{"cik":3146,"taxonomy":"us-gaap","tag":"Goodwill","label":"Goodwill","description":"Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.","entityName":"Spire Inc.","units":{"USD":[{"end":"2025-06-30","val":1171600000,"accn":"0001193125-26-334335","fy":2026,"fp":"Q3","form":"10-Q","filed":"2026-08-05","frame":"CY2025Q2I"},{"end":"2025-09-30","val":1171600000,"accn":"0001193125-26-334335","fy":2026,"fp":"Q3","form":"10-Q","filed":"2026-08-05","frame":"CY2025Q3I"},{"end":"2026-06-30","val":1895200000,"accn":"0001193125-26-334335","fy":2026,"fp":"Q3","form":"10-Q","filed":"2026-08-05","frame":"CY2026Q2I"}]}}