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AVAILABLE-FOR-SALE DEBT SECURITIES AND EQUITY SECURITIES - Summary of Available-for-Sale Debt Securities by Contractual Maturity (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Amortized Cost
Within one year	$ 962
After one year through five years	1,338
After five years through ten years	15
After ten years	9
Amortized Cost	2,324	$ 2,501
Fair Value
Within one year	953
After one year through five years	1,313
After five years through ten years	15
After ten years	8
Estimated Fair Value	$ 2,290	$ 2,497

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