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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+ Details

- Definition

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.

+ References + Details

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

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+ Details

INFORMATION ABOUT RECEIVABLES, REVENUES, AND SERVICES - Narrative (Details) - USD ($) $ in Millions				3 Months Ended		6 Months Ended
	Jun. 30, 2026	Mar. 31, 2026	Dec. 31, 2025	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Concentration Risk [Line Items]
Net revenues				$ 1,907.4	$ 1,723.3	$ 3,764.4	$ 3,487.2
Accounts receivable	$ 941.6		$ 931.2	941.6		941.6
Outside U.S. \| Assets under management \| Geographic concentration
Concentration Risk [Line Items]
Concentration risk	9.10%	8.60%	8.80%
Investment Products
Concentration Risk [Line Items]
Net revenues				1,619.6	$ 1,435.2	3,194.1	$ 2,906.5
Accounts receivable	$ 702.3		$ 664.2	$ 702.3		$ 702.3