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Non-marketable Equity Securities (Tables)
 3 Months Ended
Mar. 31, 2024
Investments, Debt and Equity Securities [Abstract]  
Fair Value Measurements The following table summarizes our non-marketable equity securities that were measured using measurement alternative and equity method (in millions):
March 31, 2024December 31, 2023
Non-marketable equity securities under measurement alternative:
Initial cost$6,390 $6,389 
Cumulative upward adjustments394 293 
Cumulative impairment/downward adjustments(623)(599)
Carrying value6,161 6,083 
Non-marketable equity securities under equity method57 58 
Total$6,218 $6,141