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Retirement Benefits (Schedule of Net Periodic Benefit Costs) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Pension Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 596 $ 500 $ 1,746 $ 1,509
Interest cost 2,484 2,698 7,366 8,093
Expected return on plan assets (3,387) (2,867) (10,101) (8,603)
Amortization of: Net actuarial loss (gain) (63) (111) (176) (337)
Amortization of: Prior service cost 197 180 589 540
Net periodic retirement pension (benefit) cost (173) 400 (576) 1,202
Contributions paid 281 315 1,155 1,654
Other Postretirement Benefit Plans [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Interest cost 179 226 538 677
Amortization of: Net actuarial loss (gain) (110) (139) (331) (417)
Net periodic retirement pension (benefit) cost 69 87 207 260
Contributions paid - other postretirement plans 398 409 1,192 1,234
United States [Member] | Pension Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 229 193 688 581
Interest cost 1,719 1,899 5,156 5,698
Expected return on plan assets (2,748) (2,271) (8,244) (6,813)
Amortization of: Net actuarial loss (gain) 43 57 128 170
Amortization of: Prior service cost 191 174 572 523
Net periodic retirement pension (benefit) cost (566) 52 (1,700) 159
Other Countries [Member] | Pension Plan [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 367 307 1,058 928
Interest cost 765 799 2,210 2,395
Expected return on plan assets (639) (596) (1,857) (1,790)
Amortization of: Net actuarial loss (gain) (106) (168) (304) (507)
Amortization of: Prior service cost 6 6 17 17
Net periodic retirement pension (benefit) cost 393 348 1,124 1,043
Contributions paid $ 281 $ 315 $ 1,155 $ 1,654