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Financial Derivatives (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Derivative [Line Items]
Cash and securities held to collateralize net derivative assets	$ 1,700		$ 1,700
Cash and securities pledged to collateralize net derivative liabilities	1,700		1,700
Gain (loss) on net investment hedge derivatives	$ 28	$ (68)	(96)	$ (59)
Cash flow hedges | Interest rate contracts
Derivative [Line Items]
Cash flow hedge loss to be reclassified within twelve months			111
Cash flow hedge loss to be reclassified within twelve months, net of tax			$ 85
Maximum length of time hedged in cash flow hedge			7 years

X

- Definition

Represents amount of cash, and if applicable, U.S. government securities and/or mortgage-backed securities, held under master netting and other collateral agreements to collateralize net derivative assets due from counterparties.

+ References

No definition available.

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- Definition

Represents amount of cash, and if applicable, U.S. government securities and/or mortgage-backed securities, pledged under master netting and other collateral agreements to collateralize net derivative liabilities owed to counterparties.

+ References

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- Definition

Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months, Net of Tax

+ References

No definition available.

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- Definition

The estimated net amount of existing gains or losses on cash flow hedges at the reporting date expected to be reclassified to earnings within the next 12 months.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480870/815-30-50-1

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 20
-Name Accounting Standards Codification
-Section 25
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A

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Maximum length of time over which the entity is hedging its exposure to the variability in future cash flows for forecasted transactions, excluding those forecasted transactions related to the payment of variable interest on existing financial instruments, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)
-Publisher FASB
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Amount, before tax and reclassification, of gain (loss) from derivative designated and qualifying as net investment hedge.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 182
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