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Collateral Financing Arrangements Collateral Financing Arrangements (Tables)
 12 Months Ended
Dec. 31, 2017
Secured Debt [Abstract]  
CFA Associated with Closed Block
Information related to the collateral financing arrangement associated with the closed block (see Note 7) was as follows at:
 
 
December 31,
 
 
2017
 
2016
 
 
(In millions)
Surplus notes outstanding (1)
 
$
1,121

 
$
1,274

Receivable from unaffiliated financial institution (1)
 
$
146

 
$
166

Pledged collateral (2)
 
$
97

 
$
160

Assets held in trust (2)
 
$
1,248

 
$
1,211

__________________
(1)
Carrying value.
(2)
Estimated fair value.