BASIS OF PRESENTATION - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings	$ 15,935		$ 15,718
Sales-type lease, net of investment in lease	127
Service contracts, implementation costs	8
Lease Term Originated in 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Sales-type lease, net of investment in lease	21
Lease Term Originated in 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Sales-type lease, net of investment in lease	18
Lease Term Originated in 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Sales-type lease, net of investment in lease	46
Lease Term Originated in 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Sales-type lease, net of investment in lease	36
Lease Term Originated in 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Sales-type lease, net of investment in lease	$ 6
Accounting Standards Update 2016-13
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Retained earnings		$ (4)