Pending Acquisition - Additional Information (Details) - Flagstar - USD ($) $ in Billions	Apr. 27, 2022	Apr. 26, 2021
Business Acquisition [Line Items]
Percentage of stock transaction value		100.00%
Implied total transaction value		$ 2.6
Subsequent Event
Business Acquisition [Line Items]
Extend merger termination date	Oct. 31, 2022

Percentage of voting equity interests acquired at the acquisition date in the business combination.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

Name:	us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant