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Income taxes (Components of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Deferred income tax assets: |  |
NOL and credit carryforwards | $ 1,344 | $ 1,065
Accrued expenses | 584 | 600
Capitalized research and development expenses | 515 | 0
Deferred Tax Assets, Equity Method Investments | 270 | 0
Expenses capitalized for tax | 211 | 244
Deferred tax asset, earnings of foreign subsidiaries | 192 | 0
Stock-based compensation | 104 | 96
Other | 317 | 326
Total deferred income tax assets | 3,537 | 2,331
Valuation allowance | (718) | (663)
Net deferred income tax assets | 2,819 | 1,668
Deferred income tax liabilities: |  |
Acquired intangible assets | (1,238) | (824)
Debt | (272) | (275)
Fixed assets | (112) | (129)
Other | (254) | (221)
Total deferred income tax liabilities | (1,876) | (1,449)
Total deferred income taxes, net | $ 943 | $ 219

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