Variable Interest Entities - Private Secured Term Funding (Details) - Private Secured Term Funding - Consolidated VIEs	6 Months Ended
Jun. 30, 2022 USD ($)
Debt Instrument [Line Items]
Debt instrument, principal amount	$ 350,000,000
Payments required in first 3 years	$ 0
Amortization period after first 3 years	1 year

Face (par) amount of debt instrument at time of issuance.

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