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Common Shareholders’ Equity and Non-controlling Interests (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Common Shares Repurchased and Retired |  |  |
Value of common shares repurchased and retired | $ 107.5 | $ 85.1 | $ 4.9
Value of each common share repurchased and retired (in usd per share) | $ 1,091 | $ 859 | $ 858
Common Shares Issued |  |  |
Stock issued (in shares) | 15,066 | 15,745 | 17,917
Dividends on Common Shares |  |  |
Cash dividends declared and paid | $ 3.1 | $ 3.2 | $ 3.2
Dividends declared and paid (in usd per share) | $ 1.00 |  |
Non-controlling Equity | $ 156.6 | $ (88.1) |
HG Global |  |  |
Dividends on Common Shares |  |  |
Non-controlling Percentage | 3.10% | 3.10% |
Ark |  |  |
Dividends on Common Shares |  |  |
Non-controlling Percentage | 28.00% | 0.00% |
NSM |  |  |
Dividends on Common Shares |  |  |
Non-controlling Percentage | 3.50% | 3.40% |
Kudu |  |  |
Dividends on Common Shares |  |  |
Non-controlling Percentage | 2.50% | 0.70% |
BAM |  |  |
Dividends on Common Shares |  |  |
Non-controlling Percentage | 100.00% | 100.00% |
Common equity securities |  |  |
Common Shares Repurchased and Retired |  |  |
Common shares repurchased and retired (in shares) | 98,511 | 99,087 | 5,679
Restricted Stock |  |  |
Common Shares Issued |  |  |
Stock issued (in shares) | 13,475 | 14,055 | 15,600
General Board Authorization |  |  |
Common Shares Repurchased and Retired |  |  |
Additional authorized repurchase of common shares (in shares) | 451,224 |  |
Common shares repurchased and retired (in shares) | 91,293 |  |
Value of common shares repurchased and retired | $ 100.0 |  |
Value of each common share repurchased and retired (in usd per share) | $ 1,095 |  |
Directors | Restricted Stock |  |  |
Common Shares Issued |  |  |
Shares issued to directors (in shares) | 1,591 | 1,440 | 2,317
Repurchased for Employee Benefit Plans |  |  |
Common Shares Repurchased and Retired |  |  |
Common shares repurchased and retired (in shares) | 7,218 |  |
MediaAlpha | Restricted Stock |  |  |
Common Shares Issued |  |  |
Stock issued (in shares) |  | 250 |
HG Global |  |  |
Dividends on Common Shares |  |  |
Non-controlling Equity | $ 8.9 | $ 13.5 |
Ark |  |  |
Dividends on Common Shares |  |  |
Non-controlling Equity | 230.7 | 0.0 |
NSM |  |  |
Dividends on Common Shares |  |  |
Non-controlling Equity | 16.7 | 17.0 |
Kudu |  |  |
Dividends on Common Shares |  |  |
Non-controlling Equity | 12.4 | 2.3 |
Other |  |  |
Dividends on Common Shares |  |  |
Non-controlling Equity | 11.9 | 2.4 |
BAM |  |  |
Dividends on Common Shares |  |  |
Non-controlling Equity | (124.0) | (123.3) |
Total Non-Controlling Excluding Reciprocals |  |  |
Dividends on Common Shares |  |  |
Non-controlling Equity | $ 280.6 | $ 35.2 |

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