Commitments and Contingent Liabilities (Tables)

12 Months Ended

Sep. 30, 2017

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, 2017 and 2016 are as follows:

	2017			2016
Environmental remediation costs	$	67.6		$	73.9
Conditional asset retirement obligations	21.2			20.6
Indemnification liabilities	12.0			17.0
Total recorded liabilities	100.8			111.5
Recorded probable expected recoveries	(17.8		)	(22.5		)
Net recorded liabilities	$	83.0		$	89.0

Environmental Remediation Cost Liabilities and Related Expected Recoveries

Environmental remediation cost liabilities and related expected recoveries at September 30, 2017 are as follows (in millions):

	2017
Other current liabilities	$	10.7
Other liabilities	56.9
Total recorded environmental remediation costs(1)	67.6
Receivables	(1.2		)
Other assets	(10.1		)
Total recorded probable expected recoveries	(11.3		)
Net environmental remediation costs	$	56.3

(1) Includes $47.5 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, 2017 and 2016 are as follows (in millions):

	2017			2016
Other current liabilities	$	0.7		$	0.7
Other liabilities	20.5			19.9
Total recorded conditional asset retirement obligations	21.2			20.6
Receivables	(0.1		)	(0.1		)
Other assets	(0.2		)	(0.2		)
Total recorded probable expected recoveries	(0.3		)	(0.3		)
Net conditional asset retirement obligations	$	20.9		$	20.3

Indemnification Liabilities and Expected Recoveries

Indemnification liabilities and related expected recoveries at September 30, 2017 and 2016 are as follows (in millions):

	2017			2016
Other current liabilities	$	2.5		$	4.9
Other liabilities	9.5			12.1
Total recorded indemnification liabilities	12.0			17.0
Receivables	(1.6		)	(3.5		)
Other assets	(4.6		)	(7.3		)
Total recorded probable expected recoveries	(6.2		)	(10.8		)
Net indemnification liabilities	$	5.8		$	6.2

Leases of Lessee Disclosure

As of September 30, 2017, minimum future rental commitments under operating leases having noncancelable lease terms in excess of one year are payable as follows (in millions):

2018	$	73.3
2019	62.4
2020	52.1
2021	36.6
2022	25.8
Beyond 2022	34.8
Total	$	285.0