v3.26.1
Segment and Geographical Data (Schedule of Segment Disclosures) (Details) - USD ($)
 3 Months Ended 9 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Sep. 30, 2025
Segment Reporting Information [Line Items]          
Net sales $ 570,100,000 $ 560,400,000 $ 1,512,400,000 $ 1,492,100,000  
Cost of products sold for segments 315,200,000 309,600,000 861,400,000 825,100,000  
Operating Income (Loss) 25,000,000.0 45,000,000.0 24,500,000 103,200,000  
General corporate and other expenses (21,900,000) (19,900,000) (66,000,000.0) (65,900,000)  
Restructuring and related costs 24,500,000 16,800,000 71,900,000 32,700,000  
Acquisition integration costs 0 0 0 500,000  
Sun Care reformulation costs EPC       (2,200,000)  
Legal settlement 0 0 (5,700,000) 0  
Amortization of Intangible Assets (6,200,000) (6,400,000) (19,100,000) (19,200,000)  
Interest Expense and Other Nonoperating (Income) Expense, Net 7,000,000.0 19,300,000 37,700,000 58,600,000  
Earnings (loss) before income taxes 18,000,000.0 28,500,000 (11,000,000.0) 47,100,000  
Depreciation, Depletion and Amortization     59,000,000.0 65,600,000  
Total assets 3,535,400,000   3,535,400,000   $ 3,756,300,000
Segment, Expenditure, Addition to Long-Lived Assets 15,700,000 15,300,000 40,100,000 46,200,000  
Gain (Loss) on Investments 0 0 (1,500,000) (900,000)  
Commercial realignment 200,000 (100,000) 200,000 3,000,000.0  
Goodwill, Impairment Loss     37,400,000 0  
Other project and related costs (3,000,000.0) 1,200,000 (4,500,000) (2,400,000)  
Cost of products sold 327,600,000 310,300,000 892,000,000.0 832,700,000  
Other operating expenses 173,800,000 160,700,000 455,500,000 436,300,000  
Sun Care reformulation costs (700,000) (500,000) (3,400,000) (2,200,000)  
TransitionServicesIncome 7,700,000   14,400,000    
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Feminine Care          
Segment Reporting Information [Line Items]          
Capital Expenditure, Discontinued Operations 0 200,000 1,200,000 3,200,000  
Continuing Operations          
Segment Reporting Information [Line Items]          
Depreciation, Depletion and Amortization 18,600,000 18,300,000 57,700,000 54,000,000.0  
Wet Shave          
Segment Reporting Information [Line Items]          
Net sales 312,800,000 317,000,000.0 898,200,000 897,000,000.0  
Operating Income (Loss) 34,900,000 44,100,000 106,000,000.0 137,300,000  
Earnings (loss) before income taxes 18,000,000.0 28,500,000 (11,000,000.0) 47,100,000  
Segment, Expenditure, Addition to Long-Lived Assets 11,000,000.0 9,900,000 27,700,000 28,700,000  
Cost of products sold 174,300,000 179,300,000 517,900,000 497,100,000  
Other operating expenses 103,600,000 93,600,000 274,300,000 262,600,000  
Wet Shave | Continuing Operations          
Segment Reporting Information [Line Items]          
Depreciation, Depletion and Amortization 10,000,000.0 8,700,000 31,100,000 28,700,000  
Sun and Skin Care          
Segment Reporting Information [Line Items]          
Net sales 257,300,000 243,400,000 614,200,000 595,100,000  
Operating Income (Loss) 46,200,000 46,000,000.0 89,500,000 93,400,000  
Segment, Expenditure, Addition to Long-Lived Assets 4,700,000 5,400,000 12,400,000 17,500,000  
Cost of products sold 140,900,000 130,300,000 343,500,000 328,000,000.0  
Other operating expenses 70,200,000 67,100,000 181,200,000 173,700,000  
Sun and Skin Care | Continuing Operations          
Segment Reporting Information [Line Items]          
Depreciation, Depletion and Amortization 2,100,000 1,400,000 5,500,000 6,200,000  
Corporate          
Segment Reporting Information [Line Items]          
Amortization of Intangible Assets     (19,000,000.0) (19,200,000)  
Corporate | Continuing Operations          
Segment Reporting Information [Line Items]          
Depreciation, Depletion and Amortization 6,500,000 8,200,000 21,100,000 19,100,000  
segment profit          
Segment Reporting Information [Line Items]          
Operating Income (Loss) 81,100,000 90,100,000 195,500,000 230,700,000  
Selling, general and administrative expense          
Segment Reporting Information [Line Items]          
Acquisition integration costs       500,000  
Restructuring Charges, Including Amounts in Selling, General and Administrative Expenses     (25,700,000)    
Other Nonoperating Income (Expense)          
Segment Reporting Information [Line Items]          
Other project and related costs   2,700,000 700,000 1,500,000  
Nonoperating Income (Expense)          
Segment Reporting Information [Line Items]          
Other project and related costs $ 2,900,000 $ 1,500,000 $ 5,100,000 $ 3,900,000