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Restructuring and Impairments - Additional Information (Details) - USD ($)
$ in Millions
 3 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Restructuring Cost and Reserve [Line Items]    
Restructuring charges, pretax $ 230  
Restructuring charges $ 150  
Restructuring Charges, Statement of Income or Comprehensive Income [Extensible Enumeration] Restructuring, Settlement and Impairment Provisions  
Non-cash impairments $ 26 $ 0
Cumulative restructuring and impairment charges 205  
Restructuring and impairments 27 $ 0
Operating Segments | Recorded Music    
Restructuring Cost and Reserve [Line Items]    
Cumulative restructuring and impairment charges 195  
Corporate expenses and eliminations    
Restructuring Cost and Reserve [Line Items]    
Cumulative restructuring and impairment charges 10  
Severance And Other Termination Costs    
Restructuring Cost and Reserve [Line Items]    
Restructuring charges, pretax 154  
Restructuring charges 129  
Severance costs 1  
Severance And Other Termination Costs | Operating Segments | Recorded Music    
Restructuring Cost and Reserve [Line Items]    
Severance costs 2  
Severance And Other Termination Costs | Corporate expenses and eliminations    
Restructuring Cost and Reserve [Line Items]    
Severance costs 1  
Other Non-cash Charges    
Restructuring Cost and Reserve [Line Items]    
Restructuring charges 7  
Non-cash Impairment Charges    
Restructuring Cost and Reserve [Line Items]    
Restructuring charges, pretax 76  
Restructuring charges $ 76