Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023	Jun. 20, 2023
Class of Stock [Line Items]
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation		$ (0.4)	$ (1.1)	$ (1.9)
Stock Issued During Period, Shares, New Issues	275,202		0		451,830	722,568
Stock Issued During Period, Value, Gross	$ 12.5		$ 0.0		$ 19.9	$ 24.4
Stock Issued During Period, Value, Net	12.2		0.0		19.3	23.4
Direct Costs of Stock Issuance	$ 0.1		0.0		$ 0.1	$ 0.2
Preferred Stock, Par Value Per Share	$ 1.00				$ 1.00		$ 1.00
Minimum [Member]
Class of Stock [Line Items]
Purchase Price Increase Per Share							18.00
Maximum [Member]
Class of Stock [Line Items]
Purchase Price Increase Per Share							$ 160.38
Preferred Stock [Member]
Class of Stock [Line Items]
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	$ 0.0		0.0	0.0
Common Stock [Member] \| Common Class A [Member]
Class of Stock [Line Items]
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	0.0		0.0	0.0
Excess of Capital over Par Value [Member]
Class of Stock [Line Items]
Share-based Payment Arrangement, Decrease for Tax Withholding Obligation	$ (0.4)		$ (1.1)	$ (1.9)	$ (0.1)