Major Accounting Policies (Tables)

12 Months Ended

Sep. 30, 2020

Accounting Policies [Abstract]

Schedule of Changes in Carrying Amount of Allowance for Doubtful Accounts

Changes to the carrying amount of the allowance for doubtful accounts are summarized below:

Balance at 30 September 2017	$22.6
Provision for credit losses	11.2
Write-offs charged against the allowance	(7.2)
Currency translation and other	(0.2)
Balance at 30 September 2018	$26.4
Provision for credit losses	7.7
Write-offs charged against the allowance	(6.8)
Currency translation and other	(2.5)
Balance at 30 September 2019	$24.8
Provision for credit losses	7.7
Write-offs charged against the allowance	(8.3)
Currency translation and other	(0.3)
Balance at 30 September 2020	$23.9