FAIR VALUE MEASUREMENT (Details) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Financial instruments carried at fair value [Line Items]
Total	$ 254	$ 1,201
Options And Forward Contracts Derivative Liabilities [Member]
Financial instruments carried at fair value [Line Items]
Derivatives - Liabilities	15	17
Asset Derivatives [Member]
Financial instruments carried at fair value [Line Items]
Derivatives - Asset	17	10
ContingentConsiderationClassifiedAsAssetsOrLiabilitesFairValueDisclosure	(735)	(828)
Level 1 [Member]
Financial instruments carried at fair value [Line Items]
Total	1,042	1,844
Level 1 [Member] \| Options And Forward Contracts Derivative Liabilities [Member]
Financial instruments carried at fair value [Line Items]
Derivatives - Liabilities	0	0
Level 1 [Member] \| Asset Derivatives [Member]
Financial instruments carried at fair value [Line Items]
Derivatives - Asset	0	0
ContingentConsiderationClassifiedAsAssetsOrLiabilitesFairValueDisclosure	0	0
Level 2 [Member]
Financial instruments carried at fair value [Line Items]
Total	(71)	168
Level 2 [Member] \| Options And Forward Contracts Derivative Liabilities [Member]
Financial instruments carried at fair value [Line Items]
Derivatives - Liabilities	15	17
Level 2 [Member] \| Asset Derivatives [Member]
Financial instruments carried at fair value [Line Items]
Derivatives - Asset	17	10
ContingentConsiderationClassifiedAsAssetsOrLiabilitesFairValueDisclosure	0	0
Level 3 [Member]
Financial instruments carried at fair value [Line Items]
Total	(717)	(811)
Level 3 [Member] \| Options And Forward Contracts Derivative Liabilities [Member]
Financial instruments carried at fair value [Line Items]
Derivatives - Liabilities	0	0
Level 3 [Member] \| Asset Derivatives [Member]
Financial instruments carried at fair value [Line Items]
Derivatives - Asset	0	0
ContingentConsiderationClassifiedAsAssetsOrLiabilitesFairValueDisclosure	(735)	(828)
Money Market Funds [Member]
Financial instruments carried at fair value [Line Items]
Cash And Cash Equivalents Fair Value Disclosure	5	24
Money Market Funds [Member] \| Level 1 [Member]
Financial instruments carried at fair value [Line Items]
Cash And Cash Equivalents Fair Value Disclosure	5	24
Money Market Funds [Member] \| Level 2 [Member]
Financial instruments carried at fair value [Line Items]
Cash And Cash Equivalents Fair Value Disclosure	0	0
Money Market Funds [Member] \| Level 3 [Member]
Financial instruments carried at fair value [Line Items]
Cash And Cash Equivalents Fair Value Disclosure	0	0
Demand Deposits [Member]
Financial instruments carried at fair value [Line Items]
Cash And Cash Equivalents Fair Value Disclosure	958	964
Demand Deposits [Member] \| Level 1 [Member]
Financial instruments carried at fair value [Line Items]
Cash And Cash Equivalents Fair Value Disclosure	958	964
Demand Deposits [Member] \| Level 2 [Member]
Financial instruments carried at fair value [Line Items]
Cash And Cash Equivalents Fair Value Disclosure	0	0
Demand Deposits [Member] \| Level 3 [Member]
Financial instruments carried at fair value [Line Items]
Cash And Cash Equivalents Fair Value Disclosure	0	0
Auction Rate Securities [Member]
Financial instruments carried at fair value [Line Items]
Investment in securities	0
Auction Rate Securities [Member] \| Level 1 [Member]
Financial instruments carried at fair value [Line Items]
Investment in securities	0
Auction Rate Securities [Member] \| Level 2 [Member]
Financial instruments carried at fair value [Line Items]
Investment in securities	0
Auction Rate Securities [Member] \| Level 3 [Member]
Financial instruments carried at fair value [Line Items]
Investment in securities	0
Structured Finance [Member]
Financial instruments carried at fair value [Line Items]
Investment in securities	0	89
Structured Finance [Member] \| Level 1 [Member]
Financial instruments carried at fair value [Line Items]
Investment in securities	0	0
Structured Finance [Member] \| Level 2 [Member]
Financial instruments carried at fair value [Line Items]
Investment in securities	0	89
Structured Finance [Member] \| Level 3 [Member]
Financial instruments carried at fair value [Line Items]
Investment in securities	0	0
Other Debt Obligations [Member]
Financial instruments carried at fair value [Line Items]
Investment in securities	32	31
Other Debt Obligations [Member] \| Level 1 [Member]
Financial instruments carried at fair value [Line Items]
Investment in securities	14	14
Other Debt Obligations [Member] \| Level 2 [Member]
Financial instruments carried at fair value [Line Items]
Investment in securities	0	0
Other Debt Obligations [Member] \| Level 3 [Member]
Financial instruments carried at fair value [Line Items]
Investment in securities	18	17
Interest Rate Swap [Member]
Financial instruments carried at fair value [Line Items]
Derivatives - Asset	25	88
Interest Rate Swap [Member] \| Level 1 [Member]
Financial instruments carried at fair value [Line Items]
Derivatives - Asset	0	0
Interest Rate Swap [Member] \| Level 2 [Member]
Financial instruments carried at fair value [Line Items]
Derivatives - Asset	25	88
Interest Rate Swap [Member] \| Level 3 [Member]
Financial instruments carried at fair value [Line Items]
Derivatives - Asset	0	0
Equity Securities [Member]
Financial instruments carried at fair value [Line Items]
Investment in securities	65	842
Equity Securities [Member] \| Level 1 [Member]
Financial instruments carried at fair value [Line Items]
Investment in securities	65	842
Equity Securities [Member] \| Level 2 [Member]
Financial instruments carried at fair value [Line Items]
Investment in securities	0	0
Equity Securities [Member] \| Level 3 [Member]
Financial instruments carried at fair value [Line Items]
Investment in securities	0	0
Cross Currency Interest Rate Contract [Member]
Financial instruments carried at fair value [Line Items]
Derivatives - Liabilities	98	2
Cross Currency Interest Rate Contract [Member] \| Level 1 [Member]
Financial instruments carried at fair value [Line Items]
Derivatives - Liabilities	0	0
Cross Currency Interest Rate Contract [Member] \| Level 2 [Member]
Financial instruments carried at fair value [Line Items]
Derivatives - Liabilities	98	2
Cross Currency Interest Rate Contract [Member] \| Level 3 [Member]
Financial instruments carried at fair value [Line Items]
Derivatives - Liabilities	$ 0	$ 0

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Fair value portion 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.

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