Preparation Of Interim Financial Statements (Policies)	3 Months Ended
Mar. 31, 2023
Accounting Policies [Abstract]
Principles of Consolidation [Policy Text Block]	All significant intercompany transactions are eliminated in the consolidation process. Investments in subsidiaries and partnerships which we do not control but have significant influence are accounted for under the equity method. Earnings from certain investments accounted for using the equity method are included in our results on a one quarter lag. We also record our proportionate share of our equity method investees’ other comprehensive income (OCI) items, including translation adjustments.
Basis of Accounting [Policy Text Block]	The preparation of financial statements in conformity with U.S. generally accepted accounting principles (GAAP) requires management to make estimates and assumptions, including estimates of fair value, probable losses and expenses, that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. Certain prior period amounts have been conformed to the current period’s presentation. Unless otherwise noted, the information in Notes 1 through 13 refer only to our continuing operations and do not include discussion of balances or activity of WarnerMedia, Vrio, Xandr and Playdemic Ltd., which were part of discontinued operations.
New Accounting Pronouncement, Policy [Policy Text Block]	Supplier Finance Obligations As of January 1, 2023, we adopted, with retrospective application, the Financial Accounting Standards Board’s (FASB) Accounting Standards Update (ASU) No. 2022-04, “Liabilities – Supplier Finance Programs (Subtopic 405-50): Disclosure of Supplier Finance Program Obligations” (ASU 2022-04), which establishes interim and annual reporting disclosure requirements about a company’s supplier finance programs for its purchase of goods and services. Interim and annual requirements include disclosure of outstanding amounts under the obligations as of the end of the reporting period, and annual requirements include a rollforward of those obligations for the annual reporting period, as well as a description of payment and other key terms of the programs. The annual rollforward requirement becomes effective for annual periods beginning after December 15, 2023, with prospective application. The standard allows early adoption of this requirement. In the year of adoption, the disclosure of payment and other key terms under the programs and outstanding balances under the obligations also applies to interim reporting dates.

Preparation Of Interim Financial Statements (Policies)

3 Months Ended

Mar. 31, 2023

Principles of Consolidation [Policy Text Block]

All significant intercompany transactions are eliminated in the consolidation process. Investments in subsidiaries and partnerships which we do not control but have significant influence are accounted for under the equity method. Earnings from certain investments accounted for using the equity method are included in our results on a one quarter lag. We also record our proportionate share of our equity method investees’ other comprehensive income (OCI) items, including translation adjustments.

Basis of Accounting [Policy Text Block]

The preparation of financial statements in conformity with U.S. generally accepted accounting principles (GAAP) requires management to make estimates and assumptions, including estimates of fair value, probable losses and expenses, that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates. Certain prior period amounts have been conformed to the current period’s presentation. Unless otherwise noted, the information in Notes 1 through 13 refer only to our continuing operations and do not include discussion of balances or activity of WarnerMedia, Vrio, Xandr and Playdemic Ltd., which were part of discontinued operations.

New Accounting Pronouncement, Policy [Policy Text Block]

Supplier Finance Obligations As of January 1, 2023, we adopted, with retrospective application, the Financial Accounting Standards Board’s (FASB) Accounting Standards Update (ASU) No. 2022-04, “Liabilities – Supplier Finance Programs (Subtopic 405-50): Disclosure of Supplier Finance Program Obligations” (ASU 2022-04), which establishes interim and annual reporting disclosure requirements about a company’s supplier finance programs for its purchase of goods and services. Interim and annual requirements include disclosure of outstanding amounts under the obligations as of the end of the reporting period, and annual requirements include a rollforward of those obligations for the annual reporting period, as well as a description of payment and other key terms of the programs. The annual rollforward requirement becomes effective for annual periods beginning after December 15, 2023, with prospective application. The standard allows early adoption of this requirement. In the year of adoption, the disclosure of payment and other key terms under the programs and outstanding balances under the obligations also applies to interim reporting dates.