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Earnings Per Common Share - Narrative (Details) - shares
shares in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Sep. 30, 2024
Sep. 30, 2023
Earnings Per Share [Abstract]        
Antidilutive shares not included in Diluted EPS attributable to IDEX (in shares) 0.5 0.2 0.5 0.2