Segment and Geographic Information (Tables)

12 Months Ended

Sep. 30, 2023

Segment Reporting [Abstract]

Schedule of Segment Reporting Information

Information for the reportable segments is shown in accordance with the Segment Reporting Topic of the ASC as follows:

	Year Ended September 30,
(in millions)	2023		2022		2021
Total revenues:
Commercial	$	58,249.2	$	63,743.2	$	39,884.0
Institutional	1,513.6		831.8		668.4
Retail	888.5		1,304.2		1,859.9
Global Payments	212.6		172.0		137.3
Corporate Unallocated	31.7		7.8		1.7
Eliminations	(39.5)		(23.0)		(17.1)
Total	$	60,856.1	$	66,036.0	$	42,534.2
Operating revenues:
Commercial	$	862.7	$	692.1	$	534.8
Institutional	1,513.6		831.8		668.4
Retail	333.0		426.7		348.0
Global Payments	212.6		172.0		137.3
Corporate Unallocated	31.7		7.8		1.7
Eliminations	(39.5)		(23.0)		(17.1)
Total	$	2,914.1	$	2,107.4	$	1,673.1
Net operating revenues (loss):
Commercial	$	721.3	$	586.5	$	433.1
Institutional	532.0		483.5		419.4
Retail	227.3		302.9		222.4
Global Payments	203.3		162.5		129.9
Corporate Unallocated	(62.9)		(59.5)		(54.8)
Total	$	1,621.0	$	1,475.9	$	1,150.0
Net contribution:
(Revenues less cost of sales of physical commodities, transaction-based clearing expenses, variable compensation, introducing broker commissions and interest expense)
Commercial	$	544.9	$	415.3	$	299.7
Institutional	351.5		295.1		260.9
Retail	212.7		280.3		204.4
Global Payments	164.5		131.2		103.7
Total	$	1,273.6	$	1,121.9	$	868.7
Segment income:
(Net contribution less non-variable direct segment costs)
Commercial (1)	$	390.7	$	288.3	$	192.2
Institutional	217.9		174.6		167.7
Retail	45.8		115.4		67.8
Global Payments	109.1		97.4		78.5
Total	$	763.5	$	675.7	$	506.2
Reconciliation of segment income to income before tax:
Segment income	$	763.5	$	675.7	$	506.2
Net costs not allocated to operating segments	(463.8)		(398.5)		(355.5)
Gain on acquisitions and other gains, net	23.3		—		3.4
Income before tax	$	323.0	$	277.2	$	154.1

(in millions)	As of September 30, 2023		As of September 30, 2022		As of September 30, 2021
Total assets:
Commercial	$	4,676.3	$	5,931.0	$	3,969.9
Institutional	15,059.3		11,687.1		12,403.3
Retail	1,014.2		971.2		1,380.9
Global Payments	376.6		524.0		243.8
Corporate unallocated	812.3		746.3		841.7
Total	$	21,938.7	$	19,859.6	$	18,839.6

Schedule of Revenue Long-Lived Assets, by Geographical Areas

Information regarding revenues and operating revenues for the ended September 30, 2023, 2022, and 2021, and information regarding long-lived assets (defined as property, equipment, leasehold improvements and software) as of September 30, 2023, 2022, and 2021 in geographic areas were as follows:

	Year Ended September 30,
(in millions)	2023		2022		2021
Total revenues:
United States	$	6,017.4	$	5,102.3	$	3,313.1
Europe	3,498.9		3,440.2		1,889.6
South America	271.4		87.2		64.5
Middle East and Asia	51,023.6		57,395.5		37,259.1
Other	44.8		10.8		7.9
Total	$	60,856.1	$	66,036.0	$	42,534.2
Operating revenues:
United States	$	2,120.4	$	1,448.2	$	1,157.4
Europe	494.3		474.6		371.3
South America	127.0		87.2		64.5
Middle East and Asia	127.6		86.6		72.0
Other	44.8		10.8		7.9
Total	$	2,914.1	$	2,107.4	$	1,673.1
(in millions)	As of September 30, 2023		As of September 30, 2022		As of September 30, 2021
Long-lived assets, as defined:
United States	$	76.0	$	67.9	$	54.1
Europe	40.7		41.1		36.0
South America	4.4		2.9		2.1
Middle East and Asia	2.4		1.0		0.9
Other	—		—		0.2
Total	$	123.5	$	112.9	$	93.3