Amount of cash inflow from sale 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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=124260329&loc=d3e26853-111562

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3151-108585

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3179-108585

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

Debt Securities Available for Sale - Debt securities available- for-sale - Additional Information (Details) - USD ($)		9 Months Ended
	Oct. 15, 2022	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Debt Securities, Available-for-sale
Proceeds from sale of debt securities available-for-sale		$ 0	$ 236,000,000
Gross unrealized losses		2,810,210,000		$ 298,348,000
US Treasury Securities
Debt Securities, Available-for-sale
Gross unrealized losses		$ 1,456,502,000		$ 102,059,000
US Treasury Securities \| Subsequent event
Debt Securities, Available-for-sale
Available-for-sale securities transfer to Held-to-maturity	$ 6,500,000,000
Available-for-sale securities transfer to Held-to-Maturity at par value	$ 7,400,000,000