Earnings Per Share Available to Common Stockholders (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Earnings Per Share [Abstract]
Net income available to common stockholders	$ 124.6	$ 102.9
Basic weighted average shares outstanding (in shares)	186,000,000.0	184,800,000
Weighted-average effect of stock-based compensation awards (in shares)	1,500,000	1,600,000
Diluted weighted average shares outstanding (in shares)	187,500,000	186,400,000
Earnings per share available to common stockholders:
Basic (usd per share)	$ 0.67	$ 0.56
Diluted (usd per share)	$ 0.66	$ 0.55