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Interest and Other Expense (Income), Net
 9 Months Ended
Sep. 30, 2019
Other Income and Expenses [Abstract]  
Interest and Other Expense (Income), Net
Interest and Other Expense (Income), Net

Interest and other expense (income), net is comprised of the following (amounts in millions):

 
 
For the Three Months Ended September 30,
 
For the Nine Months Ended September 30,
 
 
2019
 
2018
 
2019
 
2018
Interest income
 
$
(20
)
 
$
(17
)
 
$
(61
)
 
$
(50
)
Interest expense from debt and amortization of debt discount and deferred financing costs
 
23

 
33

 
68

 
118

Unrealized gain on equity investment
 
—

 
—

 
(38
)
 
—

Other expense (income), net
 
(5
)
 
(3
)
 
(2
)
 
(1
)
Interest and other expense (income), net
 
$
(2
)
 
$
13

 
$
(33
)
 
$
67