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FINANCING ACTIVITIES - Schedule of Convertible Notes (Details) - Convertible Notes - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Carrying amount of equity component	$ 311	$ 403
Principal amount	2,097	2,300
Unamortized debt discount	(255)	(355)
Net carrying amount	$ 1,842	$ 1,945

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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