Receivables and Revenue - Additional Information (Detail) - USD ($) $ in Millions	Sep. 27, 2024	Dec. 31, 2023	Dec. 31, 2022
Receivables And Revenue [Line Items]
Receivables from clients collateral	$ 4,874	$ 4,231
Collateral held for securities purchased under agreements to resell	747	1,158
Expected credit loss on partnership loans	0	0
Receivable from mutual fund, insurance companies and other	935	891
Expected credit loss for receivables from contracts with customers	0	0
Expected credit loss for receivables from clients and securities purchased under agreement to resell	0	0
Customer Contracts [Member]
Receivables And Revenue [Line Items]
Receivable from clients balance	859	732	$ 637
Receivable from mutual fund, insurance companies and other	$ 367	$ 343	$ 328

Expected credit loss for receivables from clients and securities purchased under agreement to resell.

No definition available.

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- Definition

Expected credit loss for receivables from contracts with customers.

+ References

No definition available.

+ Details

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- Definition

Partnership loans expected credit loss.

+ References

No definition available.

+ Details

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- Definition

Amount due from mutual funds, insurance companies and other for fees and charges arising from transactions related to the entity's brokerage activities and operations.

+ References

No definition available.

+ Details

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- Definition

Receivables and revenue.

+ References

No definition available.

+ Details

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- Definition

Revenue from contract with customer receivables.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Fair value as of the balance sheet date of customer securities accepted as collateral by the entity that it is permitted by contract or custom to sell or re-pledge to counterparties as collateral.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 50
-Paragraph 1A
-Subparagraph (c)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481420/860-30-50-1A

+ Details

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Period Type:	instant

- Definition

Fair value of securities received as collateral against securities purchased under agreement to resell.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 12
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483444/210-20-55-12

+ Details

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- Details

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