XML 106 R49.htm IDEA: XBRL DOCUMENT v3.25.3
Accumulated Other Comprehensive Income (Loss) (Tables)
 12 Months Ended
Sep. 30, 2025
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule of changes in accumulated other comprehensive income (loss) by component
Changes in accumulated other comprehensive income (loss) by component were as follows: 
(in millions)Currency
Translation
Adjustments		Unrealized
Losses on
Defined Benefit
Plans		Unrealized
Gains on
Investments		Total
as of and for the fiscal years ended
September 30, 2025, 2024 and 2023
Balance at October 1, 2022$(615.1)$(6.3)$0.4 $(621.0)
Other comprehensive income (loss)
Other comprehensive income (loss) before reclassifications, net of tax108.5 (0.6)0.2 108.1 
Reclassifications to compensation and benefits expense, net of tax— (0.7)— (0.7)
Reclassifications to net investment and other income, net of tax4.3 — — 4.3 
Total other comprehensive income (loss)112.8 (1.3)0.2 111.7 
Balance at September 30, 2023$(502.3)$(7.6)$0.6 $(509.3)
Other comprehensive income (loss)
Other comprehensive income (loss) before reclassifications, net of tax89.8 (0.3)(0.1)89.4 
Reclassifications to compensation and benefits expense, net of tax— 0.4 — 0.4 
Total other comprehensive income (loss)89.8 0.1 (0.1)89.8 
Balance at September 30, 2024$(412.5)$(7.5)$0.5 $(419.5)
Other comprehensive income (loss)
Other comprehensive income (loss) before reclassifications, net of tax(21.3)(11.3)0.1 (32.5)
Reclassifications to compensation and benefits expense, net of tax— 2.0 — 2.0 
Reclassifications to net investment and other income, net of tax2.9 — — 2.9 
Total other comprehensive income (loss)(18.4)(9.3)0.1 (27.6)
Balance at September 30, 2025$(430.9)$(16.8)$0.6 $(447.1)