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SCHEDULE V - VALUATION ALLOWANCES AND QUALIFYING ACCOUNTS
 12 Months Ended
Dec. 31, 2017
Valuation and Qualifying Accounts [Abstract]  
SCHEDULE V - VALUATION ALLOWANCES AND QUALIFYING ACCOUNTS
SCHEDULE V - VALUATION ALLOWANCES AND QUALIFYING ACCOUNTS
($ in millions) 
 
 
Additions
 
 
 
 
Description
Balance
as of
beginning
of period
 
Charged
to costs
and
expenses
 
Other
additions
 
Deductions
 
Balance
as of
end of
period
 
 
 
 
 
 
 
 
 
 
Year ended December 31, 2017
 

 
 

 
 

 
 

 
 

 
 
 
 
 
 
 
 
 
 
Allowance for estimated losses on mortgage loans
$
3

 
$
1

 
$
—

 
$
1

 
$
3

 
 
 
 
 
 
 
 
 
 
Year ended December 31, 2016
 

 
 

 
 

 
 

 
 

 
 
 
 
 
 
 
 
 
 
Allowance for estimated losses on mortgage loans
$
3

 
$
—

 
$
—

 
$
—

 
$
3

 
 
 
 
 
 
 
 
 
 
Year ended December 31, 2015
 

 
 

 
 

 
 

 
 

 
 
 
 
 
 
 
 
 
 
Allowance for estimated losses on mortgage loans
$
8

 
$
(4
)
 
$
—

 
$
1

 
$
3