v3.26.1
Segments - Schedule of Segment Reporting Information, by Segment (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]          
Net sales $ 734.1 $ 725.3   $ 2,156.3 $ 2,119.9
Cost of products sold 453.5 325.6   1,360.3 1,191.6
Advertising and sales promotion expense 41.7 43.4   109.9 117.6
Earnings (loss) before income taxes 49.8 164.2   66.7 230.7
Depreciation and amortization       92.6 94.6
Restructuring and related costs (14.4) (8.0)   (76.8) (45.9)
Acquisition and integration costs   (1.3)   (2.4) (4.8)
Amortization of intangible assets (12.5) (14.7)   (39.0) (44.1)
Loss on extinguishment/modification of debt 0.0 0.0 $ (5.2) (0.9) (5.3)
Other items, net 0.2 (0.1)   0.2 (0.1)
Operating Segments          
Segment Reporting [Line Items]          
Net sales 734.1 725.3   2,156.3 2,119.9
Cost of products sold 446.0 400.3   1,310.4 1,231.5
Advertising and sales promotion expense 41.7 43.4   109.9 117.6
Other segment items 97.8 98.7   310.3 300.6
Earnings (loss) before income taxes 148.6 182.9   425.7 470.2
Depreciation and amortization 17.4 17.2   53.6 50.5
Operating Segments | Batteries & Lights          
Segment Reporting [Line Items]          
Net sales 524.2 535.1   1,682.6 1,655.5
Cost of products sold 301.6 279.3   991.5 943.8
Advertising and sales promotion expense 24.3 23.4   80.1 85.1
Other segment items 70.4 73.6   243.7 236.2
Earnings (loss) before income taxes 127.9 158.8   367.3 390.4
Depreciation and amortization 13.5 13.7   43.2 40.6
Operating Segments | Auto Care          
Segment Reporting [Line Items]          
Net sales 209.9 190.2   473.7 464.4
Cost of products sold 144.4 121.0   318.9 287.7
Advertising and sales promotion expense 17.4 20.0   29.8 32.5
Other segment items 27.4 25.1   66.6 64.4
Earnings (loss) before income taxes 20.7 24.1   58.4 79.8
Depreciation and amortization 3.9 3.5   10.4 9.9
Corporate          
Segment Reporting [Line Items]          
General corporate and other expenses (31.7) (33.1)   (94.9) (91.0)
Restructuring and related costs (14.4) (8.0)   (76.8) (45.9)
Network transition costs 0.0 (0.9)   0.0 (17.6)
Government assistance, production credit 0.0 78.5   0.0 78.5
Acquisition and integration costs (0.3) (1.3)   (2.4) (4.8)
Litigation matter 0.0 1.7   0.0 1.7
Amortization of intangible assets (12.5) (14.7)   (39.0) (44.1)
Interest expense (39.7) (39.0)   (118.1) (114.0)
Loss on extinguishment/modification of debt 0.0 0.0   (0.9) (5.3)
Settlement loss on U.K. pension plan termination (0.2) 0.0   (26.3) 0.0
Other items - Adjusted (8) 0.0 1.9   0.6 (3.0)
Corporate | Other restructuring related costs          
Segment Reporting [Line Items]          
Restructuring and related costs $ 0.0 $ 0.0   $ 0.0 $ 0.3