Commitments and Contingent Liabilities (Tables)

12 Months Ended

Sep. 30, 2018

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 are as follows:

	2018			2017
Environmental remediation costs	$	61.6		$	67.6
Conditional asset retirement obligations	21.9			21.2
Indemnification liabilities	9.5			12.0
Total recorded liabilities	93.0			100.8
Recorded probable expected recoveries	(14.1		)	(17.8		)
Net recorded liabilities	$	78.9		$	83.0

Environmental Remediation Cost Liabilities and Related Expected Recoveries

Environmental remediation cost liabilities and related expected recoveries are as follows (in millions):

	2018
Other current liabilities	$	7.8
Other liabilities	53.8
Total recorded environmental remediation costs(1)	61.6
Receivables	(1.4		)
Other assets	(8.0		)
Total recorded probable expected recoveries	(9.4		)
Net environmental remediation costs	$	52.2

⁽¹⁾ Includes $45.7 million related to discounted ongoing operating and maintenance expenditures.

Schedule of Asset Retirement Obligations

Conditional asset retirement obligations and related expected recoveries are as follows (in millions):

	2018			2017
Other current liabilities	$	0.6		$	0.7
Other liabilities	21.3			20.5
Total recorded conditional asset retirement obligations	21.9			21.2
Receivables	—			(0.1		)
Other assets	(0.3		)	(0.2		)
Total recorded probable expected recoveries	(0.3		)	(0.3		)
Net conditional asset retirement obligations	$	21.6		$	20.9

Indemnification Liabilities and Expected Recoveries

Indemnification liabilities and related expected recoveries are as follows (in millions):

	2018			2017
Other current liabilities	$	1.6		$	2.5
Other liabilities	7.9			9.5
Total recorded indemnification liabilities	9.5			12.0
Receivables	(0.8		)	(1.6		)
Other assets	(3.6		)	(4.6		)
Total recorded probable expected recoveries	(4.4		)	(6.2		)
Net indemnification liabilities	$	5.1		$	5.8

Leases of Lessee Disclosure

As of September 30, 2018, minimum future rental commitments under operating leases having noncancelable lease terms in excess of one year are payable as follows (in millions):

2019	$	78.1
2020	68.9
2021	54.6
2022	40.9
2023	30.2
Beyond 2023	68.4
Total	$	341.1