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CASH, CASH EQUIVALENTS AND MARKETABLE SECURITIES (Details) - USD ($) $ in Millions | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2016 | Mar. 31, 2015 | Dec. 31, 2015 | Dec. 31, 2014
Cash and Cash Equivalents [Abstract] |  |  |  |
Cash | $ 3 |  | $ 4 |
Money market funds and other securities | 75 |  | 69 |
Cash and cash equivalents | 78 | $ 51 | 73 | $ 107
Available-for-sale Securities, Current [Abstract] |  |  |  |
Marketable securities, Cost Basis | 1,478 |  | 1,260 |
Marketable securities, Unrealized Gains | 10 |  | 1 |
Marketable securities, Unrealized Losses | (2) |  | (6) |
Marketable securities, Fair Value | 1,486 |  | 1,255 |
Cash and marketables securities, Cost Basis | 1,556 |  | 1,333 |
Cash and marketable securities, Unrealized Gains | 10 |  | 1 |
Cash and marketable securities, Unrealized Losses | (2) |  | (6) |
Total cash and marketable securities | 1,564 |  | 1,328 |
Available-for-sale Securities, Activity [Abstract] |  |  |  |
Proceeds from sales and maturities | 140 | 259 |  |
Gross realized gains | 0 | 1 |  |
Gross realized losses | 0 | $ (1) |  |
U.S. government and agency securities [Member] |  |  |  |
Available-for-sale Securities, Current [Abstract] |  |  |  |
Marketable securities, Cost Basis | 410 |  | 254 |
Marketable securities, Unrealized Gains | 2 |  | 0 |
Marketable securities, Unrealized Losses | 0 |  | (1) |
Marketable securities, Fair Value | 412 |  | 253 |
Foreign government bonds [Member] |  |  |  |
Available-for-sale Securities, Current [Abstract] |  |  |  |
Marketable securities, Cost Basis | 28 |  | 31 |
Marketable securities, Unrealized Gains | 0 |  | 0 |
Marketable securities, Unrealized Losses | 0 |  | 0 |
Marketable securities, Fair Value | 28 |  | 31 |
Asset-backed securities [Member] |  |  |  |
Available-for-sale Securities, Current [Abstract] |  |  |  |
Marketable securities, Cost Basis | 154 |  | 130 |
Marketable securities, Unrealized Gains | 1 |  | 0 |
Marketable securities, Unrealized Losses | (1) |  | 0 |
Marketable securities, Fair Value | 154 |  | 130 |
Mortgage-backed securities [Member] |  |  |  |
Available-for-sale Securities, Current [Abstract] |  |  |  |
Marketable securities, Cost Basis | 120 |  | 117 |
Marketable securities, Unrealized Gains | 1 |  | 0 |
Marketable securities, Unrealized Losses | 0 |  | (1) |
Marketable securities, Fair Value | 121 |  | 116 |
Corporate notes and bonds [Member] |  |  |  |
Available-for-sale Securities, Current [Abstract] |  |  |  |
Marketable securities, Cost Basis | 749 |  | 711 |
Marketable securities, Unrealized Gains | 6 |  | 1 |
Marketable securities, Unrealized Losses | (1) |  | (4) |
Marketable securities, Fair Value | 754 |  | 708 |
Municipal securities [Member] |  |  |  |
Available-for-sale Securities, Current [Abstract] |  |  |  |
Marketable securities, Cost Basis | 17 |  | 17 |
Marketable securities, Unrealized Gains | 0 |  | 0 |
Marketable securities, Unrealized Losses | 0 |  | 0 |
Marketable securities, Fair Value | $ 17 |  | $ 17 |

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- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27161-111563 + Details
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- Definition This item represents the gross profit realized on the sale of debt or equity securities categorized neither as held-to-maturity nor trading securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73527792&loc=d3e27357-111563 + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3044-108585 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash Equivalents -URI http://asc.fasb.org/extlink&oid=6507016 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Cash -URI http://asc.fasb.org/extlink&oid=6506951 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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