Revenue (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Consignment inventory	$ 28	$ 20
Accrued Exchange Fee Rebate, Current	$ 37	$ 46
All Customers [Member] [Member] \| Customer Concentration Risk \| Revenue Benchmark
Disaggregation of Revenue [Line Items]
Concentration Risk, Percentage	50.00%	48.00%	45.00%

Carrying value as of the balance sheet date of obligations incurred through that date and payable for rebates of an exchange fee some mutual funds impose on shareholders if they exchange (transfer) to another fund within the same fund group. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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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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Gross amount of inventory owned by the entity but in the hands of a customer, typically a reseller.

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