SIGNIFICANT ACCOUNTING POLICIES - Adoption of New Accounting Standards (Details) - USD ($) $ in Millions		12 Months Ended
	Jan. 01, 2018	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase to deferred income taxes		$ 1,676	$ 433
Goodwill impairments		2,322	312	$ 1,077
Future minimum lease payments		$ 419
Accounting Standards Update 2016-16
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase to deferred income taxes			$ 1,209
Salix Reporting Unit and Ortho Dermatologics Reporting Unit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Goodwill impairments	$ 2,213