Stock Based Compensation (Tables)

6 Months Ended

Jun. 30, 2025

Share-Based Payment Arrangement [Abstract]

Schedule of Components of Stock-Based Compensation and Expected Tax Benefit

The following table sets forth the components of our stock-based compensation and expected tax benefit for the three and six months ended June 30, 2025 and 2024 related to the plans in effect during the respective period:

	Three months ended June 30,				Six months ended June 30,
Stock-based compensation expense:	2025		2024		2025		2024
Restricted stock and restricted stock units	$	15.1	$	16.4	$	29.1	$	32.5
Stock options (1)	0.7		1.8		1.4		3.6
Total compensation expense	$	15.8	$	18.2	$	30.5	$	36.1
Expected tax benefit:
Restricted stock and restricted stock units	$	1.6	$	1.7	$	3.1	$	3.3
Stock options	0.1		0.1		0.1		0.2
Total expected tax benefit	$	1.7	$	1.8	$	3.2	$	3.5

(1)Lower expense for stock options was primarily due to the impact of the accelerated attribution method used to recognize expense for the performance-based stock option grants.

Schedule of Stock Options, Restricted Stock and Restricted Stock Units Activity

The following table summarizes the restricted stock and restricted stock units activity for the six months ended June 30, 2025:

	Restricted stock and Restricted stock units
	Number of shares	Weighted-average grant date fair value	Weighted-average remaining contractual term (in years)	Aggregate intrinsic value
Balances, January 1, 2025	10,008,303	$11.57	0.9	$124.7
Granted	6,766,753	$8.40
Forfeited	(171,901)	$10.49
Vested	(4,206,369)	$11.97
Balances, June 30, 2025	12,396,786	$9.72	1.3	$112.7