Earnings per Share

3 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Earnings per Share

Earnings per Share

Basic earnings (loss) per share is calculated using the weighted average number of shares outstanding during each period. The diluted earnings (loss) per share calculation includes the impact of dilutive common stock options, restricted shares, restricted share units, performance share unit awards and convertible securities, if applicable.

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

	Three Months Ended December 31,
	2019	2018
Basic average common shares outstanding	78.2	84.8
Impact of restricted shares, restricted share units and performance share units	1.6	2.1
Impact of convertible notes	0.9	0.6
Diluted average common shares outstanding	80.7	87.5