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Equity Investments (Tables)
9 Months Ended
Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]  
Equity Securities without Readily Determinable Fair Value
The changes in the carrying value of equity investments for the nine months ended September 30, 2020 are as follows (in millions): 
Balance as of December 31, 2019
$
86

Jio
5,824

Other investments
263

Adjustments
(9
)
Balance as of September 30, 2020
$
6,164