Consolidated Statements Of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Operating Revenues
Total operating revenues	$ 31,558	$ 30,847	$ 63,064	$ 61,473
Cost of revenues
Other cost of revenues (exclusive of depreciation and amortization shown separately below)	6,306	6,412	12,567	12,751
Selling, general and administrative	7,221	6,945	14,537	14,090
Asset impairments and abandonments and restructuring	286	0	286	504
Depreciation and amortization	4,966	5,251	9,932	10,441
Total operating expenses	24,520	24,346	49,368	49,218
Operating Income	7,038	6,501	13,696	12,255
Other Income (Expense)
Interest expense	(1,883)	(1,655)	(3,696)	(3,313)
Equity in net income (loss) of affiliates	(29)	485	(70)	1,925
Other income (expense) — net	696	767	1,290	1,222
Total other income (expense)	(1,216)	(403)	(2,476)	(166)
Income from Continuing Operations Before Income Taxes	5,822	6,098	11,220	12,089
Income tax expense on continuing operations	784	1,237	1,963	2,536
Income from Continuing Operations	5,038	4,861	9,257	9,553
Loss from discontinued operations, net of tax	(28)	0	(66)	0
Net Income	5,010	4,861	9,191	9,553
Net Income Attributable to Noncontrolling Interest	(383)	(361)	(735)	(702)
Net Income Attributable to AT&T	4,627	4,500	8,456	8,851
Preferred Stock Dividends and Redemption Gain	(36)	(36)	(72)	8
Net Income Attributable to Common Stock	$ 4,591	$ 4,464	$ 8,384	$ 8,859
Basic Earnings Per Share from continuing operations	$ 0.66	$ 0.62	$ 1.21	$ 1.22
Basic Loss Per Share from discontinued operations	0	0	(0.01)	0
Basic Earnings Per Share Attributable to Common Stock	0.66	0.62	1.20	1.22
Diluted Earnings Per Share from continuing operations	0.66	0.62	1.21	1.22
Diluted Loss Per Share from discontinued operations	0	0	(0.01)	0
Diluted Earnings Per Share Attributable to Common Stock	$ 0.66	$ 0.62	$ 1.20	$ 1.22
Weighted Average Number of Common Shares Outstanding - Basic (in millions) (in shares)	6,938	7,209	6,977	7,211
Weighted Average Number of Common Shares Outstanding - with Dilution (in millions) (in shares)	6,946	7,219	6,987	7,221
Service
Operating Revenues
Total operating revenues	$ 25,977	$ 25,292	$ 51,455	$ 50,430
Equipment
Operating Revenues
Total operating revenues	5,581	5,555	11,609	11,043
Cost of revenues
Equipment	$ 5,741	$ 5,738	$ 12,046	$ 11,432

Consolidated Statements Of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Operating Activities
Income from Continuing Operations	$ 9,257	$ 9,553
Adjustments to reconcile income from continuing operations to net cash provided by operating activities from continuing operations:
Depreciation and amortization	9,932	10,441
Provision for uncollectible accounts	1,149	1,037
Asset impairments and abandonments and restructuring	286	504
Pension and postretirement benefit expense (credit)	(791)	(794)
Net (gain) loss on investments	(170)	(31)
Changes in operating assets and liabilities:
Receivables	(418)	(247)
Equipment installment receivables and related sales	(176)	1,115
Contract asset and cost deferral	(464)	(299)
Inventories, prepaid and other current assets	320	(317)
Accounts payable and other accrued liabilities	(2,565)	(4,440)
Changes in income taxes	1,829	1,663
Postretirement claims and contributions	(264)	(103)
Other - net	471	730
Total adjustments	9,139	9,259
Net Cash Provided by Operating Activities from Continuing Operations	18,396	18,812
Investing Activities
Capital expenditures	(10,577)	(9,174)
Acquisitions, net of cash acquired	(2,725)	(48)
Dispositions	747	40
(Purchases), sales and settlements of securities and investments, net	(24)	(1,084)
Other - net	(654)	(778)
Net Cash Used in Investing Activities from Continuing Operations	(13,233)	(11,044)
Financing Activities
Issuance of long-term debt	14,037	6,429
Repayment of long-term debt	(5,398)	(1,620)
Payment of vendor financing	(643)	(423)
Redemption of preferred stock	0	(2,075)
Purchase of treasury stock	(4,669)	(1,179)
Issuance of treasury stock	1	17
Issuance of preferred interests in subsidiary	0	2,221
Dividends paid	(3,973)	(4,135)
Other - net	(772)	167
Net Cash Used in Financing Activities from Continuing Operations	(1,417)	(598)
Net increase in cash and cash equivalents and restricted cash from continuing operations	3,746	7,170
Cash Flows from Discontinued Operations:
Cash provided by operating activities	31	0
Cash used in investing activities	(4,363)	0
Cash used in financing activities	0	0
Net increase (decrease) in cash and cash equivalents and restricted cash from discontinued operations	(4,332)	0
Net increase (decrease) in cash and cash equivalents and restricted cash from discontinued operations	(586)	7,170
Cash and cash equivalents and restricted cash beginning of year	18,527	3,406
Cash and Cash Equivalents and Restricted Cash End of Period	$ 17,941	$ 10,576

Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Current Assets
Cash and cash equivalents	$ 17,570	$ 18,234
Accounts receivable – net of related allowances for credit loss of $372 and $429	8,521	8,843
Inventories	2,368	2,420
Prepaid and other current assets	23,375	19,235
Total current assets	51,834	48,732
Property, plant and equipment	352,703	347,570
Less: accumulated depreciation and amortization	(218,488)	(216,011)
Property, Plant and Equipment – Net	134,215	131,559
Goodwill – Net	63,865	63,425
Licenses – Net	129,123	128,148
Other Intangible Assets – Net	6,063	5,254
Investments in and Advances to Equity Affiliates	1,130	1,106
Operating Lease Right-Of-Use Assets	22,781	22,642
Other Assets	19,348	19,332
Total Assets	428,359	420,198
Current Liabilities
Debt maturing within one year	9,323	9,011
Accounts payable and accrued liabilities	38,049	38,514
Advanced billings and customer deposits	4,065	4,266
Dividends payable	1,945	1,989
Total current liabilities	53,382	53,780
Long-Term Debt	134,631	127,089
Deferred Credits and Other Noncurrent Liabilities
Noncurrent deferred tax liabilities	60,401	58,312
Postemployment benefit obligation	8,267	8,478
Operating lease liabilities	18,934	18,943
Other noncurrent liabilities	24,305	25,104
Total deferred credits and other noncurrent liabilities	111,907	110,837
Redeemable Noncontrolling Interest, Equity, Carrying Amount [Abstract]
Redeemable Noncontrolling Interest	2,005	2,001
Stockholders’ Equity
Common stock ($1 par value, 14,000,000,000 authorized at June 30, 2026 and December 31, 2025: issued 7,620,748,598 at June 30, 2026 and December 31, 2025)	7,621	7,621
Additional paid-in capital	106,161	106,533
Retained earnings	20,293	15,768
Treasury stock (741,978,242 at June 30, 2026 and 583,246,242 at December 31, 2025, at cost)	(22,446)	(18,529)
Accumulated other comprehensive income (loss)	(1,185)	(860)
Noncontrolling interest	15,990	15,958
Total stockholders’ equity	126,434	126,491
Total Liabilities and Stockholders’ Equity	428,359	420,198
Series A (48,000 issued and outstanding at June 30, 2026 and December 31, 2025)
Stockholders’ Equity
Preferred stock ($1 par value, 10,000,000 authorized at June 30, 2026 and December 31, 2025):	0	0
Series B (0 issued and outstanding at June 30, 2026 and 20,000 issued and 0 outstanding at December 31, 2025)
Stockholders’ Equity
Preferred stock ($1 par value, 10,000,000 authorized at June 30, 2026 and December 31, 2025):	0	0
Series C (70,000 issued and outstanding at June 30, 2026 and December 31, 2025)
Stockholders’ Equity
Preferred stock ($1 par value, 10,000,000 authorized at June 30, 2026 and December 31, 2025):	$ 0	$ 0