Securitization Activities - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025	Dec. 31, 2025
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Assets securitized in a non-cash exchange for loans and investments	$ 204	$ 210	$ 388	$ 343
Retained Interests	8,374		8,374		$ 6,458
Notional amount related to other continuing involvement	4,100		4,100		4,130
Seller financing related to loans sold	806		868	340
Loans sold	1,130		1,210	425
Proceeds from collection of finance receivables	239	$ 172	319	$ 370
Outstanding Principal Amount	205,860		205,860		192,909
Retained interest	8,230		8,230		6,370
Corporate debt and other asset-backed
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Retained Interests	596		596		511
Outstanding Principal Amount	13,671		13,671		13,904
Corporate debt and other asset-backed \| Installment
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Outstanding Principal Amount	1,770		1,770		1,180
Derivatives And Commitments
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Retained Interests	1,400		1,400		1,480
Other retained interests
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]
Retained interest	562		$ 562		$ 506
Weighted average life (years)			5 years 7 months 6 days		4 years 1 month 6 days
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of Other than 10 or 20 Percent Adverse Change in Other Assumption	$ 596		$ 596		$ 511

Notional amount related to Other Continuing Involvement.

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- Definition

Seller Financing Receivable

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- Definition

Weighted-average life of securitized asset regardless of when transfer occurred, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Amount of beneficial interest received as consideration for transferring noncash financial asset. Includes, but is not limited to, trade receivable in securitization transaction.

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Principal amount of transferred financial assets in which the transferor has continuing involvement with the assets underlying the transaction. Continuing involvement includes, but is not limited to, servicing, recourse, and restrictions on transferor's interests in transferred financial assets.

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- Definition

Amount of decrease in financing receivable from sale. Excludes net investment in lease.

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The carrying amount (fair value) as of the balance sheet date of the transferor's interests in transferred financial assets (typically securitized receivables, generally not involved in the collection of principal) following transfer of significant portions of such financial instruments to other parties. Such interests could be ancillary cash flows and interest-only strips.

+ References

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The cash inflow associated with the collection of receivables arising from the financing of goods and services.

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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.

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Fair value portion of interest continued to be held by a transferor after transferring financial assets to a third party.

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The hypothetical financial impact of a specified adverse percentage change in a specified other assumption on the fair value of transferor's interests in transferred financial assets (including any servicing assets or servicing liabilities).

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