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Business Combination (Additional Information) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 19, 2024
Apr. 28, 2023
Jan. 31, 2022
Sep. 26, 2025
Sep. 27, 2024
Sep. 29, 2023
Business Combination [Line Items]            
Goodwill       $ 529,900 $ 533,208 $ 408,409
Total purchase consideration       $ 1,362 487,877 $ (25,703)
Weighted-average useful life       14 years    
Payments to acquire intangible assets       $ 5,600    
MPEG LA, L.L.C.            
Business Combination [Line Items]            
Percentage acquired   100.00%        
Non-controlling interest in Via LA   $ 24,815        
Cash held in escrow   3,600        
Goodwill   40,579   (20,300)    
Amounts payable to patent administrative program partners   (179,616)   (20,300)    
Acquisition related costs       3,800    
Intangible assets   $ 86,000        
Weighted-average useful life   12 years        
GE Licensing            
Business Combination [Line Items]            
Percentage acquired 100.00%          
Non-controlling interest in Via LA $ 9,921          
Goodwill 75,387          
Acquisition related costs       6,400    
Intangible assets $ 274,197          
Weighted-average useful life 11 years          
Assets acquired $ 18,200       24,500  
Contingent liabilities 14,199          
Payments to acquire intangible assets         274,200  
GE Licensing | Disposal Group, Held-for-Sale, Not Discontinued Operations            
Business Combination [Line Items]            
Assets acquired $ 6,300          
GE Licensing | Total Dolby Laboratories,Inc.[Member]            
Business Combination [Line Items]            
Purchase of non-controlling interest in business combinations         5,300  
GE Licensing | Controlling Interest [Member]            
Business Combination [Line Items]            
Purchase of non-controlling interest in business combinations         4,600  
GE Licensing | General and Administrative Expense [Member]            
Business Combination [Line Items]            
Acquisition related costs       4,300    
GE Licensing | Selling and Marketing Expense [Member]            
Business Combination [Line Items]            
Acquisition related costs       $ 2,100    
THEO Technologies            
Business Combination [Line Items]            
Goodwill     $ 39,900      
Total purchase consideration     $ 58,700      
Payments to acquire intangible assets         $ 24,600  
THEO Technologies | Minimum [Member]            
Business Combination [Line Items]            
Weighted-average useful life     3 years      
THEO Technologies | Maximum [Member]            
Business Combination [Line Items]            
Weighted-average useful life     13 years