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Earnings per Share | 12 Months Ended
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Sep. 30, 2025
Earnings Per Share [Abstract] |
Earnings per Share | Earnings per Share The Company utilizes the two-class method to report earnings per share. Basic earnings per share is computed by dividing net income available to each class of stock, less earnings available to participating securities, divided by the weighted average number of outstanding common shares for each class of stock. Diluted earnings per share is computed by dividing net income available to each class of stock, less earnings available to participating securities, divided by the weighted average number of outstanding common shares, plus dilutive potential common shares, which is calculated using the treasury-stock method. Under the treasury-stock method, potential common shares are excluded from the computation of EPS in periods in which they have an anti-dilutive effect. The potentially dilutive common shares did not have a dilutive effect on the Company’s EPS calculation for the fiscal years ended September 30, 2025, September 30, 2024 and September 30, 2023. The Company allocates dividends declared to Class A Common Stock and Class B Common Stock based on timing and amounts actually declared for each class of stock and the undistributed earnings are allocated to Class A Common Stock and Class B Common Stock pro rata on a basic weighted average shares outstanding basis since the two classes of stock participate equally on a per share basis upon liquidation. The following table sets forth the calculation of basic and diluted net income per common share under the two-class method (in millions, except share amounts, which are reflected in thousands, and per share data):
| Fiscal Year Ended September 30,
| 2025 |  | 2024 |  | 2023
| Class A |  | Class B |  | Class A |  | Class B |  | Class A |  | Class B
Basic and Diluted EPS: |  |  |  |  |  |  |  |  |  |  |
Numerator |  |  |  |  |  |  |  |  |  |  |
Net income attributable to Warner Music Group Corp. | $ | 105 |  |  | $ | 260 |  |  | $ | 122 |  |  | $ | 313 |  |  | $ | 119 |  |  | $ | 311 |
Less: Net income attributable to participating securities (a) | (4) |  |  | — |  |  | (6) |  |  | — |  |  | (6) |  |  | — |
Net income attributable to common stockholders | $ | 101 |  |  | $ | 260 |  |  | $ | 116 |  |  | $ | 313 |  |  | $ | 113 |  |  | $ | 311 |
Denominator |  |  |  |  |  |  |  |  |  |  |
Weighted average shares outstanding | 145,128 |  |  | 375,380 |  |  | 140,882 |  |  | 376,641 |  |  | 138,070 |  |  | 377,650 |
Basic and Diluted EPS (b) | $ | 0.69 |  |  | $ | 0.69 |  |  | $ | 0.83 |  |  | $ | 0.83 |  |  | $ | 0.82 |  |  | $ | 0.82 |
______________________________________ (a)Participating securities include unvested restricted stock units, which include the right to receive non-forfeitable dividend equivalents. Participating securities are not contractually obligated to share in losses. (b)For the fiscal year ended September 30, 2025, the weighted average shares outstanding for Diluted EPS includes the dilutive effect of approximately 397 shares. As the resulting Diluted EPS rounds to the same reported amount as Basic EPS, both Basic and Diluted EPS for the fiscal year ended September 30, 2025 are presented as $0.69 per share. There were no dilutive potentially issuable shares in the fiscal years ended September 30, 2024 and September 30, 2023.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/260/tableOfContent Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-2 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482662/260-10-50-3 + Details
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