CAPITALIZATION - Repurchases of Common Stock Narrative (Details) - USD ($) shares in Millions		3 Months Ended	6 Months Ended
	Feb. 24, 2020	Jul. 31, 2020	Jul. 31, 2020	Aug. 02, 2019	Jul. 15, 2020	May 29, 2019
Class of Stock [Line Items]
Stock repurchases, remaining authorized amount		$ 1,700,000,000	$ 1,700,000,000
Aggregate purchase price		0	240,000,000	$ 2,000,000
Class C
Class of Stock [Line Items]
Stock repurchases, authorized amount	$ 1,000,000,000.0
Stock repurchase program, term	24 months
Stock repurchases, remaining authorized amount		$ 760,000,000	$ 760,000,000
Shares repurchased (in shares)			6.0
Aggregate purchase price			$ 240,000,000
Class A
Class of Stock [Line Items]
Stock repurchases, authorized amount					$ 1,000,000,000.0
Shares repurchased (in shares)			2.5	5.7
Aggregate purchase price			$ 311,000,000	$ 1,000,000,000.0
Shares withheld for tax withholding obligation			$ 275,000,000	348,000,000
Class A | Accumulated Deficit
Class of Stock [Line Items]
Aggregate purchase price				$ 100,000,000
Class A | January 2017 and August 2017 Authorizations
Class of Stock [Line Items]
Stock repurchases, authorized amount						$ 1,500,000,000