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Shareholders' Equity and Other Comprehensive Income (Loss) (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2021 | Jan. 26, 2021
Class of Stock [Line Items] |  |  |
Authorized amount |  |  | $ 200.0
Common Stock |  |  |
Class of Stock [Line Items] |  |  |
Share repurchased | $ 74.6 | $ 167.1 |
Shares repurchased (in shares) | 1.8 | 3.7 |
Average price of shares repurchased (in dollars per share) | $ 42.00 | $ 44.88 |

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