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INTANGIBLE ASSETS, NET
6 Months Ended
Mar. 31, 2026
Goodwill and Intangible Assets Disclosure [Abstract]  
INTANGIBLE ASSETS, NET INTANGIBLE ASSETS, NET
March 31, 2026September 30, 2025
Carrying
Amount
Accumulated
Amortization
Net
Amount
Carrying
Amount
Accumulated
Amortization
Net
Amount
Customer relationships$160.8 $(107.8)$53.0 $160.8 $(103.4)$57.4 
Trademarks and brands164.5 (101.0)63.5 164.5 (96.9)67.6 
Other intangible assets3.1 (3.1)— 3.1 (3.1)— 
   Intangible assets, net$328.4 $(211.9)$116.5 $328.4 $(203.4)$125.0