ACQUISITIONS AND OTHER ARRANGEMENTS - Summary of Fair Value of Assets Acquired and Liabilities Assumed for Saudia Arabia Joint Venture (Details) - USD ($) $ in Millions	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Nov. 30, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Acquisitions And Collaborations [Line Items]
Goodwill	$ 3,030	$ 2,937	$ 2,929	$ 3,002		$ 2,978	$ 2,981	$ 3,103	$ 3,102
Saudi Arabia Joint Venture
Acquisitions And Collaborations [Line Items]
Cash					$ 4
Accounts receivable, net					25
Inventories					8
Property, plant and equipment					12
Goodwill					17
Other intangible assets					40
Other non-current assets					2
Short-term debt					(4)
Accounts payable and other accrued liabilities					(16)
Other non-current liabilities					(8)
Total assets acquired and liabilities assumed					$ 80