FAIR VALUE OF FINANCIAL INVESTMENTS AND LIABILITIES - Financial Investments (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Financial Investments
Total	$ 48	$ 50
Auction rate securities
Financial Investments
Recurring investments, Available-for-sale securities	22	22
Recurring \| Level 3
Financial Investments
Recurring investments, Available-for-sale securities	22	22
Recurring \| Auction rate securities \| Level 3
Financial Investments
Recurring investments, Available-for-sale securities	22	22
Non-recurring \| Equity method investments
Financial Investments
Equity method investments	13	11
Non-recurring \| Private equity funds
Financial Investments
Private equity funds	10	14
Non-recurring \| Other investments
Financial Investments
Other investments	$ 3	$ 3

Fair value of investments in certain entities that calculate net asset value per share, including, but not limited to, by unit, membership interest, or other ownership interest. Investments include, but are not limited to, investments in certain hedge funds, venture capital funds, private equity funds, real estate partnerships or funds.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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Total of debt securities categorized neither as held-to-maturity nor trading which are intended be sold or mature more than one year from the balance sheet date or operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
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Fair value portion of investments accounted under the cost method.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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Fair value portion of investments accounted under the equity method.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Trading Securities
-URI http://asc.fasb.org/extlink&oid=6526789

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Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-URI http://asc.fasb.org/extlink&oid=6505594

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 03
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