EARNINGS PER COMMON SHARE (Tables)

6 Months Ended

Mar. 31, 2016

Earnings Per Share [Abstract]

Earnings Per Common Share

	Three Months Ended March 31,				Six Months Ended March 31,
	2016		2015		2016		2015
Basic EPS:
Net Income	$	100.8	$	94.4	$	147.7	$	141.5
Less: Income allocated to participating securities	0.3		0.3		0.5		0.5
Net Income Available to Common Shareholders	$	100.5	$	94.1	$	147.2	$	141.0
Weighted Average Shares Outstanding (in millions)	43.3		43.1		43.3		43.1
Basic Earnings Per Share of Common Stock	$	2.32	$	2.18	$	3.40	$	3.27
Diluted EPS:
Net Income	$	100.8	$	94.4	$	147.7	$	141.5
Less: Income allocated to participating securities	0.3		0.3		0.5		0.5
Net Income Available to Common Shareholders	$	100.5	$	94.1	$	147.2	$	141.0
Weighted Average Shares Outstanding (in millions)	43.3		43.1		43.3		43.1
Dilutive Effect of Stock Options, Restricted Stock and Restricted Stock Units (in millions)	0.2		0.1		0.2		0.1
Weighted Average Diluted Shares (in millions)	43.5		43.2		43.5		43.2
Diluted Earnings Per Share of Common Stock	$	2.31	$	2.18	$	3.39	$	3.26
Outstanding Shares (in millions) Excluded from     the Calculation of Diluted EPS Attributable to:
Restricted stock and stock units subject to     performance and/or market conditions	0.4		0.4		0.4		0.4