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Commitments and Contingencies (Tables)
6 Months Ended
Mar. 31, 2025
Commitments and Contingencies Disclosure [Abstract]  
Changes in warranty liability
Changes in the Company’s warranty liability during the three and six months ended March 31, 2025 and 2024 were as follows:

Three Months Ended
March 31,
Six Months Ended
March 31,
 2025202420252024
 (In millions)
Warranty liability, beginning of period$570.4 $531.8 $566.9 $512.4 
Warranties issued43.0 53.3 87.0 98.4 
Changes in liability for pre-existing warranties(27.0)(12.0)(38.0)(7.5)
Settlements made(29.1)(28.5)(58.6)(58.7)
Warranty liability, end of period$557.3 $544.6 $557.3 $544.6 
Changes in legal claims reserves
Changes in the Company’s legal claims reserves during the six months ended March 31, 2025 and 2024 were as follows:

Six Months Ended
March 31,
20252024
(In millions)
Reserves for legal claims, beginning of period$949.6 $858.9 
Increase in reserves 72.5 39.8 
Payments(30.8)(49.4)
Reserves for legal claims, end of period$991.3 $849.3