Commitments and Contingent Liabilities (Tables)

12 Months Ended

Sep. 30, 2016

Commitments and Contingencies Disclosure [Abstract]

Schedule of Loss Contingencies by Contingency

Obligations and expected recoveries related to environmental remediation costs, conditional asset retirement obligations and other recorded indemnification matters as of September 30, 2016 and 2015 are as follows:

	2016			2015
Environmental remediation costs	$	73.9		$	61.4
Conditional asset retirement obligations	20.6			20.2
Indemnification liabilities	17.0			32.6
Total recorded liabilities	111.5			114.2
Recorded probable expected recoveries	(22.5		)	(33.2		)
Net recorded liabilities	$	89.0		$	81.0

Environmental Remediation Cost Liabilities and Related Expected Recoveries

Environmental remediation cost liabilities and related expected recoveries at September 30, 2016 are as follows (in millions):

	2016
Other current liabilities	$	14.6
Other liabilities	59.3
Total recorded environmental remediation costs(1)	73.9
Receivables	(1.8		)
Other assets	(9.6		)
Total recorded probable expected recoveries	(11.4		)
Net environmental remediation costs	$	62.5

(1) Includes $51.6 million related to discounted ongoing operating and maintenance expenditures.

Schedule of Asset Retirement Obligations

Conditional asset retirement obligations and related expected recoveries at September 30, 2016 and 2015 are as follows (in millions):

	2016			2015
Other current liabilities	$	0.7		$	0.4
Other liabilities	19.9			19.8
Total recorded conditional asset retirement obligations	20.6			20.2
Receivables	(0.1		)	—
Other assets	(0.2		)	(0.3		)
Total recorded probable expected recoveries	(0.3		)	(0.3		)
Net conditional asset retirement obligations	$	20.3		$	19.9

Indemnification Liabilities and Expected Recoveries

Indemnification liabilities and related expected recoveries at September 30, 2016 and 2015 are as follows (in millions):

	2016			2015
Other current liabilities	$	4.9		$	3.2
Other liabilities	12.1			29.4
Total recorded indemnification liabilities	17.0			32.6
Receivables	(3.5		)	(2.1		)
Other assets	(7.3		)	(22.6		)
Total recorded probable expected recoveries	(10.8		)	(24.7		)
Net indemnification liabilities	$	6.2		$	7.9

Leases of Lessee Disclosure

As of September 30, 2016, minimum future rental commitments under operating leases having noncancelable lease terms in excess of one year are payable as follows (in millions):

2017	$	76.2
2018	65.2
2019	52.8
2020	45.5
2021	33.7
Beyond 2021	62.5
Total	$	335.9