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Accumulated Other Comprehensive Loss
3 Months Ended
Dec. 31, 2022
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Comprehensive Income (Loss) Note [Text Block] Accumulated Other Comprehensive Income (Loss)
Accumulated other comprehensive income (loss) is as follows:

  Pension, net of tax Foreign currency translationTotal
(in millions)
Balance at September 30, 2022$(36.3)$(8.3)$(44.6)
Current period other comprehensive income0.6 4.0 4.6 
Balance at December 31, 2022$(35.7)$(4.3)$(40.0)
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Accumulated other comprehensive income (loss) is as follows:

  Pension, net of tax Foreign currency translationTotal
(in millions)
Balance at September 30, 2022$(36.3)$(8.3)$(44.6)
Current period other comprehensive income0.6 4.0 4.6 
Balance at December 31, 2022$(35.7)$(4.3)$(40.0)