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REINSURANCE (Tables)
 12 Months Ended
Dec. 31, 2017
Reinsurance Disclosures [Abstract]  
Effects of Reinsurance
The following table reconciles direct premium income and direct benefits and claims to net amounts after the effect of reinsurance for the years ended December 31.
(In millions)
2017
2016
Direct premium income
 
$
18,875

 
 
$
19,592

 
Ceded to other companies:
 
 
 
 
 
 
    Ceded Aflac Japan closed blocks
 
(515
)
 
 
(560
)
 
    Other
 
(51
)
 
 
(48
)
 
Assumed from other companies:
 
 
 
 
 
 
    Retrocession activities
 
216

 
 
234

 
    Other
 
6

 
 
7

 
Net premium income
 
$
18,531

 
 
$
19,225

 
 
 
 
 
 
 
 
Direct benefits and claims
 
$
12,486

 
 
$
13,240

 
Ceded benefits and change in reserves for future benefits:
 
 
 
 
 
 
    Ceded Aflac Japan closed blocks
 
(473
)
 
 
(509
)
 
    Eliminations
 
51

 
 
58

 
    Other
 
(44
)
 
 
(38
)
 
Assumed from other companies:
 
 
 
 
 
 
    Retrocession activities
 
209

 
 
222

 
    Eliminations
 
(51
)
 
 
(58
)
 
    Other
 
3

 
 
4

 
Benefits and claims, net
 
$
12,181

 
 
$
12,919