Cash Flow Information - Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash Balance (Detail) - USD ($) $ in Millions	Jun. 27, 2025	Dec. 31, 2024	Jun. 28, 2024
Supplemental Cash Flow Elements [Abstract]
Cash and cash equivalents	$ 1,749	$ 2,273	$ 1,743
Cash and investments, at fair value, segregated under federal regulations	13,944	$ 15,112	13,590
Less: Investments segregated under federal regulations	8,758		9,654
Total cash, cash equivalents and restricted cash	$ 6,935		$ 5,679

Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Amount of cash subject to withdrawal restrictions, restricted deposits held as compensating balances, and cash and securities segregated in compliance with regulations (such as cash deposited in a special reserve account for the exclusive benefit of customers).

+ References

No definition available.

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- Definition

Amount of cash and cash equivalent, and cash and cash equivalent restricted to withdrawal or usage; attributable to continuing operation. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 230
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- Definition

Investments which are not defined as or included in marketable (debt, equity, or other) securities whose use is restricted in whole or in part, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet.

+ References

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-Topic 954
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