EARNINGS PER COMMON SHARE (Tables)

9 Months Ended

Jun. 30, 2017

Earnings Per Share [Abstract]

Earnings Per Common Share

	Three Months Ended June 30,				Nine Months Ended June 30,
	2017		2016		2017		2016
Basic EPS:
Net Income	$	21.7	$	10.7	$	174.9	$	158.4
Less: Income allocated to participating securities	0.1		—		0.4		0.5
Net Income Available to Common Shareholders	$	21.6	$	10.7	$	174.5	$	157.9
Weighted Average Shares Outstanding (in millions)	48.1		44.4		46.4		43.6
Basic Earnings Per Share of Common Stock	$	0.45	$	0.24	$	3.76	$	3.62
Diluted EPS:
Net Income	$	21.7	$	10.7	$	174.9	$	158.4
Less: Income allocated to participating securities	0.1		—		0.4		0.5
Net Income Available to Common Shareholders	$	21.6	$	10.7	$	174.5	$	157.9
Weighted Average Shares Outstanding (in millions)	48.1		44.4		46.4		43.6
Dilutive Effect of Restricted Stock, Restricted Stock Units, and Stock Options (in millions)*	0.1		0.2		0.2		0.2
Weighted Average Diluted Shares (in millions)	48.2		44.6		46.6		43.8
Diluted Earnings Per Share of Common Stock	$	0.45	$	0.24	$	3.75	$	3.60
* 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	0.4		0.5		0.4		0.5