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Other Assets (Tables)
9 Months Ended
Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Variable Interest Entities
The following table provides information related to this Partnership (in millions):
 
 
September 30, 2018
 
December 31, 2017
Unamortized investment balance classified as other assets
 
$
68

 
$
118

Maximum exposure to loss
 
$
68

 
$
118