XML 24 R20.htm IDEA: XBRL DOCUMENT v3.20.1
Summary of Significant Accounting Policies (Tables)
 3 Months Ended
Mar. 31, 2020
Accounting Policies [Abstract]  
Schedule of marketable securities
The carrying values of investment securities consisted of the following at March 31, 2020 and December 31, 2019 (in millions):
 
March 31, 2020
 
December 31, 2019
Available-for-sale securities
 
 
 
Time deposits
$
115

 
$
325

Commercial paper
40

 
20

Debt securities
8

 
6

Total available-for-sale securities
163

 
351

Held-to-maturity securities
 
 
 
Corporate bonds
21

 
21

Total held-to-maturity securities
21

 
21

Total investment securities
$
184

 
$
372