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Shareholders' Equity (Details) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended | 6 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jul. 09, 2021 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Feb. 28, 2021 | Feb. 23, 2021 | Dec. 31, 2020
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common dividends declared (USD per share) |  | $ 0.1700 | $ 0.0000 | $ 0.3200 | $ 0.3175 |  |  |
Common shares, par value (in USD per share) |  | $ 0.01 |  | $ 0.01 |  |  |  | $ 0.01
Aggregate value of shares authorized to be repurchased |  |  |  |  |  | $ 150 |  |
Number of shares repurchased (in shares) |  |  |  | 0 |  |  |  |
Private Placement |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Aggregate sales price of shares authorized to be sold under offering program |  |  |  |  |  |  | $ 150 |
Shares sold under under offing program (in shares) |  |  |  | 0 |  |  |  |
Common shares, par value (in USD per share) |  |  |  |  |  |  | $ 0.01 |
Subsequent Event |  |  |  |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |  |  |  |
Common dividends declared (USD per share) | $ 0.18 |  |  |  |  |  |  |

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