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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Deferred tax assets:    
Loss carryforwards $ 462 $ 1,232
Tax credit carryforwards 999 844
Accruals and reserves 122 113
Non-income tax accruals 84 78
Stock-based compensation 70 70
Operating lease liabilities 61 62
Intangible assets 140 158
Capitalized research and development costs 882 671
Other, net 62 55
Gross deferred tax assets 2,882 3,283
Valuation allowance (395) (364)
Total deferred tax assets 2,487 2,919
Deferred tax liabilities:    
Property and equipment basis differences (20) (18)
Operating lease assets (25) (18)
Other, net (7) (2)
Total deferred tax liabilities (52) (38)
Total net deferred tax assets $ 2,435 $ 2,881