Subsequent Events (Details) - USD ($) shares in Millions	1 Months Ended	3 Months Ended	6 Months Ended
	Jul. 31, 2022	Jun. 30, 2022	Jun. 30, 2022	Jun. 30, 2021	May 31, 2022	Apr. 30, 2022
Subsequent Event [Line Items]
Asset-backed securities, at carrying value		$ 800,000,000	$ 800,000,000			$ 660,000,000
Weighted average interest rate					5.10%	3.96%
Stock repurchase program, authorized amount		401,000,000	1,708,000,000	$ 10,000,000
June 2022 Variable Funding Asset Backed Note
Subsequent Event [Line Items]
Asset-backed securities, at carrying value		$ 800,000,000	$ 800,000,000
Subsequent Event
Subsequent Event [Line Items]
Number of shares purchased (in shares)	0.2
Stock repurchase program, authorized amount	$ 28,000,000
Subsequent Event | July 2022 Asset Backed Notes
Subsequent Event [Line Items]
Asset-backed securities, at carrying value	$ 763,000,000
Weighted average interest rate	4.90%
Subsequent Event | June 2022 Variable Funding Asset Backed Note
Subsequent Event [Line Items]
Asset-backed securities, at carrying value	$ 0