Stockholders' Equity (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	May 04, 2022	Nov. 06, 2018
Class of Stock [Line Items]
Common stock shares authorized	100,000,000.0		100,000,000.0		100,000,000
Common stock, par value	$ 0.01		$ 0.01		$ 0.01
Preferred stock shares authorized	50,000,000.0		50,000,000.0		50,000,000
Preferred stock, par value	$ 0.01		$ 0.01		$ 0.01
Common stock shares issued	31,337,062		31,337,062		31,774,615
Common stock shares outstanding	31,337,062		31,337,062		31,774,615
Preferred stock shares outstanding	0		0		0
Shares amount to be repurchased							9,000,000.0
Shares available to be purchased	5,100,000		5,100,000
Weighted average price of repurchased shares		$ 69.61	$ 81.49	$ 69.09
Cost netted and surrendered as payment for minimum statutory withholding obligations in connection with vested awards			$ 10.5	$ 10.7
Common stock repurchased	0	247,800,000	651,900	278,200,000
Common stock repurchased, amount		$ 17.3	$ 53.1	$ 19.2
Omnibus 2022 Incentive Plan [Member]
Class of Stock [Line Items]
Vesting of stock-based compensation awards, shares			300,000	400,000
Common stock shares for stock award issuance	2,200,000		2,200,000			3,100,000
2017 Incentive Plan [Member]
Class of Stock [Line Items]
Common stock shares for stock award issuance						51,200