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Derivative Instruments and Hedging Activities - Hedged Items in Fair Value Hedging Relationship (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Hedged Items In Fair Value Hedging Relationship [Line Items] |  |
Total Assets | $ 3 | $ 33
Discontinued Hedging Relationships, Assets | 1,800 | 2,200
Designated hedged items | 1,300 | 1,500
Investment securities available for sale |  |
Hedged Items In Fair Value Hedging Relationship [Line Items] |  |
Carrying Amount Assets | 6,058 | 6,108
Total Assets | (51) | (8)
Discontinued Hedging Relationships, Assets | 91 | 126
Interest-bearing deposits |  |
Hedged Items In Fair Value Hedging Relationship [Line Items] |  |
Carrying Amount Liabilities | (14,291) | (17,374)
Total Liabilities | 310 | 277
Discontinued Hedging Relationships, Liabilities | 0 | 0
Securitized debt obligations |  |
Hedged Items In Fair Value Hedging Relationship [Line Items] |  |
Carrying Amount Liabilities | (13,432) | (13,375)
Total Liabilities | 453 | 503
Discontinued Hedging Relationships, Liabilities | 0 | 0
Senior and subordinated notes |  |
Hedged Items In Fair Value Hedging Relationship [Line Items] |  |
Carrying Amount Liabilities | (29,925) | (30,899)
Total Liabilities | 1,355 | 971
Discontinued Hedging Relationships, Liabilities | $ (294) | $ (372)

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