Revenue from Contracts with Clients Disaggregation of Revenues Table (Tables)

9 Months Ended

Jun. 30, 2020

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue [Table Text Block]

	Three Months Ended June 30,				Nine Months Ended June 30,
	2020		2019		2020		2019
Revenues from contracts with clients:
Commission and clearing fees:
Sales-based:
Exchange-traded futures and options	$	36.4	$	40.4	$	108.9	$	110.7
OTC derivative brokerage	4.0		7.7		16.2		23.9
Equities and fixed income	5.2		4.3		16.6		11.1
Mutual funds	1.1		1.6		4.0		6.1
Insurance and annuity products	1.7		2.1		6.2		5.1
Other	0.3		0.3		1.1		1.0
Total sales-based commission	48.7		56.4		153.0		157.9
Trailing:
Mutual funds	3.1		3.1		9.7		9.3
Insurance and annuity products	3.6		3.6		11.3		10.7
Total trailing commission	6.7		6.7		21.0		20.0
Clearing fees	33.3		30.3		104.4		89.7
Trade conversion fees	1.8		1.3		7.5		6.2
Other	5.6		2.8		14.0		8.3
Total commission and clearing fees:	96.1		97.5		299.9		282.1
Consulting, management, and account fees:
Underwriting fees	—		0.2		0.4		0.7
Asset management fees	7.0		7.2		23.2		19.4
Advisory and consulting fees	5.7		5.1		17.0		14.8
Sweep program fees	1.0		4.2		8.6		12.1
Client account fees	2.8		2.6		8.9		7.8
Other	2.9		1.4		5.2		4.1
Total consulting, management, and account fees	19.4		20.7		63.3		58.9
Total revenues from contracts with clients	$	115.5	$	118.2	$	363.2	$	341.0
Method of revenue recognition:
Point-in-time	$	95.1	$	95.0	$	293.4	$	274.7
Time elapsed	20.4		23.2		69.8		66.3
Total revenues from contracts with clients	115.5		118.2		363.2		341.0
Other sources of revenues
Physical precious metals trading	7,621.2		7,327.8		37,973.9		19,944.2
Physical agricultural and energy product trading	323.3		271.5		965.5		880.4
Principal gains, net	161.0		102.3		442.0		305.4
Interest income	22.4		53.2		110.1		146.4
Total revenues	$	8,243.4	$	7,873.0	$	39,854.7	$	21,617.4
Primary geographic region:
United States	$	554.2	$	474.8	$	1,652.1	$	1,458.4
Europe	114.1		77.8		375.7		184.9
South America	14.6		15.3		46.1		39.2
Middle East and Asia	7,558.5		7,303.8		37,777.3		19,929.7
Other	2.0		1.3		3.5		5.2
Total revenues	$	8,243.4	$	7,873.0	$	39,854.7	$	21,617.4