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Derivative Instruments and Hedging Activities - Hedged Items in Fair Value Hedging Relationship (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Hedged Items In Fair Value Hedging Relationship [Line Items] |  |
Total Assets | $ 15 | $ (16)
Discontinued Hedging Relationships, Assets | 3,500 | 3,400
Designated hedged items | 2,200 | 2,100
Investment securities available for sale |  |
Hedged Items In Fair Value Hedging Relationship [Line Items] |  |
Carrying Amount Assets | 8,793 | 8,312
Total Assets | 42 | (38)
Discontinued Hedging Relationships, Assets | 60 | 78
Interest-bearing deposits |  |
Hedged Items In Fair Value Hedging Relationship [Line Items] |  |
Carrying Amount Liabilities | (10,317) | (10,331)
Total Liabilities | 85 | 160
Discontinued Hedging Relationships, Liabilities | 0 | 0
Securitized debt obligations |  |
Hedged Items In Fair Value Hedging Relationship [Line Items] |  |
Carrying Amount Liabilities | (8,838) | (11,011)
Total Liabilities | 202 | 276
Discontinued Hedging Relationships, Liabilities | 0 | 0
Senior and subordinated notes |  |
Hedged Items In Fair Value Hedging Relationship [Line Items] |  |
Carrying Amount Liabilities | (29,459) | (30,696)
Total Liabilities | 628 | 1,069
Discontinued Hedging Relationships, Liabilities | $ (194) | $ (225)

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- Definition Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk, remaining after discontinued hedge. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 181 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480401/815-10-55-181 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4EE -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4EE + Details
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