CONSOLIDATED STATEMENT OF CASH FLOWS (UNAUDITED) (Parenthetical) $ in Millions	6 Months Ended
Jun. 30, 2022 USD ($)
Certificates of deposit \| Revision of Prior Period, Reclassification, Adjustment One
Proceeds from maturities of investments	$ 16,100
Other noncash income (expense)	16,100
Certificates of deposit \| Revision of Prior Period, Reclassification, Adjustment Two
Purchases of investments	(41)
Other noncash income (expense)	$ 41

Amount of cash inflow from maturity, prepayment and call of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481830/320-10-45-11

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 11
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-11

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 230
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 12
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-12

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration