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Capital Stock Repurchase Plan Transactions (Narrative) (Details) - USD ($) $ in Millions | Mar. 31, 2021 | Mar. 31, 2020
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Capital Stock Repurchase Plan Transactions [Abstract] |  |
Stock repurchase program, amount authorized |  | $ 250.0
Stock repurchase program, remaining authorized repurchase amount | $ 133.7 |

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- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
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- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
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