Consolidated Statements Of Income - USD ($) $ in Millions	12 Months Ended
Consolidated Statements Of Income - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Operating Revenues
Total operating revenues	$ 125,648	$ 122,336	$ 122,428
Cost of revenues
Other cost of revenues (exclusive of depreciation and amortization shown separately below)	25,424	26,972	26,987
Selling, general and administrative	28,942	28,411	28,874
Asset impairments and abandonments and restructuring	838	5,075	1,193
Depreciation and amortization	20,886	20,580	18,777
Total operating expenses	101,486	103,287	98,967
Operating Income (Loss)	24,162	19,049	23,461
Other Income (Expense)
Interest expense	(6,804)	(6,759)	(6,704)
Equity in net income of affiliates	1,895	1,989	1,675
Other income (expense) – net	7,754	2,419	1,416
Total other income (expense)	2,845	(2,351)	(3,613)
Income Before Income Taxes	27,007	16,698	19,848
Income tax expense	3,621	4,445	4,225
Income (Loss) from Continuing Operations	23,386	12,253	15,623
Net Income	23,386	12,253	15,623
Less: Net Income Attributable to Noncontrolling Interest	(1,433)	(1,305)	(1,223)
Net Income Attributable to AT&T	21,953	10,948	14,400
Less: Preferred Stock Dividends and Redemption Gain	(64)	(202)	(208)
Net Income Attributable to Common Stock	$ 21,889	$ 10,746	$ 14,192
Basic Earnings Per Share Attributable to Common Stock	$ 3.04	$ 1.49	$ 1.97
Diluted Earnings Per Share Attributable to Common Stock	$ 3.04	$ 1.49	$ 1.97
Service
Operating Revenues
Total operating revenues	$ 101,158	$ 100,135	$ 99,649
Equipment
Operating Revenues
Total operating revenues	24,490	22,201	22,779
Cost of revenues
Equipment	$ 25,396	$ 22,249	$ 23,136

Consolidated Statements Of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Operating Activities
Net income	$ 23,386	$ 12,253	$ 15,623
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	20,886	20,580	18,777
Provision for uncollectible accounts	2,271	1,969	1,969
Asset impairments and abandonments and restructuring	838	5,075	1,193
Pension and postretirement benefit expense (credit)	(1,588)	(1,883)	(2,552)
Actuarial and settlement (gain) loss on pension and postretirement benefits – net	519	56	1,594
Net (gain) loss on investments	(5,889)	80	441
Changes in operating assets and liabilities:
Receivables	(1,526)	123	82
Equipment installment receivables and related sales	324	(1,846)	(133)
Contract asset and cost deferral	(1,208)	160	(1,006)
Inventories, prepaid and other current assets	(460)	70	747
Accounts payable and other accrued liabilities	884	(1,104)	(1,574)
Changes in income taxes	2,226	1,978	2,618
Postretirement claims and contributions	(1,436)	(166)	(735)
Other – net	1,057	1,426	1,270
Total adjustments	16,898	26,518	22,691
Net Cash Provided by Operating Activities	40,284	38,771	38,314
Investing Activities
Capital expenditures	(20,842)	(20,263)	(17,853)
Acquisitions, net of cash acquired	(379)	(380)	(2,942)
Dispositions	3,218	75	72
Distributions from DIRECTV in excess of cumulative equity in earnings	0	928	2,049
(Purchases), sales and settlement of securities and investments, net	181	2,575	(902)
Other – net	(955)	(425)	(84)
Net Cash Used in Investing Activities	(18,777)	(17,490)	(19,660)
Financing Activities
Net change in short-term borrowings with original maturities of three months or less	0	0	(914)
Issuance of other short-term borrowings	0	491	5,406
Repayment of other short-term borrowings	0	(2,487)	(3,415)
Proceeds from Issuance of Long-Term Debt	14,027	19	10,004
Repayment of long-term debt	(5,528)	(10,297)	(12,044)
Note payable to DIRECTV, net of payments	0	0	(130)
Payment of vendor financing	(1,181)	(1,792)	(5,742)
Redemption of preferred stock	(2,075)	0	0
Purchase of treasury stock	(4,500)	(215)	(194)
Issuance of treasury stock	21	15	3
Issuance of preferred interests in subsidiary	2,221	0	7,151
Redemption of preferred interests in subsidiary	(65)	0	(5,333)
Dividends paid	(8,180)	(8,208)	(8,136)
Other – net	(1,126)	(2,234)	(2,270)
Net Cash Used in Financing Activities	(6,386)	(24,708)	(15,614)
Cash Provided by (Used in) Discontinued Operation [Abstract]
Net increase (decrease) in cash and cash equivalents and restricted cash	15,121	(3,427)	3,040
Cash and cash equivalents and restricted cash beginning of year	3,406	6,833	3,793
Cash and Cash Equivalents and Restricted Cash End of Year	$ 18,527	$ 3,406	$ 6,833

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Current Assets
Cash and cash equivalents	$ 18,234	$ 3,298
Accounts receivable – net of related allowance for credit loss of $429 and $375	8,843	9,638
Inventories	2,420	2,270
Prepaid and other current assets	19,235	15,962
Total current assets	48,732	31,168
Property, Plant and Equipment – Net	131,559	128,871
Goodwill – Net	63,425	63,432
Licenses – Net	128,148	127,035
Other Intangible Assets – Net	5,254	5,255
Investments in and Advances to Equity Affiliates	1,106	295
Operating Lease Right-Of-Use Assets	22,642	20,909
Other Assets	19,332	17,830
Total Assets	420,198	394,795
Current Liabilities
Debt maturing within one year	9,011	5,089
Accounts payable and accrued liabilities	38,514	35,657
Advanced billings and customer deposits	4,266	4,099
Dividends payable	1,989	2,027
Total current liabilities	53,780	46,872
Long-Term Debt	127,089	118,443
Deferred Credits and Other Noncurrent Liabilities
Noncurrent deferred tax liabilities	58,312	58,939
Postemployment benefit obligation	8,478	9,025
Operating lease liabilities	18,943	17,391
Other noncurrent liabilities	25,104	23,900
Total deferred credits and other noncurrent liabilities	110,837	109,255
Redeemable Noncontrolling Interest, Equity, Carrying Amount [Abstract]
Redeemable Noncontrolling Interest	2,001	1,980
Stockholders’ Equity
Common stock ($1 par value, 14,000,000,000 authorized at December 31, 2025 and December 31, 2024: issued 7,620,748,598 at December 31, 2025 and December 31, 2024)	7,621	7,621
Additional paid-in capital	106,533	109,108
Retained earnings	15,768	1,871
Treasury stock (583,246,242 at December 31, 2025 and 444,853,148 at December 31, 2024, at cost)	(18,529)	(15,023)
Accumulated other comprehensive income (loss)	(860)	795
Noncontrolling interest	15,958	13,873
Total stockholders’ equity	126,491	118,245
Total Liabilities and Stockholders’ Equity	420,198	394,795
Series A (48,000 issued and outstanding at December 31, 2025 and December 31, 2024)
Stockholders’ Equity
Preferred stock ($1 par value, 10,000,000 authorized at December 31, 2025 and December 31, 2024):	0	0
Series B (20,000 issued and 0 outstanding at December 31, 2025 and 20,000 issued and outstanding at December 31, 2024)
Stockholders’ Equity
Preferred stock ($1 par value, 10,000,000 authorized at December 31, 2025 and December 31, 2024):	0	0
Series C (70,000 issued and outstanding at December 31, 2025 and December 31, 2024)
Stockholders’ Equity
Preferred stock ($1 par value, 10,000,000 authorized at December 31, 2025 and December 31, 2024):	$ 0	$ 0