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Pension Benefit Obligations - Narrative (Details)
$ in Millions
 6 Months Ended
Mar. 31, 2025
USD ($)
U.S.  
Defined Benefit Plan Disclosure [Line Items]  
Total amounts of employer contributions paid $ 4.8
Expected remaining scheduled annual employer contributions for the current fiscal year 6.4
Int’l  
Defined Benefit Plan Disclosure [Line Items]  
Total amounts of employer contributions paid 10.9
Expected remaining scheduled annual employer contributions for the current fiscal year $ 12.5