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 https://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 https://asc.fasb.org/extlink&oid=126954810&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 https://asc.fasb.org/extlink&oid=126954810&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 ($)		3 Months Ended
	Oct. 15, 2022	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Schedule of Available-for-sale Securities [Line Items]
Proceeds from sale of debt securities available-for-sale		$ 0	$ 0
Gross unrealized losses		1,544,631,000		$ 1,759,691,000
US Treasury Securities
Schedule of Available-for-sale Securities [Line Items]
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
Gross unrealized losses	$ 873,000,000.0	$ 390,917,000		$ 498,278,000