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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Deferred tax assets    
Net operating loss carryforwards $ 4,319 $ 6,164
Research and development credits 1,539 1,275
Stock-based compensation 71 66
Accruals and reserves 730 440
Accrued legal 221 120
Deferred Tax Asset, Fixed Assets and Intangible Assets 3,500 4,135
Lease liability 391 436
Interest limitation carryforwards 760 876
Capitalized research expenses 1,317 771
Other 381 211
Total deferred tax assets 13,229 14,494
Less: Valuation allowance (6,267) (13,945)
Total deferred tax assets, net of valuation allowance 6,962 549
Deferred tax liabilities    
Investments 515 114
ROU assets 270 301
Other 14 18
Total deferred tax liabilities 799 433
Net deferred tax assets (liabilities) $ 6,163 $ 116