SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Oct. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Mar. 28, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash		$ 290	$ 32
Inventory (Note 2)		274	0
Write-down of inventory		95	0	$ 0
Revenues		55	0	0
Shares donated (in shares)	8,000,000
Cash donation	$ 20
Other expenses (Note 2)		663	0	$ 0
Money Market Funds | Fair Value, Inputs, Level 1 | Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Money market funds		$ 13,048	$ 2,782
Cash, Debt Requirements | Subsequent Event
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Restricted cash					$ 250