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.

+ Details

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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/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 55
-Paragraph 17
-URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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- Definition

Percentage of actual 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/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920

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Employee Benefit Plans - Schedule of Weighted-Average Asset Allocations (Details)	Sep. 30, 2018	Sep. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocation (as a percent)	100.00%	100.00%
Equity securities
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocation (as a percent)	23.00%	20.00%
Debt securities
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocation (as a percent)	76.00%	78.00%
Other
Defined Benefit Plan Disclosure [Line Items]
Weighted average asset allocation (as a percent)	1.00%	2.00%
Minimum \| Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target asset allocations	15.00%
Minimum \| Debt securities
Defined Benefit Plan Disclosure [Line Items]
Target asset allocations	65.00%
Minimum \| Other
Defined Benefit Plan Disclosure [Line Items]
Target asset allocations	0.00%
Maximum \| Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target asset allocations	25.00%
Maximum \| Debt securities
Defined Benefit Plan Disclosure [Line Items]
Target asset allocations	85.00%
Maximum \| Other
Defined Benefit Plan Disclosure [Line Items]
Target asset allocations	20.00%