Consolidated Statement of Cash Flows (Parenthetical) $ in Billions	12 Months Ended
Dec. 31, 2022 USD ($)
Statement of Cash Flows [Abstract]
Transfer from securities available for sale to securities held to maturity	$ 88.6
Transferred securities at fair value from available for sale to held to maturity	82.7
Net unrealized losses, related to securities transferred to held to maturity	$ 5.9

Amount, before tax, of adjustment from accumulated other comprehensive income (loss) for amortization of gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) from transfer to investment in debt security measured at amortized cost (held-to-maturity).

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 35
-Paragraph 10B
-Subparagraph (d)
-URI https://asc.fasb.org/extlink&oid=124260725&loc=SL120268667-111560

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