v3.23.1
Goodwill and intangible assets (Tables)
 6 Months Ended
Mar. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
The following table sets forth goodwill by segment as of October 1, 2022 and March 31, 2023:

Batteries & LightsAuto CareTotal
Balance at October 1, 2022$868.9 $134.2 $1,003.1 
Cumulative translation adjustment16.4 — 16.4 
Balance at March 31, 2023$885.3 $134.2 $1,019.5 
Schedule of Finite-Lived Intangible Assets
Total intangible assets at March 31, 2023 are as follows:

Gross Carrying AmountAccumulated AmortizationNet Carrying Amount
Trademarks and trade names$142.4 $(25.5)$116.9 
Customer relationships394.3 (126.6)267.7 
Patents34.0 (16.9)17.1 
Proprietary technology172.5 (91.3)81.2 
Proprietary formulas29.2 (8.2)21.0 
Vendor relationships7.6 (7.6)— 
    Total Amortizable intangible assets780.0 (276.1)503.9 
Trademarks and trade names - indefinite lived763.4 — 763.4 
     Total Other intangible assets, net$1,543.4 $(276.1)$1,267.3 

Total intangible assets at September 30, 2022 were as follows:

Gross Carrying AmountAccumulated AmortizationNet Carrying Amount
Trademarks and trade names$141.8 $(21.4)$120.4 
Customer relationships393.5 (112.6)280.9 
Patents33.4 (15.7)17.7 
Proprietary technology172.5 (81.5)91.0 
Proprietary formulas29.2 (6.3)22.9 
Vendor relationships6.9 (6.5)0.4 
    Total Amortizable intangible assets777.3 (244.0)533.3 
Trademarks and trade names - indefinite lived762.5 — 762.5 
    Total Other intangible assets, net$1,539.8 $(244.0)$1,295.8