v3.23.1
Segments - Schedule of Segment Reporting Information, by Segment (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2023
Mar. 31, 2022
Mar. 31, 2021
Segment Reporting Information [Line Items]          
Net sales $ 684.1 $ 685.4 $ 1,449.2 $ 1,531.7  
Segment Profit 253.3 238.4 551.6 550.0  
Amortization of intangible assets (14.5) (15.2) (30.5) (30.4)  
Restructuring costs 7.5 0.0 14.1 5.3  
Exit of Russian market 0.0 7.5 0.0 7.5  
Loss on extinguishment of debt (0.9) 0.0 2.0 0.0  
Other items, net (0.8) 1.5 0.6 1.3  
Net (loss)/earnings 50.4 28.0 112.7 104.5  
Depreciation and amortization 30.4 29.2 62.5 58.6  
Project Momentum Restructuring          
Segment Reporting Information [Line Items]          
Restructuring costs 7.5 0.0 14.1 0.0  
Charge to Income     14.1    
Exit Of Russian Market | Segment Reconciling Items          
Segment Reporting Information [Line Items]          
Exit of Russian market 0.0 (14.0) 0.0 (14.0)  
Batteries & Lights          
Segment Reporting Information [Line Items]          
Restructuring costs 6.8   12.6 5.1  
Auto Care          
Segment Reporting Information [Line Items]          
Restructuring costs 0.7   1.5 0.2  
Operating Segments          
Segment Reporting Information [Line Items]          
Segment Profit 143.9 119.6 292.8 287.8  
Depreciation and amortization 15.9 14.0 32.0 28.2  
Operating Segments | Batteries & Lights          
Segment Reporting Information [Line Items]          
Net sales 505.9 516.5 1,177.5 1,256.7  
Segment Profit 114.5 95.3 252.8 263.7  
Depreciation and amortization 13.1 11.7 26.5 23.9  
Operating Segments | Auto Care          
Segment Reporting Information [Line Items]          
Net sales 178.2 168.9 271.7 275.0  
Segment Profit 29.4 24.3 40.0 24.1  
Depreciation and amortization 2.8 2.3 5.5 4.3  
Segment Reconciling Items          
Segment Reporting Information [Line Items]          
General corporate and other expenses (27.8) (25.6) (53.2) (47.3)  
Amortization of intangible assets (14.5) (15.2) (30.5) (30.4)  
Acquisition and integration costs 0.0 0.0 0.0 16.5  
Acquisition earn out 0.0 0.0 0.0 (1.1)  
Interest expense (42.0) (38.3) (84.9) (75.3)  
Depreciation and amortization 14.5 15.2 30.5 30.4  
Segment Reconciling Items | Project Momentum Restructuring          
Segment Reporting Information [Line Items]          
Restructuring costs (7.5) 0.0 (14.1) 0.0  
Costs of products sold          
Segment Reporting Information [Line Items]          
Acquisition and integration costs       6.0  
Costs of products sold | Project Momentum Restructuring          
Segment Reporting Information [Line Items]          
Charge to Income 5.7   6.0    
Costs of products sold | Exit Of Russian Market          
Segment Reporting Information [Line Items]          
Exit of Russian market   0.7      
Selling, general and administrate expense          
Segment Reporting Information [Line Items]          
Acquisition and integration costs         $ 9.4
Selling, general and administrate expense | Project Momentum Restructuring          
Segment Reporting Information [Line Items]          
Charge to Income $ 1.8   $ 8.1    
Selling, general and administrate expense | Exit Of Russian Market          
Segment Reporting Information [Line Items]          
Exit of Russian market   5.8      
Research and development expense          
Segment Reporting Information [Line Items]          
Acquisition and integration costs   1.1   $ 1.1  
Other Expense | Exit Of Russian Market          
Segment Reporting Information [Line Items]          
Exit of Russian market   $ 7.5