Earnings Per Common Share (Tables)

9 Months Ended

Jun. 30, 2021

Earnings Per Share [Abstract]

Schedule of Basic and Diluted Earnings Per Share

	Three Months Ended June 30,					Nine Months Ended June 30,
	2021		2020			2021		2020
Basic Earnings Per Common Share:
Net Income (Loss)	$	5.3	$	(92.3	)	$	281.6	$	108.3
Less: Provision for preferred dividends		3.7		3.7			11.1		11.1
Income (loss) allocated to participating securities		0.1		(0.1	)		0.5		0.2
Income (Loss) Available to Common Shareholders	$	1.5	$	(95.9	)	$	270.0	$	97.0
Weighted Average Common Shares Outstanding (in millions)		51.6		51.2			51.6		51.1
Basic Earnings (Loss) Per Common Share	$	0.03	$	(1.87	)	$	5.24	$	1.90
Diluted Earnings Per Common Share:
Net Income (Loss)	$	5.3	$	(92.3	)	$	281.6	$	108.3
Less: Provision for preferred dividends		3.7		3.7			11.1		11.1
Income (loss) allocated to participating securities		0.1		(0.1	)		0.5		0.2
Income (Loss) Available to Common Shareholders	$	1.5	$	(95.9	)	$	270.0	$	97.0
Weighted Average Common Shares Outstanding (in millions)		51.6		51.2			51.6		51.1
Dilutive Effect of Restricted Stock and Restricted Stock Units (in millions)*		0.1		—			0.1		0.1
Weighted Average Diluted Common Shares (in millions)		51.7		51.2			51.7		51.2
Diluted Earnings (Loss) Per Common Share	$	0.03	$	(1.87	)	$	5.23	$	1.90
* 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		0.1			0.1		0.1