{"cik":1059262,"taxonomy":"us-gaap","tag":"IncreaseDecreaseInAccountsReceivable","label":"Increase (Decrease) in Accounts Receivable","description":"The increase (decrease) during the reporting period in amount due within one year (or one business cycle) from customers for the credit sale of goods and services.","entityName":"SP Plus Corp","units":{"USD":[{"start":"2021-01-01","end":"2021-12-31","val":29200000,"accn":"0000950170-24-021554","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-28","frame":"CY2021"},{"start":"2022-01-01","end":"2022-06-30","val":-13400000,"accn":"0000950170-23-037984","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2022-01-01","end":"2022-09-30","val":13600000,"accn":"0000950170-23-058158","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2022-01-01","end":"2022-12-31","val":27900000,"accn":"0000950170-24-021554","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-28","frame":"CY2022"},{"start":"2023-01-01","end":"2023-03-31","val":-8600000,"accn":"0000950170-24-052091","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2023Q1"},{"start":"2023-01-01","end":"2023-06-30","val":-11900000,"accn":"0000950170-23-037984","fy":2023,"fp":"Q2","form":"10-Q","filed":"2023-08-03"},{"start":"2023-01-01","end":"2023-09-30","val":17900000,"accn":"0000950170-23-058158","fy":2023,"fp":"Q3","form":"10-Q","filed":"2023-11-02"},{"start":"2023-01-01","end":"2023-12-31","val":14600000,"accn":"0000950170-24-021554","fy":2023,"fp":"FY","form":"10-K","filed":"2024-02-28","frame":"CY2023"},{"start":"2024-01-01","end":"2024-03-31","val":-700000,"accn":"0000950170-24-052091","fy":2024,"fp":"Q1","form":"10-Q","filed":"2024-05-02","frame":"CY2024Q1"}]}}