AT&T INC.

0000001 - Document - Document and Entity Information

9952151 - Document - Audit Information

9952152 - Statement - Consolidated Statements Of Income

9952153 - Statement - Consolidated Statements of Comprehensive Income

9952154 - Statement - Consolidated Statements of Comprehensive Income (Parenthetical)

9952155 - Statement - Consolidated Balance Sheets

9952156 - Statement - Consolidated Balance Sheets (Parenthetical)

9952157 - Statement - Consolidated Statements Of Cash Flows

9952158 - Statement - Consolidated Statements Of Changes In Stockholders' Equity

9952159 - Statement - Consolidated Statements Of Changes In Stockholders' Equity (Parenthetical)

9952160 - Disclosure - Summary Of Significant Accounting Policies

9952161 - Disclosure - Earnings Per Share

9952162 - Disclosure - Other Comprehensive Income

9952163 - Disclosure - Segment Information

9952164 - Disclosure - Revenue Recognition

9952165 - Disclosure - Acquisitions, Dispositions And Other Adjustments

9952166 - Disclosure - Property, Plant And Equipment

9952167 - Disclosure - Leases

9952168 - Disclosure - Goodwill And Other Intangible Assets

9952169 - Disclosure - Equity Method Investments

9952170 - Disclosure - Debt

9952171 - Disclosure - Fair Value Measurements And Disclosure

9952172 - Disclosure - Income Taxes

9952173 - Disclosure - Pension And Postretirement Benefits

9952174 - Disclosure - Share-Based Payments

9952175 - Disclosure - Stockholders' and Mezzanine Equity

9952176 - Disclosure - Sales Of Receivables

9952177 - Disclosure - Tower Transaction

9952178 - Disclosure - Transactions With DIRECTV Disclosures

9952179 - Disclosure - FirstNet

9952180 - Disclosure - Contingent Liabilities

9952181 - Disclosure - Supplier and Vendor Financing Programs

9952182 - Disclosure - Additional Financial Information

9952183 - Disclosure - Schedule II - Valuation And Qualifying Accounts

995445 - Disclosure - Insider Trading Arrangements

995550 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure

9955511 - Disclosure - Summary Of Significant Accounting Policies (Policy)

9955512 - Disclosure - Earnings Per Share (Tables)

9955513 - Disclosure - Other Comprehensive Income (Tables)

9955514 - Disclosure - Segment Information (Tables)

9955515 - Disclosure - Revenue Recognition (Tables)

9955516 - Disclosure - Property, Plant And Equipment (Tables)

9955517 - Disclosure - Leases (Tables)

9955518 - Disclosure - Goodwill And Other Intangible Assets (Tables)

9955519 - Disclosure - Equity Method Investments (Tables)

9955520 - Disclosure - Debt (Tables)

9955521 - Disclosure - Fair Value Measurements And Disclosure (Tables)

9955522 - Disclosure - Income Taxes (Tables)

9955523 - Disclosure - Pension And Postretirement Benefits (Tables)

9955524 - Disclosure - Share-Based Payments (Tables)

9955525 - Disclosure - Sales Of Receivables (Tables)

9955526 - Disclosure - Transaction With DIRECTV (Tables)

9955527 - Disclosure - Supplier and Vendor Financing Programs (Tables)

9955528 - Disclosure - Additional Financial Information (Tables)

9955529 - Disclosure - Summary Of Significant Accounting Policies (Narrative) (Details)

9955530 - Disclosure - Earnings Per Share (Details)

9955531 - Disclosure - Other Comprehensive Income (Details)

9955532 - Disclosure - Segment Information (Summary Of Operating Revenues And Expenses By Segment) (Narrative) (Details)

9955533 - Disclosure - Segment Information (Summary Of Operating Revenues And Expenses By Segment) (Details)

9955534 - Disclosure - Segment Information (Reconciliation Of Operating Income (Loss) to Consolidated Statement Of Income) (Details)

9955535 - Disclosure - Segment Information (Schedule of Schedule of Revenues Earned from Customers and Property, Plant and Equipment by Geographical Areas) (Details)

9955536 - Disclosure - Segment Information (Intersegment Assets, Equity Affiliates Investments and Capital Expenditures Details) (Details)

9955537 - Disclosure - Revenue Recognition (Contract with Customer) (Details)

9955538 - Disclosure - Revenue Recognition (Revenue Categories) (Details)

9955539 - Disclosure - Revenue Recognition (Deferred Contract Acquisition and Fulfillment Costs) (Details)

9955540 - Disclosure - Revenue Recognition (Contract Assets and Liabilities) (Details)

9955541 - Disclosure - Revenue Recognition (Remaining Performance Obligations) (Details)

9955542 - Disclosure - Acquisitions, Dispositions And Other Adjustments (Spectrum Auctions Narrative) (Details)

9955543 - Disclosure - Acquisitions, Dispositions And Other Adjustments (Pending Business Acquisition) (Details)

9955544 - Disclosure - Property, Plant And Equipment (Details)

9955545 - Disclosure - Property, Plant And Equipment (Narrative) (Details)

9955546 - Disclosure - Leases (Narrative) (Details)

9955547 - Disclosure - Leases (Components of Lease Expense) (Details)

9955548 - Disclosure - Leases (Supplemental Cash Flow Information Related to Leases) (Details)

9955549 - Disclosure - Leases (Supplemental Balance Sheet Information Related to Leases) (Details)

9955550 - Disclosure - Leases (Future Minimum Maturities of Lease Liabilities) (Details)

9955551 - Disclosure - Goodwill And Other Intangible Assets (Summary Of Changes In Carrying Amount Of Goodwill, By Segment) (Details)

9955552 - Disclosure - Goodwill And Other Intangible Assets (Schedule Of Amortized Intangible Assets) (Details)

9955553 - Disclosure - Goodwill And Other Intangible Assets (Schedule Of Indefinite-Life Intangible Assets Not Subject To Amortization) (Details)

9955554 - Disclosure - Goodwill And Other Intangible Assets (Indefinite-Lived Narrative) (Details)

9955555 - Disclosure - Goodwill And Other Intangible Assets (Narrative) (Details)

9955556 - Disclosure - Goodwill and Other Intangible Assets (Schedule of Amortized Intangible Expenses) (Narrative) (Details)

9955557 - Disclosure - Equity Method Investments (Narrative) (Details)

9955558 - Disclosure - Equity Method Investments (Reconciliation Of Investments In Equity Affiliates) (Details)

9955559 - Disclosure - Debt (Summary Of Long-Term Debt Of AT&T And Its Subsidiaries) (Details)

9955560 - Disclosure - Debt (Schedule of Debt Activity) (Details)

9955561 - Disclosure - Debt (Long-Term Debt - Scheduled Repayments) (Details)

9955562 - Disclosure - Debt (Narrative) (Details)

9955563 - Disclosure - Debt (Financing Activities) (Narrative) (Details)

9955564 - Disclosure - Debt (Credit Facilities) (Narrative) (Details)

9955565 - Disclosure - Fair Value Measurements And Disclosure (Long-Term Debt And Other Financial Instruments) (Details)

9955566 - Disclosure - Fair Value Measurements And Disclosure (Fair Value Leveling) (Details)

9955567 - Disclosure - Fair Value Measurements And Disclosure (Gain and Losses on Equity Securities) (Details)

9955568 - Disclosure - Fair Value Measurements And Disclosure (Narrative) (Details)

9955569 - Disclosure - Fair Value Measurements And Disclosure (Notional Amount Of Our Outstanding Derivative Positions) (Details)

9955570 - Disclosure - Fair Value Measurements And Disclosure (Effect Of Derivatives On The Consolidated Statements Of Income) (Details)

9955571 - Disclosure - Income Taxes (Components Of Deferred Tax Liabilities (Assets)) (Details)

9955572 - Disclosure - Income Taxes (Changes In Unrecognized Tax Benefits Balance For Federal State And Foreign Tax) (Details)

9955573 - Disclosure - Income Taxes (Components of Income Tax Expense (Benefit)) (Details)

9955574 - Disclosure - Income Taxes (Schedule of Income before Income Tax, Domestic and Foreign) (Details)

9955575 - Disclosure - Income Taxes (Reconciliation Of Income Tax Expense (Benefit) Based On Federal Statutory Rate To Amount Per Effective Tax Rate) (Details)

9955576 - Disclosure - Income Taxes (Cash Income Taxes Paid, Net of Amounts Refunded) (Details)

9955577 - Disclosure - Income Taxes (Narrative) (Details)

9955578 - Disclosure - Pension And Postretirement Benefits (Change In The Projected Benefit Obligation) (Details)

9955579 - Disclosure - Pension And Postretirement Benefits (Change In The Value Of Plan Assets And The Plans' Funded Status) (Details)

9955580 - Disclosure - Pension And Postretirement Benefits (Employee Benefit Obligation Amounts Recognized) (Details)

9955581 - Disclosure - Pension And Postretirement Benefits (Net Periodic Benefit Cost (Credit)) (Details)

9955582 - Disclosure - Pension And Postretirement Benefits (Other Changes Recognized in Other Comprehensive Income) (Details)

9955583 - Disclosure - Pension and Postretirement Benefits (Weighted Average Assumptions - Projected Benefit Obligation And Net Pension And Postemployment Benefit Cost) (Details)

9955584 - Disclosure - Pension And Postretirement Benefits (Schedule Of Defined Benefit Plan Targeted And Actual Plan Asset Allocations) (Details)

9955585 - Disclosure - Pension And Postretirement Benefits (Schedule Of Fair Value Of Pension And Postretirement Assets And Liabilities By Level) (Details)

9955586 - Disclosure - Pension And Postretirement Benefits (Fair Value Assets Measured On Recurring Basis Unobservable Input (Level 3) Reconciliation) (Details)

9955587 - Disclosure - Pension And Postretirement Benefits (Estimated Future Benefit Payments) (Details)

9955588 - Disclosure - Pension And Postretirement Benefits (Narrative) (Details)

9955589 - Disclosure - Share-Based Payments (Compensation Cost And Valuation Assumption) (Details)

9955590 - Disclosure - Share-Based Payments (Summary Of Nonvested Stock Units Activity) (Details)

9955591 - Disclosure - Share-Based Payments (Narrative) (Details)

9955592 - Disclosure - Stockholders' and Mezzanine Equity (Narrative) (Details)

9955593 - Disclosure - Stockholders' and Mezzanine Equity (Preferred Interest Narrative) (Details)

9955594 - Disclosure - Sales Of Receivables (Summary of Cash Proceeds Received from Sale of Receivables) (Details)

9955595 - Disclosure - Sales Of Receivables (Equipment Installment and AT&T Revolving Programs) (Details)

9955596 - Disclosure - Sales Of Receivables (Finance Receivables) (Details)

9955597 - Disclosure - Sales Of Receivables (Finance Receivables Repurchased) (Details)

9955598 - Disclosure - Sales Of Receivables (Revolving Receivables Sold) (Details)

9955599 - Disclosure - Sales Of Receivables (Equipment Installment and AT&T Revolving Programs) (Narrative) (Details)

9955600 - Disclosure - Tower Transaction (Narrative) (Details)

9955601 - Disclosure - Transactions With DIRECTV (Equity Income and Cash Distributions) (Details)

9955602 - Disclosure - Transactions With DIRECTV (Narrative) (Details)

9955603 - Disclosure - FirstNet (Narrative) (Details)

9955604 - Disclosure - Contingent Liabilities (Narrative) (Details)

9955605 - Disclosure - Supplier and Vendor Financing Programs (Supplier Financing) (Details)

9955606 - Disclosure - Supplier and Vendor Financing Programs (Vendor Financing) (Details)

9955607 - Disclosure - Additional Financial Information (Consolidated Balance Sheets) (Details)

9955608 - Disclosure - Additional Financial Information (Consolidated Statements Of Income) (Details)

9955609 - Disclosure - Additional Financial Information (Cash and Cash Equivalents and Restricted Cash) (Details)

9955610 - Disclosure - Additional Financial Information (Consolidated Statements Of Cash Flows) (Details)

9955611 - Disclosure - Additional Financial Information (Narrative) (Details)

9955612 - Disclosure - Valuation And Qualifying Accounts (Allowance For Doubtful Accounts) (Details)