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SEGMENT REPORTING (Tables)

12 Months Ended

Dec. 31, 2024

Segment Reporting [Abstract]

Summarized financial data of reportable segments

Summarized financial data of reportable segments was as follows (in millions):

			Year Ended December 31,
			2024
			Options						North American Equities						Europe and Asia Pacific						Futures						Global FX						Digital						Corporate Items and Eliminations						Total
Revenues			$	2,002.6					$	1,546.8					$	324.2					$	141.1					$	79.9					$	(0.1)					$	—					$	4,094.5
Cost of revenues			743.3						1,163.0						104.0						7.6						2.3						1.9						—						2,022.1
Revenues less cost of revenues (a)			1,259.3						383.8						220.2						133.5						77.6						(2.0)						—						2,072.4
Depreciation and amortization (b)			27.0						58.2						29.3						2.3						13.5						2.8						(0.1)						133.0
Other segment operating expenses (c)			353.9						157.0						149.2						32.3						30.9						107.6						10.1						841.0
Operating income (loss)			$	878.4					$	168.6					$	41.7					$	98.9					$	33.2					$	(112.4)					$	(10.0)					$	1,098.4
Non-operating (expenses) income:
Interest expense (d)			$	0.1					$	—					$	(7.8)					$	—					$	—					$	—					$	(43.8)					$	(51.5)
Interest income (d)			0.5						2.4						4.1						—						0.1						3.7						16.5						27.3
Earnings on investments (d)			—						—						—						—						—						—						29.0						29.0
Other (expense) income, net (d)			0.8						0.7						(0.1)						—						—						1.5						(22.3)						(19.4)
Income before income tax provision			879.8						171.7						37.9						98.9						33.3						(107.2)						(30.6)						1,083.8
Income tax provision (benefit) (e)			299.1						23.1						13.3						28.4						0.1						(28.6)						(16.5)						318.9
Net income (loss) (f)			$	580.7					$	148.6					$	24.6					$	70.5					$	33.2					$	(78.6)					$	(14.1)					$	764.9
			Year Ended December 31,
			2023
			Options						North American Equities						Europe and Asia Pacific						Futures						Global FX						Digital						Corporate Items and Eliminations						Total
Revenues			$	1,939.5					$	1,353.0					$	281.2					$	129.0					$	74.9					$	(4.1)					$	—					$	3,773.5
Cost of revenues			770.3						987.7						91.0						3.9						1.4						1.2						—						1,855.5
Revenues less cost of revenues (a)			1,169.2						365.3						190.2						125.1						73.5						(5.3)						—						1,918.0
Depreciation and amortization (b)			30.1						69.4						30.7						2.0						18.4						7.4						—						158.0
Other segment operating expenses (c)			287.8						177.9						126.8						37.0						30.4						34.0						8.2						702.1
Operating income (loss)			$	851.3					$	118.0					$	32.7					$	86.1					$	24.7					$	(46.7)					$	(8.2)					$	1,057.9
Non-operating (expenses) income:
Interest expense (d)			$	0.2					$	—					$	(7.8)					$	—					$	—					$	—					$	(54.8)					$	(62.4)
Interest income (d)			(0.1)						1.4						3.0						—						—						2.0						5.7						12.0
Earnings on investments (d)			—						—						—						—						—						—						39.5						39.5
Other (expense) income, net (d)			(0.1)						—						(0.6)						—						(0.2)						—						1.5						0.6
Income before income tax provision			851.3						119.4						27.3						86.1						24.5						(44.7)						(16.3)						1,047.6
Income tax provision (benefit) (e)			275.7						14.8						6.8						33.4						0.5						(10.4)						(34.6)						286.2
Net income (loss) (f)			$	575.6					$	104.6					$	20.5					$	52.7					$	24.0					$	(34.3)					$	18.3					$	761.4

Summarized financial data of reportable segments was as follows (in millions) (continued from previous page):

			Year Ended December 31,
			2022
			Options						North American Equities						Europe and Asia Pacific						Futures						Global FX						Digital						Corporate Items and Eliminations						Total
Revenues			$	1,823.2					$	1,681.7					$	264.6					$	119.8					$	68.9					$	0.3					$	—					$	3,958.5
Cost of revenues			840.0						1,302.8						68.5						3.8						1.0						0.7						—						2,216.8
Revenues less cost of revenues (a)			983.2						378.9						196.1						116.0						67.9						(0.4)						—						1,741.7
Depreciation and amortization (b)			26.5						74.1						37.0						2.6						21.9						4.7						—						166.8
Other segment operating expenses (c)			216.2						158.2						121.0						58.2						37.2						486.3						8.2						1,085.3
Operating income (loss)			$	740.5					$	146.6					$	38.1					$	55.2					$	8.8					$	(491.4)					$	(8.2)					$	489.6
Non-operating (expenses) income:
Interest expense (d)			$	—					$	—					$	(8.8)					$	—					$	0.3					$	—					$	(51.5)					$	(60.0)
Interest income (d)			—						0.4						0.8						—						0.1						—						2.3						3.6
Earnings on investments (d)			—						—						—						—						—						—						7.2						7.2
Other (expense) income, net (d)			0.1						(0.1)						(0.4)						—						—						1.3						(8.4)						(7.5)
Income before income tax provision			740.6						146.9						29.7						55.2						9.2						(490.1)						(58.6)						432.9
Income tax provision (benefit) (e)			260.7						20.5						6.8						42.4						0.1						(119.0)						(13.6)						197.9
Net income (loss) (f)			$	479.9					$	126.4					$	22.9					$	12.8					$	9.1					$	(371.1)					$	(45.0)					$	235.0

__________________________________________________________

(a) Revenues less cost of revenues by segment is a measure that is regularly provided to the CODM, as well as a component of operating income (loss).

(b) Depreciation and amortization at the segment-level is not regularly provided to the CODM, however depreciation and amortization is a component of operating income (loss) and identified as a "specific profit or loss" item in accordance with guidance, and therefore has been disclosed separately.

(c) Other segment operating expenses includes compensation and benefits, technology support services, professional fees and outside services, travel and promotional expenses, facilities costs, acquisition-related costs, impairment of intangible assets, impairment of goodwill, and other expenses. The disaggregation of expenses is not regularly provided to the CODM at the segment-level.

(d) Non-operating (expenses) income at the segment-level is not regularly provided to the CODM, however non-operating (expenses) income is a component of a measure that is regularly provided to the CODM and the components of non-operating (expenses) income included above are identified as "specific profit or loss" items in accordance with guidance, and therefore have been disclosed separately.

(e) Income tax provision (benefit) at the segment-level is not regularly provided to the CODM, however income tax provision (benefit) is a component of a measure that is regularly provided to the CODM and identified as a "specific profit or loss" item in accordance with guidance, and therefore has been disclosed separately.

(f) Net income (loss) at the segment-level is not regularly provided to the CODM, however net income (loss) is a component of a measure that is regularly provided to the CODM, and therefore has been disclosed separately.

Schedule of revenues less cost of revenues by primary jurisdiction

The following summarizes revenues less cost of revenues based on primary jurisdiction (in millions):

			United States						Non-U.S.						Total
Revenues less cost of revenues:
Year ended December 31, 2024			$	1,817.6					$	254.8					$	2,072.4
Year ended December 31, 2023			$	1,681.8					$	236.2					$	1,918.0
Year ended December 31, 2022			$	1,531.3					$	210.4					$	1,741.7

X

- Definition

Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer.

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- Definition

Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

+ References

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-Name Accounting Standards Codification
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