Risk and Uncertainties (Details) $ in Millions	Sep. 30, 2020 USD ($)
Risks and Uncertainties [Abstract]
Percentage of employees working remotely (percent)	25.00%
Excess capital	$ 67
Capital available for bank contributions	$ 10

Amount of total risk-based capital exceeding minimum required for capital adequacy as defined by regulatory framework.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826

Name:	us-gaap_ExcessCapital
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant