XML 8 R1.htm IDEA: XBRL DOCUMENT v3.22.1
Document and Entity Information
May 09, 2022
Document Information [Line Items]  
Document Type 8-K
Document Period End Date May 09, 2022
Entity File Number 1-16681
Entity Registrant Name Spire Inc
Entity Address, Address Line One 700 Market Street
Entity Address, City or Town St. Louis
Entity Address, State or Province MO
Entity Address, Postal Zip Code 63101
City Area Code 314
Local Phone Number 342-0500
Entity Incorporation, State or Country Code MO
Entity Tax Identification Number 74-2976504
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Amendment Flag false
Entity Central Index Key 0001126956
Common Stock $1.00 par value [Member]  
Document Information [Line Items]  
Security12b Title Common Stock, par value $1.00 per share
Trading Symbol SR
Security Exchange Name NYSE
Depositary Shares, each representing a 1/1,000th interest in a share of 5.90% Series A Cumulative Redeemable Perpetual Preferred Stock, par value $25.00 per share [Member]  
Document Information [Line Items]  
Security12b Title Depositary Shares, each representing a 1/1000th interest in a share of 5.90% Series A Cumulative Redeemable Perpetual Preferred Stock
Trading Symbol SR.PRA
Security Exchange Name NYSE