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Income Taxes - Significant Components of Deferred Tax Assets and Tax Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Deferred tax assets:        
Net operating loss carryforwards $ 1,156 $ 424    
Stock-based compensation 129 131    
Capitalized licenses, research and development and start-up costs 1,693 1,794    
Tax credit carryforwards 308 251    
Operating lease liabilities 134 138    
Other comprehensive income 3 4    
Inventory reserve and capitalization 152 205    
Wholesaler chargebacks, discounts and fees 26 43    
Returns and other fees 116 86    
Outside basis difference 84 125    
Other 213 160    
Total deferred tax assets 4,014 3,361    
Less: valuation allowance (3,738) (3,084) $ (2,224) $ (155)
Net deferred tax assets 276 277    
Deferred tax liabilities:        
Right-of-use assets, operating (135) (139)    
Property, plant and equipment (58) (55)    
Other (23) (16)    
Total deferred tax liabilities (216) (210)    
Net deferred tax assets $ 60 $ 67