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

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.

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Amount of debt securities categorized neither as held-to-maturity nor trading.

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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.

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Fair value portion of investments accounted under the cost method.

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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.

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