Segment and Geographic Information (Tables)

12 Months Ended

Sep. 30, 2019

Schedule of Segment Reporting Information, by Segment [Table Text Block]



(in millions)	As of September 30, 2019		As of September 30, 2018		As of September 30, 2017
Total assets:
Commercial Hedging	$	2,041.0	$	1,935.7	$	1,650.3
Global Payments	278.3		206.6		199.5
Securities	5,219.1		3,058.2		2,101.7
Physical Commodities	357.8		413.7		339.5
Clearing and Execution Services	1,892.1		2,109.9		1,818.9
Corporate unallocated	147.8		100.6		133.5
Total	$	9,936.1	$	7,824.7	$	6,243.4

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

Information regarding revenues and operating revenues for the years ended September 30, 2019, 2018, and 2017, and information regarding long-lived assets (defined as property, equipment, leasehold improvements and software) as of September 30, 2019, 2018, and 2017 in geographic areas were as follows:



	Year Ended September 30,
(in millions)	2019		2018		2017
Total revenues:
United States	$	1,947.6	$	1,587.6	$	1,168.0
Europe	280.2		189.6		166.9
South America	56.5		59.5		53.9
Middle East and Asia	30,606.9		25,781.4		28,030.3
Other	5.8		4.6		4.5
Total	$	32,897.0	$	27,622.7	$	29,423.6
Operating revenues:
United States	$	799.4	$	695.3	$	529.4
Europe	209.6		189.0		166.9
South America	56.5		58.0		54.0
Middle East and Asia	34.8		28.9		29.2
Other	5.8		4.6		4.5
Total	$	1,106.1	$	975.8	$	784.0

(in millions)	As of September 30, 2019		As of September 30, 2018		As of September 30, 2017
Long-lived assets, as defined:
United States	$	33.9	$	33.0	$	29.7
Europe	6.6		6.8		7.3
South America	2.1		1.4		1.5
Middle East and Asia	1.0		1.2		0.2
Other	0.3		—		—
Total	$	43.9	$	42.4	$	38.7