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Changes in Stockholders' Equity (Narrative) (Details) - USD ($) $ in Millions | 1 Months Ended | 2 Months Ended |
--- | --- | --- | ---
Nov. 30, 2021 | Sep. 30, 2021 | Aug. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock repurchase program, outstanding balance authorized to be repurchased |  | $ 170.0 |
Accelerated share repurchases, settlement (payment) or receipt |  |  | $ 75.0
Stock repurchased and retired during period (in shares) |  | 558,471 |
Subsequent Event |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Accelerated share repurchases, settlement (payment) or receipt | $ 60.0 |  |
Stock repurchased and retired during period (in shares) | 393,733 |  |

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