The number of former manufactured gas plant (MGP) sites in Missouri posing potential environmental liability.

No definition available.

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- Definition

Number Of Incident Fatalities

+ References

No definition available.

+ Details

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- Definition

Site Contingency, Number of Former Manufactured Gas Distribution

+ References

No definition available.

+ Details

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- Definition

Site Contingency, Number of Former Manufactured Gas Plant

+ References

No definition available.

+ Details

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- Definition

Sites enrolled in Brownfields/Voluntary clean up program.

+ References

No definition available.

+ Details

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- Definition

The total number of new claims filed pertaining to a loss contingency during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82911808&loc=d3e14435-108349

+ Details

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- Definition

Number of plaintiffs that have filed claims pertaining to a loss contingency.

+ References

No definition available.

+ Details

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- Definition

Number of pending claims pertaining to a loss contingency.

+ References

+ Details

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- Definition

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.

+ References

No definition available.

+ Details

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Commitments and Contingencies - Additional Information - Contingencies (Details)		6 Months Ended
	Dec. 17, 2013 fatality	Mar. 31, 2019 site lawsuit plaintiff	Sep. 30, 2013 site
Site Contingency [Line Items]
Number of lawsuits \| lawsuit		14
Number of plaintiffs \| plaintiff		1,600
Pending Litigation
Site Contingency [Line Items]
Number of lawsuits pending \| plaintiff		13
Spire Missouri East
Site Contingency [Line Items]
Number of former manufactured gas plant (MGP) sites in Missouri		3
Number of sites enrolled in Brownfields/Voluntary clean up program		2
Spire Missouri East \| Previous Ownership
Site Contingency [Line Items]
Number of former manufactured gas plant (MGP)			19
Spire Missouri West \| Previous Ownership
Site Contingency [Line Items]
Number of former manufactured gas plant (MGP)		7
Spire Alabama
Site Contingency [Line Items]
Number of former manufactured gas plant (MGP)		9
Number of former manufactured gas distribution		5
Number of incident fatalities \| fatality	1
Spire Alabama \| Current Ownership
Site Contingency [Line Items]
Number of former manufactured gas plant (MGP)		4
Number of former manufactured gas distribution		1