SUPPLEMENTAL BALANCE SHEET AND CASH FLOW INFORMATION - Stock Repurchases (Details) - Common Stock $ in Millions	1 Months Ended		3 Months Ended
	Mar. 31, 2020 USD ($) item	Nov. 30, 2018 USD ($) item	May 03, 2020 USD ($) shares	May 05, 2019 USD ($) shares	Jan. 31, 2020 USD ($)	Aug. 31, 2017 USD ($)
Share repurchases
Number of Shares | shares			26,661	271,085
Cost of Shares			$ 1	$ 12
Share Repurchase Program of March 2020
Share repurchases
Number of share repurchase programs | item	2
Authorized share repurchase amount	$ 500
Share Repurchase Program of November 2018 Plan
Share repurchases
Number of share repurchase programs | item		2
Authorized share repurchase amount		$ 500			$ 500	$ 500
Share Repurchase Program of August 2017 Plan
Share repurchases
Number of Shares | shares				170,419
Cost of Shares				$ 7
Share Repurchase Program of April 2014 Plan
Share repurchases
Number of Shares | shares			26,661	100,666
Cost of Shares			$ 1	$ 5