EARNINGS PER COMMON SHARE (Tables)

6 Months Ended

Mar. 31, 2017

Earnings Per Share [Abstract]

Earnings Per Common Share

	Three Months Ended March 31,				Six Months Ended March 31,
	2017		2016		2017		2016
Basic EPS:
Net Income	$	108.0	$	100.8	$	153.2	$	147.7
Less: Income allocated to participating securities	0.2		0.3		0.4		0.5
Net Income Available to Common Shareholders	$	107.8	$	100.5	$	152.8	$	147.2
Weighted Average Shares Outstanding (in millions)	45.6		43.3		45.6		43.3
Basic Earnings Per Share of Common Stock	$	2.36	$	2.32	$	3.35	$	3.40
Diluted EPS:
Net Income	$	108.0	$	100.8	$	153.2	$	147.7
Less: Income allocated to participating securities	0.2		0.3		0.4		0.5
Net Income Available to Common Shareholders	$	107.8	$	100.5	$	152.8	$	147.2
Weighted Average Shares Outstanding (in millions)	45.6		43.3		45.6		43.3
Dilutive Effect of Restricted Stock, Restricted Stock Units, and Stock Options (in millions)*	0.1		0.2		0.1		0.2
Weighted Average Diluted Shares (in millions)	45.7		43.5		45.7		43.5
Diluted Earnings Per Share of Common Stock	$	2.36	$	2.31	$	3.34	$	3.39
* 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	0.5		0.4		0.5		0.4