XML 74 R15.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
CASH AND CASH EQUIVALENTS
12 Months Ended
Dec. 31, 2019
Cash and cash equivalents [abstract]  
CASH AND CASH EQUIVALENTS
CASH AND CASH EQUIVALENTS
US$ MILLIONS
 
2019
 
2018
Cash
 
$
467

 
$
294

Cash equivalents(1)
 
232

 
150

Restricted cash(2)
 
128

 
96

Total cash and cash equivalents
 
$
827

 
$
540

 
(1)
Short-term, highly liquid investments that are readily convertible to known amounts of cash and which are subject to an insignificant risk of changes in value.
(2)
Restricted cash primarily relates to our partnership’s financing arrangements, including debt service accounts.