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Warranty (Tables)
3 Months Ended
Oct. 31, 2020
Standard Product Warranty Disclosure [Abstract]  
Reconciliation of warranty reserves The reconciliation of warranty reserves is as follows (in millions):
 Three Months Ended
October 31,
 20202019
Balance at beginning of period$9.5 $11.2 
Accruals for warranties issued during the reporting period0.1 0.4 
Accruals related to pre-existing warranties (including changes in estimates)(0.4)(0.3)
Less: settlements made during the period(0.8)(1.0)
Balance at end of period$8.4 $10.3