v3.23.3
Non-marketable Equity Securities
9 Months Ended
Sep. 30, 2023
Investments, Debt and Equity Securities [Abstract]  
Non-marketable Equity Securities Non-marketable Equity Securities
Our non-marketable equity securities are investments in privately-held companies without readily determinable fair values. The following table summarizes our non-marketable equity securities that were measured using measurement alternative and equity method (in millions):
September 30, 2023December 31, 2022
Non-marketable equity securities under measurement alternative:
Initial cost$6,389 $6,388 
Cumulative upward adjustments293 293 
Cumulative impairment/downward adjustments(599)(497)
Carrying value6,083 6,184 
Non-marketable equity securities under equity method59 17 
Total$6,142 $6,201