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Shareholders' Equity (Narrative) (Details) - USD ($) $ in Millions | May 06, 2024 | Mar. 31, 2024 | Oct. 28, 2021
--- | --- | --- | ---
Subsequent Event [Member] |  |  |
Class of Stock [Line Items] |  |  |
Stock repurchase program, remaining authorization | $ 204.7 |  |
Class A Common Stock [Member] |  |  |
Class of Stock [Line Items] |  |  |
Securities issued |  | 0 |
New Plan [Member] | Class A Common Stock [Member] |  |  |
Class of Stock [Line Items] |  |  |
Stock repurchase program, authorized |  |  | $ 1,000.0

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