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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Cash restricted $ 78.4 $ 56.3
Common shares, par value per share (in dollars per share) $ 1 $ 1
Common shares, authorized shares (in shares) 50,000,000 50,000,000
Common shares, issued shares (in shares) 3,102,011 3,185,353
Common shares, outstanding shares (in shares) 3,102,011 3,185,353
NSM    
Cash restricted $ 78.4 $ 56.3