Stock-based Compensation and Other Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2025

Share-Based Payment Arrangement [Abstract]

Fair Value Measurement Inputs and Valuation Techniques

The fair value of each RSU is based on the grant-date fair market value of the awards. The fair value of the Company's RSUs, other than the TSR components thereof, were determined on the grant date based on the closing market price for the Company's stock. The fair values of the TSR components of the awards were $4.34, $11.21, and $6.41 per share for the 2025, 2024 and 2023 awards, respectively, determined on the grant date using a Monte Carlo simulation model based on the following assumptions:

	2025		2024		2023
Expected term (years)	3.0		3.0		3.0
Dividend yield	—		—		—
Volatility factor	33.3	%	32.9	%	36.0	%
Risk-free interest rate	3.9	%	4.3	%	3.7	%

Share-based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]

A summary of the Company’s RSU activity is presented below (in millions, except fair value per unit): 

	Performance/Market and Service Conditions	Service Conditions	Total	Weighted-Average Grant-Date Fair Value Per Unit
December 31, 2024	0.5	0.5	1.0		$	93.66
Granted	0.4	0.8	1.2		68.99
Vested	(0.1)	(0.3)	(0.4)		96.28
Forfeited	(0.1)	(0.1)	(0.2)		92.32
December 31, 2025	0.7	0.9	1.6		75.58
Expected to vest	0.6	0.9	1.5		75.59

Schedule of Share-based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions

The fair values of the options granted under the ESPP were estimated using the Black-Scholes valuation model at the date of grant based on the following assumptions:

	Year Ended December 31,
	2025		2024		2023
Expected term (years)	0.5		0.5		0.5
Dividend yield	—		—		—
Expected volatility	30.7 - 33.9%		27.3 - 29.8%		38.1 - 38.7%
Weighted-average risk-free interest rate	4.1 - 4.2%		5.1 - 5.3%		3.8 - 4.7%
Average Black-Scholes valuation per share	$	19.50	$	21.27	$	23.01
Shares issued (millions)	0.3		0.2		0.3
Stock-based compensation expense (millions)	$	4.2	$	4.8	$	6.1