FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Fair Value Measurement) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) percentage	Mar. 31, 2019 USD ($)	Jan. 01, 2020 USD ($)	Dec. 31, 2019 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	$ 3,156			$ 3,814
Equity Securities, FV-NI	1,967			2,195
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	556	$ 0
Debt Securities, Available-for-sale, Amortized Cost	3,147			3,807
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	11			8
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(2)			(1)
Total securities	5,123			6,009
Investments, Fair Value Disclosure	5,123			6,009
Equity Securities without Readily Determinable Fair Value, Amount	754			781
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount	75
Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Annual Amount	188
Equity Securities, FV-NI, Gain (Loss)	(228)	95
Equity Securities, FV-NI, Realized Gain (Loss)	0	14
Equity Securities, FV-NI, Unrealized Gain (Loss)	(228)	$ 81
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0			0
Derivative asset				0
Derivative Liability	0			0
Business Combination, Contingent Consideration, Liability	0			0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	13,528			10,448
Derivative asset	202			140
Derivative Liability	(29)			(40)
Business Combination, Contingent Consideration, Liability	0			0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0			0
Derivative asset				0
Derivative Liability	0			0
Business Combination, Contingent Consideration, Liability	69		$ 106	106
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	(36)
Business Combination, Contingent Consideration Arrangements, Change in Amount of Due to Foreign Exchange, Liability	(1)
Certificates of Deposit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	1,062			1,227
Debt Securities, Available-for-sale, Amortized Cost	1,062			1,227
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0			0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0			0
Certificates of Deposit [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0			0
Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	1,062			1,227
Certificates of Deposit [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0			0
Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	869			1,093
Debt Securities, Available-for-sale, Amortized Cost	869			1,093
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0			0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0			0
Commercial Paper [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0			0
Commercial Paper [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	869			1,093
Commercial Paper [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0			0
Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	1,225			1,494
Debt Securities, Available-for-sale, Amortized Cost	1,216			1,487
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	11			8
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(2)			(1)
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0			0
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	1,225			1,494
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0			0
Marketable debt securities - current [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	2,505			3,047
Marketable debt securities - non-current [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	651			767
Other Assets [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments, Fair Value Disclosure	1,967			2,195
Other Assets [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	1,822			2,020
Other Assets [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	145			175
Other Assets [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Securities, FV-NI	0			0
Portion at Other than Fair Value Measurement [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Method Investments	424			429
Contingent Value Rights [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability	2,862			2,275
Contingent Value Rights [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability	2,862			2,275
Contingent Value Rights [Member] | Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability	0			0
Contingent Value Rights [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability	$ 0			$ 0
Probability of payment [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Measurement Input | percentage	0.8
Probability of payment [Member] | Weighted Average [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Measurement Input | percentage	0.026
Probability of payment [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Measurement Input | percentage	0
Measurement Input, Discount Rate [Member] | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Measurement Input | percentage	0.027
Measurement Input, Discount Rate [Member] | Weighted Average [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Measurement Input | percentage	0.024
Measurement Input, Discount Rate [Member] | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Instrument, Measurement Input | percentage	0.022