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Derivative Instruments and Hedging Activities - Hedged Items in Fair Value Hedging Relationship (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Hedged Items In Fair Value Hedging Relationship [Line Items] |  |
Total Assets | $ 33 | $ (13)
Discontinued Hedging Relationships, Assets | 2,200 | 236
Designated hedged items | 1,500 | 225
Investment securities available for sale |  |
Hedged Items In Fair Value Hedging Relationship [Line Items] |  |
Carrying Amount Assets | 6,108 | 3,983
Total Assets | (8) | (80)
Discontinued Hedging Relationships, Assets | 126 | 200
Interest-bearing deposits |  |
Hedged Items In Fair Value Hedging Relationship [Line Items] |  |
Carrying Amount Liabilities | (17,374) | (17,280)
Total Liabilities | 277 | 500
Discontinued Hedging Relationships, Liabilities | 0 | (1)
Securitized debt obligations |  |
Hedged Items In Fair Value Hedging Relationship [Line Items] |  |
Carrying Amount Liabilities | (13,375) | (11,921)
Total Liabilities | 503 | 748
Discontinued Hedging Relationships, Liabilities | 0 | 0
Senior and subordinated notes |  |
Hedged Items In Fair Value Hedging Relationship [Line Items] |  |
Carrying Amount Liabilities | (30,899) | (24,544)
Total Liabilities | 971 | 1,542
Discontinued Hedging Relationships, Liabilities | $ (372) | $ (527)

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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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