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Equity Investments
3 Months Ended
Mar. 31, 2022
Investments, Debt and Equity Securities [Abstract]  
Equity Investments Equity Investments
Our equity investments are investments in equity securities of privately-held companies without readily determinable fair values. The following table summarizes our equity investments that were measured using measurement alternative and equity method (in millions):
March 31, 2022December 31, 2021
Equity investments under measurement alternative:
Initial cost$6,480 $6,480 
Cumulative upward adjustments311 311 
Cumulative impairment/downward adjustments(50)(50)
Carrying value6,741 6,741 
Equity investments under equity method34 34 
Total equity investments$6,775 $6,775