Subsequent Events (Details) - USD ($) shares in Millions	1 Months Ended	3 Months Ended
	Apr. 30, 2022	Mar. 31, 2022	Mar. 31, 2021	May 01, 2022	Aug. 31, 2021
Subsequent Event [Line Items]
Stock repurchase program, authorized amount		$ 1,307,000,000	$ 10,000,000
Stock repurchase program, authorized amount (up to)					$ 5,100,000,000
Subsequent Event
Subsequent Event [Line Items]
Asset-backed securities, at carrying value	$ 660,000,000
Weighted average interest rate	3.96%
Number of shares purchased (in shares)	1.5
Stock repurchase program, authorized amount	$ 393,000,000
Stock repurchase program, authorized amount (up to)				$ 2,000,000,000