SUPPLEMENTAL BALANCE SHEET AND CASH FLOW INFORMATION - Stock Repurchases (Details) $ in Millions	1 Months Ended		6 Months Ended
	Mar. 31, 2020 USD ($) item	Nov. 30, 2018 USD ($) item	Aug. 02, 2020 USD ($) shares	Aug. 04, 2019 USD ($) shares	Jan. 31, 2020 USD ($)
Common Stock
Share repurchases
Number of Shares | shares			96,846	2,066,108
Cost of Shares			$ 3	$ 83
Share Repurchase Program of March 2020
Share repurchases
Authorized share repurchase amount	$ 500
Share Repurchase Program of March 2020 | Common Stock
Share repurchases
Number of share repurchase programs | item	2
Authorized share repurchase amount	$ 500
Share Repurchase Program of November 2018 Plan | Common Stock
Share repurchases
Number of share repurchase programs | item		2
Authorized share repurchase amount		$ 500			$ 500
Share Repurchase Program of August 2017 Plan | Common Stock
Share repurchases
Number of Shares | shares				1,911,964
Cost of Shares				$ 76
Share Repurchase Program of April 2014 Plan | Common Stock
Share repurchases
Number of Shares | shares			96,846	154,144
Cost of Shares			$ 3	$ 7