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Equity Incentive Program (Tables)

6 Months Ended

Jun. 30, 2024

Share-Based Payment Arrangement, Noncash Expense [Abstract]

Schedule of Share-Based Compensation, Employee Stock Purchase Plan, Activity

The following table summarizes the stock-based compensation expense recognized by the Company for the periods presented:

			Three Months Ended June 30,												Six Months Ended June 30,
(in millions)			2024						2023						2024						2023
Total pre-tax stock-based compensation expense			$	7.4					$	7.1					$	14.1					$	14.9
Tax benefit			0.3						0.3						3.0						3.2
Total stock-based compensation expense, net of tax			$	7.1					$	6.8					$	11.1					$	11.7

Schedule of Black-Scholes Option-Pricing Assumptions

No stock options were granted during the six months ended June 30, 2024 and 2023.

Schedule of SSAR and Stock Options Activity

The following table summarizes the Company's stock option activity for the six months ended June 30, 2024:

																											Number of Shares						Weighted-Average Exercise Price						Aggregate Intrinsic Value						Weighted-Average Remaining Contractual Term (Years)
(in millions, except share and per share amounts)
Outstanding at December 31, 2023																											2,104,356						$	17.15
Exercised																											(10,325)						15.10
Expired																											(331,709)						19.27
Outstanding at June 30, 2024																											1,762,322						$	16.77					$	2.1					2.1
Exercisable at June 30, 2024																											1,705,929						$	16.62					$	2.1					2.0

Schedule of Restricted Stock Units Award Activity

The following table summarizes the Company's restricted stock unit ("RSU") activity for the six months ended June 30, 2024:

			Share units						Weighted-average grant date fair value
Unvested at December 31, 2023			2,075,007						$	19.49
Granted			1,496,407						16.71
Vested (1)			(920,876)						19.73
Forfeited			(108,071)						18.13
Unvested at June 30, 2024			2,542,467						$	17.83

(1) The number of RSUs vested includes shares that the Company withheld on behalf of employees to satisfy statutory tax withholding requirements.

Share-based Payment Arrangement, Performance Shares, Outstanding Activity

The following table summarizes the Company's PSU activity for the six months ended June 30, 2024:

			Share units						Weighted-average grant date fair value
Unvested at December 31, 2023			864,749						$	29.28
Granted			414,680						24.09
Vested (1)			(258,680)						28.49
Forfeited			(69,360)						27.60
Unvested at June 30, 2024			951,389						$	27.35

(1) The number of PSUs vested includes shares that the Company withheld on behalf of employees to satisfy statutory tax withholding requirements.

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