BUSINESS ACQUISITIONS (Details) - USD ($)		3 Months Ended
	Jan. 21, 2020	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Cash acquired from acquisition		$ 3,000,000	$ 0
Goodwill		$ 6,694,000,000		$ 6,619,000,000	$ 6,563,000,000
Customer Relationships
Business Acquisition [Line Items]
Intangible assets, useful life		18 years
Blueprint Genetics Oy
Business Acquisition [Line Items]
Cash paid for business acquisitions	$ 108,000,000
Cash acquired from acquisition	3,000,000
Goodwill	77,000,000
Goodwill, expected tax deductible amount	0
Intangible assets	43,000,000
Deferred tax liabilities	11,000,000
Property, plant and equipment and working capital	$ 2,000,000
Blueprint Genetics Oy | Technology
Business Acquisition [Line Items]
Intangible assets, useful life	10 years
Blueprint Genetics Oy | Customer Relationships
Business Acquisition [Line Items]
Intangible assets, useful life	15 years