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Earnings per Share (Tables) | 6 Months Ended
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Mar. 31, 2025
Earnings Per Share [Abstract] |
Schedule of Earnings Per Share | The following table sets forth the calculation of basic and diluted net income per common share under the two-class method for the three and six months ended March 31, 2025 and 2024 (in millions, except share amounts, which are reflected in thousands, and per share data):
| Three Months Ended March 31, |  |
| 2025 |  | 2024 |  |  |  |
| Class A |  | Class B |  | Class A |  | Class B |  |  |  |  |  |  |  |
Basic and Diluted EPS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Numerator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to Warner Music Group Corp. | $ | 10 |  |  | $ | 26 |  |  | $ | 27 |  |  | $ | 69 |  |  |  |  |  |  |  |  |
Less: Net income attributable to participating securities (a) | — |  |  | — |  |  | (1) |  |  | — |  |  |  |  |  |  |  |  |
Net income attributable to common stockholders | $ | 10 |  |  | $ | 26 |  |  | $ | 26 |  |  | $ | 69 |  |  |  |  |  |  |  |  |
Denominator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares outstanding | 144,938 |  |  | 375,380 |  |  | 141,044 |  |  | 376,800 |  |  |  |  |  |  |  |  |
Basic and Diluted EPS | $ | 0.07 |  |  | $ | 0.07 |  |  | $ | 0.18 |  |  | $ | 0.18 |  |  |  |  |  |  |  |  |
| Six Months Ended March 31, |  |  |  |  |  |  |  |
| 2025 |  | 2024 |  |  |  |  |  |  |  |
| Class A |  | Class B |  | Class A |  | Class B |  |  |  |  |  |  |  |
Basic and Diluted EPS: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Numerator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income attributable to Warner Music Group Corp. | $ | 78 |  |  | $ | 194 |  |  | $ | 71 |  |  | $ | 184 |  |  |  |  |  |  |  |  |
Less: Net income attributable to participating securities (a) | (3) |  |  | — |  |  | (3) |  |  | — |  |  |  |  |  |  |  |  |
Net income attributable to common stockholders | $ | 75 |  |  | $ | 194 |  |  | $ | 68 |  |  | $ | 184 |  |  |  |  |  |  |  |  |
Denominator |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted average shares outstanding | 143,995 |  |  | 375,380 |  |  | 140,013 |  |  | 377,145 |  |  |  |  |  |  |  |  |
Basic and Diluted EPS | $ | 0.52 |  |  | $ | 0.52 |  |  | $ | 0.49 |  |  | $ | 0.49 |  |  |  |  |  |  |  |  |
______________________________________ (a)Participating securities include unvested restricted stock units, which include the right to receive non-forfeitable dividend equivalents.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 + Details
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