{"cik":57183,"taxonomy":"us-gaap","tag":"ContractWithCustomerLiabilityCurrent","label":"Contract with Customer, Liability, Current","description":"Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current.","entityName":"Spire Missouri Inc.","units":{"USD":[{"end":"2021-12-31","val":31300000,"accn":"0001437749-23-011050","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-04-26","frame":"CY2021Q4I"},{"end":"2022-09-30","val":18700000,"accn":"0001437749-23-011050","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-04-26","frame":"CY2022Q3I"},{"end":"2022-12-31","val":16900000,"accn":"0001437749-23-011050","fy":2023,"fp":"Q1","form":"10-Q","filed":"2023-04-26","frame":"CY2022Q4I"}]}}