Variable Interest Entities, Policy (Details) $ in Millions	Dec. 31, 2021 USD ($)
Variable Interest Entity [Line Items]
Variable funding note maximum principal balance	$ 1,000.0
Term notes payable
Variable Interest Entity [Line Items]
Aggregate principal amount	$ 400.0

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