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Business Segment Information - Schedule of Segment Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2024 | Apr. 30, 2023 | Apr. 30, 2024 | Apr. 30, 2023
Segment Reporting Information [Line Items] |  |  |  |
Total net sales | $ 942.6 | $ 877.4 | $ 1,874.2 | $ 1,735.9
Total operating income | 161.7 | 96.3 | 314.8 | 245.8
Interest expense | 28.9 | 26.1 | 58.8 | 52.2
Other expense, net | 2.8 | 4.6 | 6.0 | 5.9
Income before income taxes | 130.0 | 65.6 | 250.0 | 187.7
Operating Segments | CooperVision |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net sales | 635.9 | 589.3 | 1,257.4 | 1,170.6
Total operating income | 160.2 | 137.9 | 315.0 | 298.0
Operating Segments | CooperSurgical |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net sales | 306.7 | 288.1 | 616.8 | 565.3
Total operating income | 21.6 | (24.3) | 45.6 | (18.5)
Operating Segments | Toric and multifocal | CooperVision |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net sales | 310.3 | 280.4 | 607.6 | 542.0
Operating Segments | Sphere, other | CooperVision |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net sales | 325.6 | 308.9 | 649.8 | 628.6
Operating Segments | Office and surgical | CooperSurgical |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net sales | 182.9 | 163.0 | 374.0 | 328.2
Operating Segments | Fertility | CooperSurgical |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total net sales | 123.8 | 125.1 | 242.8 | 237.1
Corporate |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Total operating income | $ (20.1) | $ (17.3) | $ (45.8) | $ (33.7)

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