XML 53 R30.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Summary of Significant Accounting Policies - Additional Information (Detail) (Aflac Japan) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2014 | Mar. 31, 2013 | Dec. 31, 2013
Aflac Japan |  |  |
Significant Accounting Policies [Line Items] |  |  |
Aflac Japan's percentage of the Company's total revenues | 75.00% | 75.00% |
Percentage of the Company Assets | 85.00% |  | 85.00%

X
- Definition Percentage of Company Assets. + References No definition available. + Details
Name: | afl_PercentageOfCompanyAssets
Namespace Prefix: | afl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Percentage of Company Revenue. + References No definition available. + Details
Name: | afl_PercentageOfCompanyRevenue
Namespace Prefix: | afl_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | afl_SignificantAccountingPoliciesLineItems
Namespace Prefix: | afl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration