Supplemental Operations and Cash Flow Information (Tables)

12 Months Ended

Sep. 30, 2020

Supplemental Cash Flow Elements [Abstract]

Supplemental Operations Statement and Cash Flow Information

	Year Ended September 30,
	2020		2019		2018
Advertising and promotion expenses (a)	$	33.0	$	19.9	$	33.2
Repair and maintenance expenses	0.6		0.4		0.3
Research and development expenses	9.4		7.6		8.1
Interest paid (b)	48.8		—		—
Income taxes paid (c)	10.1		0.3		1.0