v3.26.1
Goodwill and intangible assets
 9 Months Ended
Jun. 30, 2026
Intangible Asset, Goodwill and Other [Abstract]  
Goodwill and intangible assets Goodwill and intangible assets
Goodwill and intangible assets deemed to have an indefinite life are not amortized, but are evaluated annually for impairment as part of our annual business planning cycle in the fourth fiscal quarter, or when indicators of a potential impairment are present.
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 

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 

Subsequent to quarter end, the Company reviewed its Rayovac trade name as part of its annual impairment analysis which is performed as of July 1. Based on decreases in forecasted demand, increased competition and other economic factors, the trade name was determined to have a 30-year definite life. The trade name has a $337.0 book value as of June 30, 2026 and the Company will begin amortizing the intangible asset as of July 1, 2026. Prior to changing the useful life of the trade name asset, the Company tested the asset for impairment under ASC 350, Intangibles, Goodwill and Other, concluding the asset was not impaired.