Contingencies - Asbestos related reserves and recoveries (Details) - USD ($) $ in Millions	Mar. 31, 2017	Sep. 30, 2016
Loss Contingencies [Line Items]
Asbestos-related liabilities	$ 12	$ 13
Maremont Asbestos
Loss Contingencies [Line Items]
Pending and future claims	70	70
Billed but unpaid claims	3	2
Asbestos-related liabilities	73	72
Asbestos-related insurance recoveries	29	32
Rockwell Asbestos
Loss Contingencies [Line Items]
Pending and future claims	60	60
Billed but unpaid claims	6	1
Asbestos-related liabilities	66	61
Asbestos-related insurance recoveries	$ 27	$ 27

Accrual For Environmental Loss Contingencies, Billed But Unpaid Claims

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- Definition

Accrual For Environmental Loss Contingencies, Pending And Future Claims

+ References

No definition available.

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- Definition

Total costs accrued as of the balance sheet date for environmental loss contingencies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

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-Publisher FASB
-Name Accounting Standards Codification
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Carrying amount as of the balance sheet date of amounts expected to be recovered under the terms of insurance contracts.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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