Revenues (Tables)

12 Months Ended

Sep. 30, 2024

Revenue from Contract with Customer [Abstract]

Operating revenues by geographic area

Operating revenues by geographic area were as follows:

(in millions)	United States		Luxembourg		Asia-Pacific		Americas Excluding United States		Europe, Middle East and Africa, Excluding Luxembourg		Total
for the fiscal year ended September 30, 2024
Investment management fees	$	5,142.8	$	862.3	$	283.8	$	228.1	$	305.2	$	6,822.2
Sales and distribution fees	979.2		342.8		19.2		39.8		—		1,381.0
Shareholder servicing fees	195.3		31.7		2.2		0.1		—		229.3
Other	40.5		0.7		3.7		—		0.6		45.5
Total	$	6,357.8	$	1,237.5	$	308.9	$	268.0	$	305.8	$	8,478.0

(in millions)	United States		Luxembourg		Asia-Pacific		Americas Excluding United States		Europe, Middle East and Africa, Excluding Luxembourg		Total
for the fiscal year ended September 30, 2023
Investment management fees	$	4,877.1	$	803.9	$	285.6	$	216.2	$	270.1	$	6,452.9
Sales and distribution fees	847.3		296.0		19.8		40.6		—		1,203.7
Shareholder servicing fees	118.7		31.5		2.2		0.3		—		152.7
Other	37.7		0.8		1.2		—		0.4		40.1
Total	$	5,880.8	$	1,132.2	$	308.8	$	257.1	$	270.5	$	7,849.4

(in millions)	United States		Luxembourg		Asia-Pacific		Americas Excluding United States		Europe, Middle East and Africa, Excluding Luxembourg		Total
for the fiscal year ended September 30, 2022
Investment management fees	$	4,926.6	$	901.1	$	309.6	$	246.5	$	233.0	$	6,616.8
Sales and distribution fees	997.7		341.8		25.5		50.0		—		1,415.0
Shareholder servicing fees	153.8		36.0		1.4		0.2		1.6		193.0
Other	48.1		1.0		0.7		0.5		0.2		50.5
Total	$	6,126.2	$	1,279.9	$	337.2	$	297.2	$	234.8	$	8,275.3