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EQUITY AND EARNINGS PER SHARE - Common Stock Issued in Connection with the WarnerMedia Merger (Narrative) (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Apr. 08, 2022 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |  |
Selling, general and administrative |  | $ 9,296 | $ 9,696 | $ 9,678
WarnerMedia |  |  |  |
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |  |
Equity interest issued or issuable (in shares) | 1,732,000,000 |  |  |
Series A Common Stock | WarnerMedia |  |  |  |
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |  |
Equity interest issued or issuable (in shares) | 1,700,000,000 |  |  |
Series A Common Stock | AT&T | WarnerMedia |  |  |  |
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |  |
Entity shares issued per acquiree share | 1 |  |  |
Series B Common Stock | AT&T | WarnerMedia |  |  |  |
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |  |
Entity shares issued per acquiree share | 1 |  |  |
Series C Common Stock | AT&T | WarnerMedia |  |  |  |
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |  |
Entity shares issued per acquiree share | 1 |  |  |
Series A-1 Convertible Preferred Stock | WarnerMedia |  |  |  |
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |  |
Selling, general and administrative | $ 789 |  |  | $ 789
Series A-1 Convertible Preferred Stock | AT&T | WarnerMedia |  |  |  |
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |  |
Entity shares issued per acquiree share | 13.1135 |  |  |
Series C-1 Convertible Preferred Stock | AT&T | WarnerMedia |  |  |  |
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] |  |  |  |
Entity shares issued per acquiree share | 19.3648 |  |  |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482689/260-10-45-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482689/260-10-45-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 60B -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482689/260-10-45-60B + Details
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