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FAIR VALUE OF FINANCIAL INVESTMENTS AND LIABILITIES - Financial Investments (Details) - USD ($) $ in Millions | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Auction rate securities |  |
Financial Investments |  |
Total recurring investments |  | $ 22
Recurring |  |
Financial Investments |  |
Available-for-sale securities, debt securities | $ 0 |
Total recurring investments | 0 | 22
Non-recurring |  |
Financial Investments |  |
Total | 18 | 48
Non-recurring | Equity method investments |  |
Financial Investments |  |
Equity method investments | 13 | 13
Non-recurring | Private equity funds |  |
Financial Investments |  |
Private equity funds | 5 | 10
Non-recurring | Other investments |  |
Financial Investments |  |
Other investments | $ 0 | $ 3

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- Definition Amount of debt securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=65884222&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26610-111562 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -Subparagraph (b)-(g) -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 + Details
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