v3.26.1
Goodwill and intangible assets (Tables)
 9 Months Ended
Jun. 30, 2026
Intangible Asset, Goodwill and Other [Abstract]  
Goodwill
The following table sets forth goodwill by segment as of October 1, 2025 and June 30, 2026:

Batteries & LightsAuto CareTotal
Balance at October 1, 2025$902.7 $148.5 $1,051.2 
APS Acquisition(1.2)— (1.2)
Cumulative translation adjustment(1.9)0.4 (1.5)
Balance at June 30, 2026$899.6 $148.9 $1,048.5 
Intangible Asset, Finite-Lived
Total intangible assets at June 30, 2026 were as follows:
Gross Carrying AmountAccumulated AmortizationAccumulated ImpairmentNet Carrying Amount
Trademarks and trade names$154.9 $(52.8)$— $102.1 
Customer relationships394.9 (213.1)(0.6)181.2 
Patents34.5 (24.8)— 9.7 
Proprietary technology172.5 (145.2)— 27.3 
Proprietary formulas29.2 (18.6)(5.3)5.3 
    Total Amortizable intangible assets$786.0 $(454.5)$(5.9)325.6 
Trademarks and trade names - indefinite lived641.1 
     Total Other intangible assets, net$966.7 

Total intangible assets at September 30, 2025 were as follows:
Gross Carrying AmountAccumulated AmortizationAccumulated ImpairmentNet Carrying Amount
Trademarks and trade names$155.0 $(46.4)$— $108.6 
Customer relationships395.0 (193.3)(0.6)201.1 
Patents34.5 (23.3)— 11.2 
Proprietary technology172.5 (135.0)— 37.5 
Proprietary formulas29.2 (17.6)(5.3)6.3 
    Total Amortizable intangible assets$786.2 $(415.6)$(5.9)364.7 
Trademarks and trade names - indefinite lived640.8 
    Total Other intangible assets, net$1,005.5