Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions		3 Months Ended
	Dec. 09, 2024	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024	Jan. 26, 2023
Equity, Class of Treasury Stock [Line Items]
Treasury stock, shares		6,800,000		6,700,000
Treasury stock, Cost basis		$ 277.2		$ 264.1
Shares repurchased		350,000
2018 Stock Buyback Program [Member]
Equity, Class of Treasury Stock [Line Items]
Number of shares authorized for repurchase	4,300,000				4,300,000
Stock repurchase expiration date	Dec. 31, 2026
Shares repurchased		350,000	0
2018 Stock Buyback Program [Member] | Common Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Shares purchased average cost per share		$ 59.28
Restricted Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Number of shares nonvested		100,000		100,000