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BUSINESS SEGMENT INFORMATION
 6 Months Ended
Jun. 30, 2016
Segment Reporting [Abstract]  
BUSINESS SEGMENT INFORMATION
BUSINESS SEGMENT INFORMATION

The Company consists of two reportable insurance business segments: Aflac Japan and Aflac U.S., both of which sell supplemental health and life insurance. Operating business segments that are not individually reportable and business activities, including reinsurance retrocession activities, not included in Aflac Japan or Aflac U.S. are included in the "Other business segments" category.

We do not allocate corporate overhead expenses to business segments. Consistent with U.S. GAAP accounting guidance for segment reporting, we evaluate and manage our business segments using a financial performance measure called pretax operating earnings. Our definition of operating earnings includes interest cash flows associated with notes payable and excludes the following items from net earnings on an after-tax basis: realized investment gains/losses (securities transactions, impairments, and the impact of derivative and hedging activities), nonrecurring items and other non-operating income (loss). We then exclude income taxes related to operations to arrive at pretax operating earnings. Information regarding operations by segment follows:

  
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
(In millions)
2016
 
2015
 
2016
 
2015
 
Revenues:
 
 
 
 
 
 
 
 
Aflac Japan:
 
 
 
 
 
 
 
 
   Net earned premiums
$
3,402

 
$
2,978

 
$
6,581

 
$
6,056

 
   Net investment income
642

 
605

 
1,264

 
1,218

 
   Other income
11

 
7

 
19

 
15

 
               Total Aflac Japan
4,055

 
3,590

 
7,864

 
7,289

 
Aflac U.S.:
 
 
 
 
 
 
 
 
   Net earned premiums
1,362

 
1,331

 
2,729

 
2,670

 
   Net investment income
176

 
168

 
350

 
334

 
   Other income
0

 
2

 
3

 
5

 
               Total Aflac U.S.
1,538

 
1,501

 
3,082

 
3,009

 
Other business segments
68

 
65

 
136

 
91

 
               Total business segment revenues
5,661

 
5,156

 
11,082

 
10,389

 
Realized investment gains (losses) (1)
(208
)
 
104

 
(157
)
 
100

 
Corporate
69

 
71

 
136

 
169

 
Intercompany eliminations
(48
)
 
(50
)
 
(93
)
 
(133
)
 
Other non-operating income (loss)
(37
)
 
6

 
(80
)
 
(12
)
 
           Total revenues
$
5,437

 
$
5,287

 
$
10,888

 
$
10,513

 
(1) Excluding a gain of $21 and $23 for the three-month periods and $43 and $40 for the six-month periods ended June 30, 2016, and 2015, respectively, related to the interest rate component of the change in fair value of foreign currency swaps on notes payable which is classified as an operating gain when analyzing segment operations
  
Three Months Ended
June 30,
 
Six Months Ended
June 30,
 
(In millions)
2016
 
2015
 
2016
 
2015
 
Pretax earnings:
 
 
 
 
 
 
 
 
Aflac Japan
$
839

 
$
757

 
$
1,677

 
$
1,576

 
Aflac U.S.
291

 
293

 
623

 
578

 
Other business segments
5

 
3

 
8

 
4

 
    Total business segment pretax operating earnings
1,135

 
1,053

 
2,308

 
2,158

 
Interest expense, noninsurance operations
(30
)
 
(38
)
 
(59
)
 
(87
)
 
Corporate and eliminations
(26
)
 
(20
)
 
(61
)
 
(41
)
 
    Pretax operating earnings
1,079

 
995

 
2,188

 
2,030

 
Realized investment gains (losses) (1)
(208
)
 
104

 
(157
)
 
100

 
Other non-operating income (loss)
(37
)
 
(225
)
 
(80
)
 
(243
)
 
    Total earnings before income taxes
$
834

 
$
874

 
$
1,951

 
$
1,887

 
Income taxes applicable to pretax operating earnings
$
372

 
$
344

 
$
755

 
$
701

 
Effect of foreign currency translation on operating earnings
36

 
(59
)
 
49

 
(117
)
 

(1) Excluding a gain of $21 and $23 for the three-month periods and $43 and $40 for the six-month periods ended June 30, 2016, and 2015, respectively, related to the interest rate component of the change in fair value of foreign currency swaps on notes payable which is classified as an operating gain when analyzing segment operations

Assets were as follows:
(In millions)
June 30,
2016
 
December 31,
2015
Assets:
 
 
 
 
 
 
 
Aflac Japan
 
$
120,571

 
 
 
$
97,646

 
Aflac U.S.
 
19,712

 
 
 
18,537

 
Other business segments
 
248

 
 
 
188

 
    Total business segment assets
 
140,531

 
 
 
116,371

 
Corporate
 
28,189

 
 
 
23,375

 
Intercompany eliminations
 
(27,433
)
 
 
 
(21,490
)
 
    Total assets
 
$
141,287

 
 
 
$
118,256

 
Prior-year amounts have been adjusted for the adoption of accounting guidance on January 1, 2016 related to debt issuance costs.