Segment Information (Reconciliation Of Operating Income Loss to Consolidated Statement Of Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]
Operating Income (Loss)	$ 5,923	$ 5,607	$ 17,253	$ 17,681
Interest Expense	1,146	1,016	2,977	2,757
Equity in net income (loss) of affiliates	15	(2)	48	188
Other income (expense) - net	(57)	42	61	1,456
Income Before Income Taxes	4,735	4,631	14,385	16,568
Operating Segments [Member] | Business Solutions [Member]
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]
Operating Income (Loss)	4,297	3,861	12,671	12,032
Equity in net income (loss) of affiliates	0	0	0	0
Income Before Income Taxes	4,297	3,861	12,671	12,032
Operating Segments [Member] | Entertainment And Internet Services [Member]
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]
Operating Income (Loss)	1,019	(337)	559	(938)
Equity in net income (loss) of affiliates	2	0	(16)	0
Income Before Income Taxes	1,021	(337)	543	(938)
Operating Segments [Member] | Consumer Mobility [Member]
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]
Operating Income (Loss)	2,743	2,527	7,597	7,228
Equity in net income (loss) of affiliates	0	(1)	0	(1)
Income Before Income Taxes	2,743	2,526	7,597	7,227
Operating Segments [Member] | International [Member]
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]
Operating Income (Loss)	(83)	0	(224)	0
Equity in net income (loss) of affiliates	(4)	0	(4)	153
Income Before Income Taxes	(87)	0	(228)	153
Operating Segments [Member] | Segment Contribution [Member]
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]
Operating Income (Loss)	7,976	6,051	20,603	18,322
Equity in net income (loss) of affiliates	(2)	(1)	(20)	152
Income Before Income Taxes	7,974	6,050	20,583	18,474
Reconciling Items [Member] | Corporate and Other [Member]
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]
Operating Income (Loss)	(2)	(106)	152	140
Reconciling Items [Member] | Merger and intergration charges [Member]
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]
Operating Income (Loss)	(696)	(213)	(1,689)	(403)
Reconciling Items [Member] | Amortization of intangibles acquired [Member]
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]
Operating Income (Loss)	(1,198)	(125)	(1,439)	(378)
Reconciling Items [Member] | Employee separate charges [Member]
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]
Operating Income (Loss)	(122)	0	(339)	0
Reconciling Items [Member] | Other (expense) credits [Member]
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]
Operating Income (Loss)	(35)	0	(35)	0
Reconciling Items [Member] | Less: segment equity in net income (loss) of affiliates [Member]
Segment Reporting Reconciling Item For Operating Income (Loss) From Segment To Consolidated Statements Of Income [Line Items]
Operating Income (Loss)	$ 2	$ 1	$ 20	$ (152)