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Fair Value of Assets and Liabilities - Summary Of Changes In Level 3 Assets And Liabilities Measured At Fair Value (Details) - Level 3 - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021
Net derivative liabilities |  |  |  |
Beginning balance | $ (28) | $ (18) | $ (23) | $ (14)
Total net gains (losses) included in net income | (1) | 0 | (13) | (9)
Purchases |  | 0 | 0 | 0
Sales | 0 | 0 | 0 | 0
Settlements | 9 | 2 | 16 | 7
Repayments | 0 |  | 0 |
Net transfers into (out of) Level 3 | 0 | 0 | 0 | 0
Ending balance | (20) | (16) | (20) | (16)
Net unrealized gains (losses) included in net income | (1) | 0 | (13) | (9)
Interest-only strips |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning balance | 26 | 30 | 38 | 32
Total net gains (losses) included in net income | (2) | 1 | (5) | 5
Purchases |  | 0 | 0 | 0
Sales | (23) | (35) | (61) | (68)
Settlements | 0 | 0 | 0 | 0
Repayments | 0 |  | 0 |
Net transfers into (out of) Level 3 | 22 | 20 | 51 | 47
Ending balance | 23 | 16 | 23 | 16
Net unrealized gains (losses) included in net income | (1) | 0 | (2) | 0
Loans held for sale |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning balance | 34 | 25 | 28 | 12
Total net gains (losses) included in net income | 0 | 0 | 0 | 2
Purchases |  | 3 | 1 | 8
Sales | (14) | (8) | (14) | (18)
Settlements | 0 | 0 | (1) | (2)
Repayments | (1) |  | (1) |
Net transfers into (out of) Level 3 | 1 | 4 | 7 | 22
Ending balance | 20 | 24 | 20 | 24
Net unrealized gains (losses) included in net income | $ 0 | 0 | $ 0 | 2
Loans held for investment |  |  |  |
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |  |  |
Beginning balance |  |  |  | 16
Total net gains (losses) included in net income |  |  |  | 0
Purchases |  |  |  | 0
Sales |  |  |  | 0
Settlements |  |  |  | (2)
Net transfers into (out of) Level 3 |  |  |  | (14)
Ending balance |  | $ 0 |  | 0
Net unrealized gains (losses) included in net income |  |  |  | $ 0

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- Definition Amount of unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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