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Earnings Per Share - Reconciliation of Kimco OPs Earnings and Weighted-average Number of Shares Used in Calculation of Basic and Diluted Earnings Per Share (Parenthetical) (Details)
shares in Millions
12 Months Ended
Dec. 31, 2022
shares
Stock Options  
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]  
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) 0.3