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.

No definition available.

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- Definition

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(5)(i)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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- Definition

Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

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Retirement Benefits (Plan Assets Target Allocation) (Details) - Defined Benefit Pension Plan	Sep. 30, 2017	Sep. 30, 2016
U.S.
Defined Benefit Plan Disclosure [Line Items]
Actual allocation, percentage	100.00%	100.00%
U.S. \| Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Actual allocation, percentage	58.00%	65.00%
U.S. \| Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Actual allocation, percentage	34.00%	28.00%
U.S. \| Real Estate/Other
Defined Benefit Plan Disclosure [Line Items]
Actual allocation, percentage	7.00%	7.00%
U.S. \| Cash
Defined Benefit Plan Disclosure [Line Items]
Actual allocation, percentage	1.00%	0.00%
U.S. \| Minimum \| Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation, percentage	46.00%
U.S. \| Minimum \| Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation, percentage	32.00%
U.S. \| Minimum \| Real Estate/Other
Defined Benefit Plan Disclosure [Line Items]
Target allocation, percentage	0.00%
U.S. \| Minimum \| Cash
Defined Benefit Plan Disclosure [Line Items]
Target allocation, percentage	0.00%
U.S. \| Maximum \| Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation, percentage	66.00%
U.S. \| Maximum \| Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation, percentage	42.00%
U.S. \| Maximum \| Real Estate/Other
Defined Benefit Plan Disclosure [Line Items]
Target allocation, percentage	10.00%
U.S. \| Maximum \| Cash
Defined Benefit Plan Disclosure [Line Items]
Target allocation, percentage	0.00%
International
Defined Benefit Plan Disclosure [Line Items]
Actual allocation, percentage	100.00%	100.00%
International \| Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Actual allocation, percentage	53.00%	60.00%
International \| Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Actual allocation, percentage	46.00%	38.00%
International \| Real Estate/Other
Defined Benefit Plan Disclosure [Line Items]
Actual allocation, percentage	1.00%	1.00%
International \| Cash
Defined Benefit Plan Disclosure [Line Items]
Actual allocation, percentage	0.00%	1.00%
International \| Minimum \| Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation, percentage	46.00%
International \| Minimum \| Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation, percentage	41.00%
International \| Minimum \| Real Estate/Other
Defined Benefit Plan Disclosure [Line Items]
Target allocation, percentage	0.00%
International \| Minimum \| Cash
Defined Benefit Plan Disclosure [Line Items]
Target allocation, percentage	0.00%
International \| Maximum \| Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation, percentage	57.00%
International \| Maximum \| Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation, percentage	53.00%
International \| Maximum \| Real Estate/Other
Defined Benefit Plan Disclosure [Line Items]
Target allocation, percentage	2.00%
International \| Maximum \| Cash
Defined Benefit Plan Disclosure [Line Items]
Target allocation, percentage	0.00%