Earnings Per Common Share (Tables)

12 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Schedule of Basic and Diluted Earnings Per Share

	2019		2018		2017
Basic Earnings Per Common Share:
Net Income	$	184.6	$	214.2	$	161.6
Less:   Provision for preferred dividends		5.3		—		—
Income allocated to participating securities		0.4		0.5		0.4
Net Income Available to Common Shareholders	$	178.9	$	213.7	$	161.2
Weighted Average Common Shares Outstanding (in millions)		50.7		49.1		46.9
Basic Earnings Per Share of Common Stock	$	3.53	$	4.35	$	3.44
Diluted Earnings per Share:
Net Income	$	184.6	$	214.2	$	161.6
Less:   Provision for preferred dividends		5.3		—		—
Income allocated to participating securities		0.4		0.5		0.4
Net Income Available to Common Shareholders	$	178.9	$	213.7	$	161.2
Weighted Average Common Shares Outstanding (in millions)		50.7		49.1		46.9
Dilutive Effect of Restricted Stock and Restricted Stock Units (in millions)*		0.1		0.2		0.1
Weighted Average Diluted Common Shares (in millions)		50.8		49.3		47.0
Diluted Earnings Per Share of Common Stock	$	3.52	$	4.33	$	3.43
* Calculation excludes certain outstanding common shares (shown in millions by     period at the right) attributable to stock units subject to performance or market     conditions and restricted stock, which could have a dilutive effect in the future		0.1		0.4		0.5