Related Party Transactions - Shared Services Agreement with DriveTime (Details) - DriveTime Automotive Group, Inc. - Related Party - Shared Services Agreement with DriveTime - USD ($) $ in Millions |
1 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Feb. 28, 2021 |
Dec. 31, 2022 |
Dec. 31, 2021 |
Dec. 31, 2020 |
|
| Related Party Transaction [Line Items] | ||||
| Number of allowable days prior to contract termination with written notice | 30 days | |||
| Number of allowable days prior to contract termination with written notice from service provider | 90 days | |||
| Payments to acquire GAP waiver insurance policy (less than) | $ 1 | $ 1 | $ 1 | |