v3.26.1
Segment Data (Schedule of Segment Sales and Profitability) (Details) - USD ($)
 3 Months Ended 6 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Segment Reporting Information [Line Items]          
Revenues $ 519,500,000 $ 516,600,000 $ 942,300,000 $ 931,700,000  
Operating income (loss) 18,400,000 49,000,000.0 (500,000) 58,300,000  
General Corporate and Other Expenses (25,600,000) (25,000,000.0) (49,700,000) (45,900,000)  
Amortization of Intangible Assets (6,400,000) (6,400,000) (12,800,000)   $ (12,800,000)
Interest Expense and Other Nonoperating (Income) Expense, Net (10,600,000) (18,200,000) (30,600,000) (39,300,000)  
Restructuring and related costs 23,000,000.0 11,800,000 47,400,000 15,900,000  
Acquisition and integration costs 0 0 0 (500,000)  
Sun Care reformulation costs 1,700,000 700,000 2,700,000 1,700,000  
Gain (Loss) Related to Litigation Settlement (4,700,000) 0 (5,700,000) 0  
Gain (Loss) on Investments 0 0 1,500,000 900,000  
Commercial realignment   3,100,000   3,100,000  
Other Cost and Expense, Operating (1,400,000) (800,000) (1,500,000) (3,600,000)  
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest 7,900,000 31,400,000 (29,000,000.0) 18,700,000  
Cost of Product and Service Sold 302,600,000 279,700,000 564,400,000 522,300,000  
Cost of products sold for segments 291,000,000.0 275,000,000.0 545,400,000 515,400,000  
Other operating expenses 147,200,000 144,200,000 277,000,000.0 275,700,000  
Restructuring Charges, including amounts included in Cost of Products Sold (8,700,000)   (14,500,000)    
Selling, general and administrative expenses          
Segment Reporting Information [Line Items]          
Acquisition and integration costs       (500,000)  
Other Cost and Expense, Operating     2,200,000 2,400,000  
Restructuring Charges, Including Amounts in Selling, General and Administrative Expenses (300,000)   (800,000)    
Other Nonoperating Income (Expense)          
Segment Reporting Information [Line Items]          
Other Cost and Expense, Operating 200,000 600,000      
Other expense (income), net          
Segment Reporting Information [Line Items]          
Other Cost and Expense, Operating 1,600,000 1,400,000 700,000 (1,200,000)  
Wet Shave          
Segment Reporting Information [Line Items]          
Revenues 294,100,000 285,500,000 585,400,000 580,000,000.0  
Operating income (loss) 33,700,000 46,600,000 75,900,000 93,200,000  
Cost of Product and Service Sold 171,600,000 151,500,000 343,200,000 317,700,000  
Other operating expenses 88,800,000 87,400,000 166,300,000 169,100,000  
Sun and Skin Care          
Segment Reporting Information [Line Items]          
Revenues 225,400,000 231,100,000 356,900,000 351,700,000  
Operating income (loss) 47,600,000 50,800,000 44,000,000.0 47,400,000  
Cost of Product and Service Sold 119,400,000 123,500,000 202,200,000 197,700,000  
Other operating expenses 58,400,000 56,800,000 110,700,000 106,600,000  
segment profit          
Segment Reporting Information [Line Items]          
Operating income (loss) $ 81,300,000 $ 97,400,000 119,900,000 140,600,000  
Total Segments          
Segment Reporting Information [Line Items]          
Amortization of Intangible Assets     $ (12,800,000) $ (12,800,000)