Earnings Per Share

6 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Earnings Per Share

3. EARNINGS PER SHARE

	Three Months Ended March 31,				Six Months Ended March 31,
	2019		2018		2019		2018
Basic Earnings Per Share:
Net Income	$	154.6	$	98.2	$	221.9	$	214.2
Less: Income allocated to participating securities		0.3		0.2		0.5		0.5
Income Available to Common Shareholders	$	154.3	$	98.0	$	221.4	$	213.7
Weighted Average Shares Outstanding (in millions)		50.6		48.2		50.6		48.2
Basic Earnings Per Share	$	3.05	$	2.03	$	4.37	$	4.43
Diluted Earnings Per Share:
Net Income	$	154.6	$	98.2	$	221.9	$	214.2
Less: Income allocated to participating securities		0.3		0.2		0.5		0.5
Income Available to Common Shareholders	$	154.3	$	98.0	$	221.4	$	213.7
Weighted Average Shares Outstanding (in millions)		50.6		48.2		50.6		48.2
Dilutive Effect of Restricted Stock and Restricted Stock Units (in millions)*		0.2		0.2		0.2		0.2
Weighted Average Diluted Shares (in millions)		50.8		48.4		50.8		48.4
Diluted Earnings Per Share	$	3.04	$	2.03	$	4.36	$	4.42
* Calculation excludes certain outstanding 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		0.3		0.4		0.3		0.4