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Income Taxes - Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Operating Loss Carryforwards [Line Items]        
Effective income tax rate reconciliation, percent (2.00%) 1.30% (19.60%)  
Increases to valuation allowance $ 654 $ 860 $ 2,069  
Unrecognized tax benefits 241 $ 240 231 $ 128
More Likely That Not To Realize All Deferred Tax Assets        
Operating Loss Carryforwards [Line Items]        
Increases to valuation allowance     $ 2,100  
Federal        
Operating Loss Carryforwards [Line Items]        
Net operating losses 4,100      
Net operating losses that will carry-forward indefinitely 4,100      
Federal | Research and Development        
Operating Loss Carryforwards [Line Items]        
Tax credit carry-forwards 111      
State        
Operating Loss Carryforwards [Line Items]        
Net operating losses 3,300      
Net operating losses that will carry-forward indefinitely 1,600      
Net operating losses that begin to expire in 2030 1,700      
State | Research and Development        
Operating Loss Carryforwards [Line Items]        
Tax credit carry-forwards 208      
Foreign        
Operating Loss Carryforwards [Line Items]        
Net operating losses 89      
Net operating losses that will carry-forward indefinitely $ 89