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Organization Restructuring Rollforward (Tables)
6 Months Ended
Mar. 31, 2022
Restructuring Cost and Reserve [Line Items]  
Restructuring and Related Costs [Table Text Block] Activity in accrued restructuring, reported as part of Other current liabilities, is presented below.
Six months ended
March 31,
20222021
(in millions)
Beginning balance$3.1 $2.8 
Amounts accrued1.6 1.0 
Amounts paid(2.6)(1.6)
Ending balance$2.1 $2.2