149		15,513
Operations and Support Expenses		1,731		12,666
EBITDA		418		2,847
Depreciation and Amortization		44		356
Operating Income (Loss)	0	374	0	2,491
Held-for-sale and other reclassifications
Segment Reporting Information [Line Items]
Revenues		64		453
Operations and Support Expenses		31		306
EBITDA		33		147
Depreciation and Amortization		0		0
Operating Income (Loss)	0	33	0	147
Reclassification of prior service credits
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Operations and Support Expenses	731	670	1,961	2,011
EBITDA	(731)	(670)	(1,961)	(2,011)
Depreciation and Amortization	0	0	0	0
Operating Income (Loss)	(731)	(670)	(1,961)	(2,011)
Merger & Significant Items
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Operations and Support Expenses	188	108	1,303	39
EBITDA	(188)	(108)	(1,303)	(39)
Depreciation and Amortization	16	28	60	142
Operating Income (Loss)	(204)	(136)	(1,363)	(181)
Total Corporate and Other
Segment Reporting Information [Line Items]
Revenues	127	2,384	413	16,376
Operations and Support Expenses	1,517	2,999	5,038	16,316
EBITDA	(1,390)	(615)	(4,625)	60
Depreciation and Amortization	166	186	509	647
Operating Income (Loss)	(1,556)	(801)	(5,134)	(587)
Eliminations and consolidations
Segment Reporting Information [Line Items]
Revenues	0	(17)	0	(136)
Operations and Support Expenses		(17)		(136)
EBITDA		0		0
Depreciation and Amortization		0		0
Operating Income (Loss)		0		0
Communications | Operating Segments
Segment Reporting Information [Line Items]
Revenues	29,131	28,218	86,702	84,524
Operations and Support Expenses	17,316	16,936	52,393	50,288
EBITDA	11,815	11,282	34,309	34,236
Depreciation and Amortization	4,184	4,114	12,423	12,253
Operating Income (Loss)	7,631	7,168	21,886	21,983
Communications | Mobility | Operating Segments
Segment Reporting Information [Line Items]
Revenues	20,278	19,138	60,279	57,108
Operations and Support Expenses	11,817	11,116	35,677	32,998
EBITDA	8,461	8,022	24,602	24,110
Depreciation and Amortization	2,042	2,035	6,118	6,072
Operating Income (Loss)	6,419	5,987	18,484	18,038
Communications | Business Wireline | Operating Segments
Segment Reporting Information [Line Items]
Revenues	5,668	5,938	16,903	18,036
Operations and Support Expenses	3,444	3,632	10,498	11,010
EBITDA	2,224	2,306	6,405	7,026
Depreciation and Amortization	1,342	1,304	3,954	3,875
Operating Income (Loss)	882	1,002	2,451	3,151
Communications | Consumer Wireline | Operating Segments
Segment Reporting Information [Line Items]
Revenues	3,185	3,142	9,520	9,380
Operations and Support Expenses	2,055	2,188	6,218	6,280
EBITDA	1,130	954	3,302	3,100
Depreciation and Amortization	800	775	2,351	2,306
Operating Income (Loss)	330	179	951	794
Latin America - Mexico | Operating Segments
Segment Reporting Information [Line Items]
Revenues	785	724	2,283	2,043
Operations and Support Expenses	684	697	2,036	1,984
EBITDA	101	27	247	59
Depreciation and Amortization	164	157	494	452
Operating Income (Loss)	$ (63)	$ (130)	$ (247)	$ (393)