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Retirement Benefit Plans - Summary of Benefits Expected to be Paid Out (Detail)
$ in Millions
Dec. 31, 2025
USD ($)
United States [Member]  
Schedule of Expected Future Pension Benefit Payment [Line Items]  
2026 $ 26.5
2027 27.0
2028 27.1
2029 28.5
2030 27.0
2031-2035 133.7
Foreign [Member]  
Schedule of Expected Future Pension Benefit Payment [Line Items]  
2026 43.5
2027 40.5
2028 40.6
2029 39.7
2030 39.3
2031-2035 $ 193.6