FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS (Fair Value Measurements) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012
Marketable Securities [Line Items]
Cash Equivalents, Fair Value	$ 3,201	$ 1,288
Marketable securities, Fair value	4,566	4,592
Marketable securities, Fair value	4,686	4,696	4,574	4,201	4,420	5,125	5,968	6,307
Accrued expenses	2,152	2,573
Other liabilities	625	475
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at January 1, Asset	536	566
Additions from new collaboration	(26)	(48)
Unrealized gains	40	(49)
Sales	(24)	(25)
Fair value at December 31, Asset	511	536
Certificates of Deposit [Member]
Marketable Securities [Line Items]
Marketable securities, Fair value	122	34
Corporate Debt Securities [Member]
Marketable Securities [Line Items]
Marketable securities, Fair value	4,432	4,377
U.S. Treasury Bills [Member]
Marketable Securities [Line Items]
Marketable securities, Fair value		150
Equity Funds [Member]
Marketable Securities [Line Items]
Marketable securities, Fair value	74	57
Fixed Income Funds [Member]
Marketable Securities [Line Items]
Marketable securities, Fair value	46	47
Auction Rate Securities [Member]
Marketable Securities [Line Items]
Marketable securities, Fair value	12
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Unrealized gains	1
Auction Rate Securities And Floating Rate Securities [Member]
Marketable Securities [Line Items]
Marketable securities, Fair value		31
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at January 1, Asset	31	110
Unrealized gains		2
Sales	(20)	(81)
Fair value at December 31, Asset	12	31
Interest Rate Swap [Member]
Marketable Securities [Line Items]
Total derivatives at fair value, assets	64	146
Total derivatives at fair value, liabilities	(27)
Foreign Exchange Forward [Member]
Marketable Securities [Line Items]
Total derivatives at fair value, assets	50	59
Total derivatives at fair value, liabilities	(35)	(30)
Written Option Liability [Member]
Marketable Securities [Line Items]
Total derivatives at fair value, liabilities	(162)	(18)
Accrued expenses	18
Other liabilities	144
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at January 1, Liability	(18)
Additions from new collaboration	(144)	(18)
Fair value at December 31, Liability	(162)	(18)
Contingent Consideration Liability [Member]
Marketable Securities [Line Items]
Total derivatives at fair value, liabilities	(8)	(8)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value at December 31, Liability	(8)	(8)
Fair Value Level 1 [Member] | U.S. Treasury Bills [Member]
Marketable Securities [Line Items]
Marketable securities, Fair value		150
Fair Value Level 2 [Member]
Marketable Securities [Line Items]
Cash Equivalents, Fair Value	3,201	1,288
Fair Value Level 2 [Member] | Certificates of Deposit [Member]
Marketable Securities [Line Items]
Marketable securities, Fair value	122	34
Fair Value Level 2 [Member] | Corporate Debt Securities [Member]
Marketable Securities [Line Items]
Marketable securities, Fair value	4,432	4,377
Fair Value Level 2 [Member] | Equity Funds [Member]
Marketable Securities [Line Items]
Marketable securities, Fair value	74	57
Fair Value Level 2 [Member] | Fixed Income Funds [Member]
Marketable Securities [Line Items]
Marketable securities, Fair value	46	47
Fair Value Level 2 [Member] | Interest Rate Swap [Member]
Marketable Securities [Line Items]
Total derivatives at fair value, assets	64	146
Total derivatives at fair value, liabilities	(27)
Fair Value Level 2 [Member] | Foreign Exchange Forward [Member]
Marketable Securities [Line Items]
Total derivatives at fair value, assets	50	59
Total derivatives at fair value, liabilities	(35)	(30)
Fair Value Level 3 [Member] | Auction Rate Securities [Member]
Marketable Securities [Line Items]
Marketable securities, Fair value	12
Fair Value Level 3 [Member] | Auction Rate Securities And Floating Rate Securities [Member]
Marketable Securities [Line Items]
Marketable securities, Fair value		31
Fair Value Level 3 [Member] | Written Option Liability [Member]
Marketable Securities [Line Items]
Total derivatives at fair value, liabilities	(162)	(18)
Fair Value Level 3 [Member] | Contingent Consideration Liability [Member]
Marketable Securities [Line Items]
Total derivatives at fair value, liabilities	$ (8)	$ (8)