FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Fair Value Measurement) (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($) percentage yr	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) percentage yr	Sep. 30, 2019 USD ($)	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	$ 2,215		$ 2,215			$ 3,814
Equity Securities, FV-NI	3,061		3,061			2,195
Contingent consideration fair value adjustments	(988)	$ 0	(597)	$ 0
Debt Securities, Available-for-sale, Amortized Cost	2,198		2,198			3,807
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	17		17			8
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0		0			(1)
Total securities	5,276		5,276			6,009
Equity Securities without Readily Determinable Fair Value, Amount	735		735			781
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount	46		318
Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Annual Amount	2		203
Equity Securities, FV-NI, Gain (Loss)	170	(235)	577	(81)
Equity Securities, FV-NI, Realized Gain (Loss)	0	0	0	14
Equity Securities, FV-NI, Unrealized Gain (Loss)	170	$ (235)	577	$ (95)
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			0
Derivative asset	0		0			0
Derivative Liability	0		0			0
Contingent consideration fair value	0		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	17,075		17,075			10,448
Derivative asset	74		74			140
Derivative Liability	(120)		(120)			(40)
Contingent consideration fair value	0		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			0
Derivative asset	0		0			0
Derivative Liability	0		0			0
Contingent consideration fair value	73		73		$ 106	106
Contingent consideration fair value adjustments			(35)
Business Combination, Contingent Consideration Arrangements, Change in Amount of Due to Foreign Exchange, Liability			2
Certificates of Deposit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	1,391		1,391			1,227
Debt Securities, Available-for-sale, Amortized Cost	1,391		1,391			1,227
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0		0			0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0		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			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	1,391		1,391			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			0
Commercial Paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	0		0			1,093
Debt Securities, Available-for-sale, Amortized Cost	0		0			1,093
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0		0			0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0		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			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	0		0			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			0
Corporate Debt Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale	824		824			1,494
Debt Securities, Available-for-sale, Amortized Cost	807		807			1,487
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	17		17			8
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0		0			(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			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	824		824			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			0
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	2,927		2,927			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	134		134			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			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	496		496			429
Contingent Value Rights [Member] | Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration fair value	1,697		1,697			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]
Contingent consideration fair value	0		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]
Contingent consideration fair value	$ 0		$ 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	0.80		0.80
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	0.027		0.027
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		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		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		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		0.022
Projected Year of Payments | Maximum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability, Measurement Input [Extensible List] | yr	2,025		2,025
Projected Year of Payments | Minimum [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Business Combination, Contingent Consideration, Liability, Measurement Input [Extensible List] | yr	2,021		2,021