CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
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)	2,994,162	3,017,772
Common shares, outstanding shares (in shares)	2,994,162	3,017,772
Specialty Insurance Distribution (NSM)
Restricted cash	$ 90.2	$ 89.2
Asset Management (Kudu)
Restricted cash	$ 4.5	$ 4.5