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Shareholders' Equity (Shares Repurchased Under Stock Repurchase Program) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 1 Months Ended | 3 Months Ended
--- | --- | ---
Apr. 23, 2025 | Mar. 31, 2025 | Mar. 31, 2024
Class of Stock [Line Items] |  |  |  |
Aggregate purchase price |  |  | $ 226.6 | $ 38.8
Excise tax accrual on share repurchases |  |  | $ 1.8 | $ 0.1
Stock Repurchase Program Board Authorized Repurchases |  |  |  |
Class of Stock [Line Items] |  |  |  |
Shares repurchased (in shares) |  |  | 1.4 | 0.2
Aggregate purchase price | [1] |  | $ 224.8 | $ 38.7
Average purchase price per share (in dollars per share) |  |  | $ 164.95 | $ 158.40
Remaining amount available for share repurchase |  |  | $ 636.0 |
Stock Repurchase Program Board Authorized Repurchases | Subsequent Event |  |  |  |
Class of Stock [Line Items] |  |  |  |
Shares repurchased (in shares) |  | 0.2 |  |
Aggregate purchase price |  | $ 28.9 |  |
Average purchase price per share (in dollars per share) |  | $ 157.57 |  |
[1] | (1) Excludes the excise tax imposed under the Inflation Reduction Act of $1.8 million and $0.1 million for the three months ended March 31, 2025, and March 31, 2024, respectively.

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