Debt - Narrative (Details) - USD ($)	9 Months Ended
Sep. 30, 2025	Dec. 31, 2024
Line of Credit Facility [Line Items]
Other short-term debt	$ 1,667,000,000	$ 3,027,000,000
India Subsidiaries
Line of Credit Facility [Line Items]
Maximum borrowing capacity	14,000,000
Amount of debt outstanding	0
Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity	3,900,000,000
Additional borrowing capacity	1,000,000,000
Amount of debt outstanding	0
Currently available for borrowing	3,900,000,000
Amount required to stop broker-dealer subsidiary commitments	173,000,000
Funds available to use for working capital and general and corporate purposes	$ 3,300,000,000
Revolving Credit Facility \| Commercial Paper
Line of Credit Facility [Line Items]
Weighted average interest rate	4.20%
Other short-term debt	$ 417,000,000
Repayments of commercial paper	$ (112,000,000)
Weighted average remaining maturity	15 days
Revolving Credit Facility \| Commercial Paper \| Minimum
Line of Credit Facility [Line Items]
Debt instrument, term	6 years
Revolving Credit Facility \| Commercial Paper \| Maximum
Line of Credit Facility [Line Items]
Debt instrument, term	28 years
Senior Notes
Line of Credit Facility [Line Items]
Debt instrument, face amount	$ 18,600,000,000
Debt instrument, term	14 years
Weighted average interest rate	3.70%
Senior Notes \| 2031 Senior Notes (5.25%; unsecured due June 15, 2031)
Line of Credit Facility [Line Items]
Interest rate, stated percentage	5.25%
Senior notes	$ 744,000,000	743,000,000
Senior Notes \| 2028 Senior Notes (3.625%; unsecured due September 1, 2028)
Line of Credit Facility [Line Items]
Interest rate, stated percentage	3.625%
Senior notes	$ 950,000,000	$ 937,000,000

Debt Instrument, Average Remaining Maturity

No definition available.

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- Definition

Line of Credit Facility, Additional Borrowing Capacity

+ References

No definition available.

+ Details

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- Definition

Line of Credit Facility, Unreserved Amount

+ References

No definition available.

+ Details

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- Definition

Line of Credit facility, Amount Required to Stop Broker-Dealer Subsidiary Commitments

+ References

No definition available.

+ Details

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- Definition

Unsecured short-term debt instrument issued by corporations which are highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

+ References

No definition available.

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Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

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- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

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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

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Balance Type:	credit
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- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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- Definition

Carrying value as of the balance sheet date of uncollateralized debt obligation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

+ References

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