Earnings (Loss) per Share (Tables)

12 Months Ended

Sep. 30, 2016

Earnings (Loss) per Share [Abstract]

Schedule of Earnings (Loss) per Share

	2016		2015		2014
Earnings (loss) per share numerator:
Income (loss) from continuing operations attributable to common shareholders before allocation of earnings to participating securities	$	489.0	$	236.6	$	(22.0	)
Less: earnings allocated to participating securities	—		2.0		—
Income (loss) from continuing operations attributable to common shareholders, after earnings allocated to participating securities	489.0		234.6		(22.0		)
Income (loss) from discontinued operations	154.7		88.1		(297.3		)
Less: earnings from discontinued operations allocated to participating securities	—		0.7		—
Income (loss) from discontinued operations attributable to common shareholders, after allocation of earnings to participating securities	154.7		87.4		(297.3		)
Net income (loss) attributable to common shareholders, after allocation of earnings to participating securities	$	643.7	$	322.0	$	(319.3	)
Earnings (loss) per share denominator:
Weighted-average shares outstanding - basic	110.6		115.8		64.9
Impact of dilutive securities	0.9		1.4		—
Weighted-average shares outstanding - diluted	111.5		117.2		64.9
Basic earnings (loss) per share attributable to common shareholders
Income (loss) from continuing operations	$	4.42	$	2.03	$	(0.34	)
Income (loss) from discontinued operations	1.40		0.75		(4.58		)
Net income (loss) attributable to common shareholders	$	5.82	$	2.78	$	(4.92	)
Diluted earnings (loss) per share attributable to common shareholders
Income (loss) from continuing operations	$	4.39	$	2.00	$	(0.34	)
Income (loss) from discontinued operations	1.39		0.75		(4.58		)
Net income (loss) attributable to common shareholders	$	5.77	$	2.75	$	(4.92	)