ALLIANCES (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Alliance Statement [Line Items]
Revenues	$ 6,007	$ 5,691	$ 18,200	$ 16,588
Cost of Goods and Services Sold	1,810	1,648	5,646	4,857
Other Nonoperating Income (Expense)	411	(508)	252	(912)
Receivables	5,510		5,510		$ 5,965
Accounts payable	1,888		1,888		1,892
Collaborative Arrangement [Member]
Alliance Statement [Line Items]
Revenues	2,607	2,214	7,830	6,618
Cost of Goods and Services Sold	1,017	838	3,116	2,528
Selling, General and Administrative Expense - Collaborative Arrangement	(33)	(26)	(93)	(76)
Research and Development Expense - Collaborative Arrangement	11	(2)	32	1,060
Other Nonoperating Income (Expense)	(15)	(14)	(45)	(44)
Receivables	342		342		395
Accounts payable	994		994		904
Deferred income from alliances	452		452		$ 491
Net product sales [Member]
Alliance Statement [Line Items]
Revenues	5,768	5,433	17,512	15,866
Net product sales [Member] | Collaborative Arrangement [Member]
Alliance Statement [Line Items]
Revenues	2,464	2,037	7,412	6,135
Collaborative Arrangement [Member] | Collaborative Arrangement [Member]
Alliance Statement [Line Items]
Revenues	$ 143	$ 177	$ 418	$ 483