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AVAILABLE-FOR-SALE DEBT SECURITIES AND EQUITY SECURITIES - Summary of Available-for-Sale Debt Securities at Estimated Fair Value (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Available-for-Sale Debt Securities
Amortized Cost	$ 2,536	$ 2,501
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(23)	(4)
Estimated Fair Value	2,514	2,497
U.S. treasury securities
Available-for-Sale Debt Securities
Amortized Cost	481	408
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(5)	(1)
Estimated Fair Value	476	407
U.S. government agencies securities
Available-for-Sale Debt Securities
Amortized Cost	5	4
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	5	4
Non-U.S. government securities
Available-for-Sale Debt Securities
Amortized Cost	30	50
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	30	50
Certificates of deposit
Available-for-Sale Debt Securities
Amortized Cost	153	249
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	153	249
Corporate debt securities
Available-for-Sale Debt Securities
Amortized Cost	1,457	1,365
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(15)	(2)
Estimated Fair Value	1,442	1,363
Residential mortgage and asset-backed securities
Available-for-Sale Debt Securities
Amortized Cost	410	425
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(3)	(1)
Estimated Fair Value	$ 407	$ 424

X

- Definition

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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-Name Accounting Standards Codification
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Amortized cost excluding accrued interest, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 45
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-URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454

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Amount excluding accrued interest, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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