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Derivative Instruments (Fair Value Hedge Cumulative) (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
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Derivative Instruments, Gain (Loss) [Line Items] |  |
Hedged Asset, Fair Value Hedge | $ 0 | $ 89
Interest Rate Contract |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Hedged Liability, Fair Value Hedge | (970) | (25)
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) | (43) | (1)
Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) | (23) | 1
Other Contract |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |
Hedged Liability, Fair Value Hedge | (672) | 0
Hedged Liability, Fair Value Hedge, Cumulative Increase (Decrease) | (32) | 0
Hedged Liability, Discontinued Fair Value Hedge, Cumulative Increase (Decrease) | $ (25) | $ 0

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- Definition Amount of cumulative increase (decrease) in fair value of hedged liability in fair value hedge, attributable to hedged risk, remaining after discontinued hedge. + References Reference 1: 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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