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INVESTMENTS - Other Investments (Details) - USD ($) $ in Millions | Sep. 30, 2017 | Dec. 31, 2016
--- | --- | ---
Investment Holdings [Line Items] |  |  |
Other Investments | [1] | $ 2,358 | $ 1,450
Commercial mortgage loans |  |  |
Investment Holdings [Line Items] |  |  |
Other Investments |  | 1,199 | 855
Middle market loans |  |  |
Investment Holdings [Line Items] |  |  |
Other Investments |  | 798 | 319
Policy loans |  |  |
Investment Holdings [Line Items] |  |  |
Other Investments |  | 207 | 184
Short-term investments |  |  |
Investment Holdings [Line Items] |  |  |
Other Investments |  | 57 | 89
Other investments |  |  |
Investment Holdings [Line Items] |  |  |
Other Investments |  | $ 97 | $ 3
[1] | Includes $1,500 in 2017 and $819 in 2016 of loan receivables and limited partnerships from consolidated variable interest entities

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- Definition Amount of investments classified as other. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(f,g)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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