Segments - Restructuring and Related Costs (Details) - Corporate - USD ($) $ in Millions |
3 Months Ended | |
|---|---|---|
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Segment Reporting, Asset Reconciling Item [Line Items] | ||
| Total Restructuring and related costs | $ 30.9 | $ 20.3 |
| Cost of Sales | ||
| Segment Reporting, Asset Reconciling Item [Line Items] | ||
| Total Restructuring and related costs | 9.2 | 9.4 |
| Cost of Sales | US Operating Efficiency Project | ||
| Segment Reporting, Asset Reconciling Item [Line Items] | ||
| Total Restructuring and related costs | 6.1 | 0.0 |
| Selling, general and administrate expense (SG&A) | ||
| Segment Reporting, Asset Reconciling Item [Line Items] | ||
| Total Restructuring and related costs | 15.6 | 4.8 |
| Selling, general and administrate expense (SG&A) | IT enablement | ||
| Segment Reporting, Asset Reconciling Item [Line Items] | ||
| Total Restructuring and related costs | $ 0.0 | $ 6.1 |