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Reinsurance (Tables)
 12 Months Ended
Dec. 31, 2018
Reinsurance Disclosures [Abstract]  
Summary of retention limits by period of policy issuance
The following table summarizes those retention limits by period of policy issuance.
Period
 
Retention limits
April 2015 through current
 
Single life: $2 million per life
Joint life: no longer offered
April 2011 through March 2015
 
Single life: $5 million per life, $3 million age 70 and over, and $10 million for contracts that meet specific criteria
Joint life: $8 million per life, and $10 million for contracts that meet specific criteria
July 2007 through March 2011
 
$5 million per life, $3 million age 70 and over, and $10 million for contracts that meet specific criteria
September 1998 through June 2007
 
$2 million per life, in 2006 the limit was increased to $5 million for instances when specific criteria were met
August 1998 and prior
 
Up to $1 million per life
Effects of reinsurance on premiums and contract charges
The effects of reinsurance on premiums and contract charges for the years ended December 31 are as follows: 
($ in millions)
2018
 
2017
 
2016
Direct
$
743

 
$
734

 
$
715

Assumed
 
 
 
 
 
Affiliate
241

 
227

 
138

Non-affiliate
741

 
772

 
803

Ceded
 
 
 
 
 
Affiliate
(51
)
 
(52
)
 
(53
)
Non-affiliate
(275
)
 
(288
)
 
(294
)
Premiums and contract charges, net of reinsurance
$
1,399

 
$
1,393

 
$
1,309
Effects of reinsurance on contract benefits
The effects of reinsurance on contract benefits for the years ended December 31 are as follows:
($ in millions)
2018
 
2017
 
2016
Direct
$
1,062

 
$
1,003

 
$
999

Assumed
 
 
 
 
 
Affiliate
149

 
130

 
90

Non-affiliate
484

 
505

 
522

Ceded
 
 
 
 
 
Affiliate
(35
)
 
(33
)
 
(36
)
Non-affiliate
(214
)
 
(175
)
 
(188
)
Contract benefits, net of reinsurance
$
1,446

 
$
1,430

 
$
1,387
Effects of reinsurance on interest credited to contractholder funds
The effects of reinsurance on interest credited to contractholder funds for the years ended December 31 are as follows:
($ in millions)
2018
 
2017
 
2016
Direct
$
533

 
$
546

 
$
598

Assumed
 
 
 
 
 
Affiliate
8

 
8

 
9

Non-affiliate
104

 
131

 
116

Ceded
 
 
 
 
 
Affiliate
(20
)
 
(21
)
 
(21
)
Non-affiliate
(24
)
 
(25
)
 
(25
)
Interest credited to contractholder funds, net of reinsurance
$
601

 
$
639

 
$
677
Summary of reinsurance recoverables on paid and unpaid benefits
Reinsurance recoverables on paid and unpaid benefits as of December 31 are summarized in the following table.
($ in millions)
2018
 
2017
Annuities
$
1,369

 
$
1,357

Life insurance
1,183

 
1,243

Other
53

 
80

Total
$
2,605

 
$
2,680