v3.26.3
Financial Instruments - Celsius and Other AFS (Detail) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 4 Months Ended 8 Months Ended
Aug. 28, 2025
Sep. 05, 2026
Sep. 06, 2025
Dec. 26, 2026
Sep. 05, 2026
Sep. 06, 2025
Jun. 13, 2026
Dec. 27, 2025
Jun. 14, 2025
Dec. 28, 2024
Celsius & Other AFS                    
Impairment Losses, Investments, Available-for-Sale Securities1         $ 0 $ 0        
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax   $ 557 $ 1,067   557 1,067        
Celsius, AFS debt security [Line Items]                    
Payments to Acquire Debt Securities, Available-for-Sale $ 585                  
Total, AFS debt securities                    
Celsius & Other AFS                    
Debt Securities, Available-for-Sale   1,782 2,344   1,782 2,344        
Other, AFS debt securities                    
Celsius & Other AFS                    
Fair Value, Recurring Basis, Unobservable Input Reconciliation, Asset (Liability), Gain (Loss), OCI   $ 41 6   $ 25 11        
Significant unobservable input used in level 3 fair value measurement - Other AFS, discount rate assumption   8.30%     8.30%     8.30%    
Debt Securities, Available-for-Sale   $ 300 267   $ 300 267 $ 259 $ 275 $ 261 $ 256
Other, AFS debt securities | Subsequent Event                    
Celsius & Other AFS                    
Debt Securities, Available-for-Sale, Realized Gain       $ 50            
Celsius, AFS debt security                    
Celsius & Other AFS                    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Period Increase (Decrease)   $ (14) (6)   $ (42) (20)        
Significant unobservable input used in level 3 fair value measurement - Celsius   8.90%     8.90%     8.50%    
Significant unobservable input used in level 3 fair value measurement - Celsius, probability assumption   80.00%     80.00%     80.00%    
Fair Value, Recurring Basis, Unobservable Input Reconciliation, Asset (Liability), Gain (Loss), OCI   $ 43 535   $ (328) 722        
Debt Securities, Available-for-Sale   1,482 2,077   1,482 2,077 $ 1,453 $ 1,852 $ 958 $ 785
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases   $ 0 $ 590   $ 0 $ 590        
Celsius, AFS debt security [Line Items]                    
Preferred Stock, Convertible, Terms six                  
Preferred Stock, Convertible, Conversion Price $ 51.75                  
Preferred Stock, Dividend Rate, Percentage 5.00%                  
Preferred Stock, Redemption Terms seven