Fair Value - Schedule of Fair Value Measurements - Reconciliation of Level 3 Assets And Liabilities (Details) - Fair value, measurements, recurring - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Derivative liabilities, net of derivative assets
Liabilities
Fair value at beginning of the period	$ 3	$ 18	$ 8	$ 39
Net realized/unrealized gains
Included in earnings	(5)	(3)	(14)	(6)
Included in OCI	0	0	0	0
Purchases and originations	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	(5)	(5)	(30)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	5	3	14	10
Fair value at ending of the period	3	13	3	13
Net unrealized gains still held at September 30,
Included in earnings	(2)	0	(7)	(3)
Included in OCI	0	0	0	0
Equity securities
Assets
Fair value at beginning of the period	0	1	1	1
Net realized/unrealized gains
Included in earnings	0	0	0	0
Included in OCI	0	0	0	0
Purchases and originations	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	(1)	0
Fair value at ending of the period	0	1	0	1
Net unrealized gains still held at September 30,
Included in earnings	0	0	0	0
Included in OCI	0	0	0	0
Available-for-sale securities
Assets
Fair value at beginning of the period	11	5	9	4
Net realized/unrealized gains
Included in earnings	0	0	0	0
Included in OCI	0	0	0	0
Purchases and originations	27	0	29	1
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	(1)	0	(1)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Fair value at ending of the period	38	4	38	4
Net unrealized gains still held at September 30,
Included in earnings	0	0	0	0
Included in OCI	0	0	0	0
Available-for-sale debt security	27		27
Mortgage loans held-for-sale
Assets
Fair value at beginning of the period	2	0	0	0
Net realized/unrealized gains
Included in earnings	0	0	0	0
Included in OCI	0	0	0	0
Purchases and originations	16	0	18	0
Sales	(11)	0	(11)	0
Issuances	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Fair value at ending of the period	7	0	7	0
Net unrealized gains still held at September 30,
Included in earnings	0	0	0	0
Included in OCI	0	0	0	0
Finance receivables and loans, net | Consumer Loan
Assets
Fair value at beginning of the period	0	0	0	3
Net realized/unrealized gains
Included in earnings	0	0	0	0
Included in OCI	0	0	0	0
Purchases and originations	0	0	0	0
Sales	0	0	0	0
Issuances	0	0	0	0
Settlements	0	0	0	(3)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Fair value at ending of the period	0	0	0	0
Net unrealized gains still held at September 30,
Included in earnings	0	0	0	0
Included in OCI	$ 0	$ 0	$ 0	$ 0