CASH, CASH EQUIVALENTS, AND INVESTMENTS - Summary of Debt Securities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Cash and Cash Equivalents [Line Items]
Fair Value, Less than 12 Months	$ 497	$ 31
Unrealized Losses, Less than 12 Months	(1)	0
Fair Value, 12 Months or Greater	0	0
Unrealized Losses 12 Months or Greater	0	0
Fair Value, Total	497	31
Unrealized Losses, Total	(1)	0
Money market funds
Cash and Cash Equivalents [Line Items]
Fair Value, Less than 12 Months	259
Unrealized Losses, Less than 12 Months	0
Fair Value, 12 Months or Greater	0
Unrealized Losses 12 Months or Greater	0
Fair Value, Total	259
Unrealized Losses, Total	0
Corporate debt securities
Cash and Cash Equivalents [Line Items]
Fair Value, Less than 12 Months	207	7
Unrealized Losses, Less than 12 Months	(1)	0
Fair Value, 12 Months or Greater	0	0
Unrealized Losses 12 Months or Greater	0	0
Fair Value, Total	207	7
Unrealized Losses, Total	(1)	0
Commercial paper
Cash and Cash Equivalents [Line Items]
Fair Value, Less than 12 Months	15	19
Unrealized Losses, Less than 12 Months	0	0
Fair Value, 12 Months or Greater	0	0
Unrealized Losses 12 Months or Greater	0	0
Fair Value, Total	15	19
Unrealized Losses, Total	0	0
Asset-backed securities
Cash and Cash Equivalents [Line Items]
Fair Value, Less than 12 Months	7	5
Unrealized Losses, Less than 12 Months	0	0
Fair Value, 12 Months or Greater	0	0
Unrealized Losses 12 Months or Greater	0	0
Fair Value, Total	7	5
Unrealized Losses, Total	0	$ 0
Certificates of deposit
Cash and Cash Equivalents [Line Items]
Fair Value, Less than 12 Months	5
Unrealized Losses, Less than 12 Months	0
Fair Value, 12 Months or Greater	0
Unrealized Losses 12 Months or Greater	0
Fair Value, Total	5
Unrealized Losses, Total	0
Sovereign bonds
Cash and Cash Equivalents [Line Items]
Fair Value, Less than 12 Months	4
Unrealized Losses, Less than 12 Months	0
Fair Value, 12 Months or Greater	0
Unrealized Losses 12 Months or Greater	0
Fair Value, Total	4
Unrealized Losses, Total	$ 0