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AVAILABLE-FOR-SALE DEBT SECURITIES AND EQUITY SECURITIES - Summary of the Balance Sheet Classification of Available-for-Sale Debt Securities (Details) - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Available-for-Sale Debt Securities    
Total $ 2,514 $ 2,497
Cash and cash equivalents    
Available-for-Sale Debt Securities    
Total 57 6
Short-term marketable debt securities    
Available-for-Sale Debt Securities    
Total 1,029 1,182
Long-term marketable debt securities    
Available-for-Sale Debt Securities    
Total $ 1,427 $ 1,309