INVESTMENTS - Carrying Value of Non-marketable Equity Securities Measured Using the Measurement Alternative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Equity Securities without Readily Determinable Fair Value, Annual Amount [Abstract]
Measurement alternative—carrying value	$ 1,622		$ 1,413
Measurement alternative—impairment losses	0	$ 0
Measurement alternative—downward changes for observable prices	0	0
Measurement alternative—upward changes for observable prices	85	81
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Cumulative Amount [Abstract]
Measurement alternative—impairment losses	80
Measurement alternative—downward changes for observable prices	3
Measurement alternative—upward changes for observable prices	776
Non-marketable equity securities, impairment loss recognized in earnings	$ 0	$ 0