Earnings per Share (Tables)

6 Months Ended

Mar. 31, 2020

Earnings Per Share [Abstract]

Reconciliation of Basic Average Common Shares Outstanding

A reconciliation of basic average common shares outstanding to diluted average common shares outstanding is as follows (in millions):

	Three Months Ended March 31,		Six Months Ended March 31,
	2020	2019	2020	2019
Basic average common shares outstanding	73.4	83.3	75.8	84.0
Impact of restricted shares, restricted share units and performance share units	1.1	1.5	1.3	1.9
Impact of convertible notes	0.8	0.8	0.9	0.7
Diluted average common shares outstanding	75.3	85.6	78.0	86.6