Employee Benefit Plans - Narrative (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2026	Dec. 31, 2025	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Treasury stock, shares repurchased (in shares)	8.6		4.4		5.1
Cash payments related to the settlement of restricted stock units	$ 26.0		$ 24.0		$ 24.1
Options, vested and expected to vest, exercisable, aggregate intrinsic value	50.5
Aggregate intrinsic value of stock options outstanding and exercisable	$ 50.5
Weighted average remaining life of stock options outstanding and exercisable	3 years
Options, exercisable, weighted average remaining contractual term	3 years
Aggregate intrinsic value for options exercised	$ 20.6		134.0		63.2
Defined benefit plan, accumulated benefit obligation	1,638.0		1,694.9
Net actuarial loss included in accumulated other comprehensive income (loss)	210.5
Prior service cost included in accumulated other comprehensive income (loss)	$ 0.9
Minimum interest crediting rate	3.25%
Plan assets	$ 1,985.2		1,938.2		$ 1,879.6
Employer contributions	17.8		20.1
Expected future employer contributions, next fiscal year	8.2
Expected future plan benefit payment - 2027	117.6
Expected future plan benefit payment - 2028	123.0
Expected future plan benefit payment - 2029	126.7
Expected future plan benefit payment - 2030	130.5
Expected future plan benefit payment - 2031	134.6
Expected future plan benefit payment - 2032 to 2036	$ 662.9
Defined contribution plan, maximum annual contribution per employee, percent	50.00%
Highly compensated employee contribution percentage to retirement and saving plan	12.00%
Defined contribution plan, cost		$ 199.9		$ 191.2		$ 184.1
Cash and cash equivalents
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Plan assets	$ 21.7		$ 104.9
Time-Based Restricted Stock
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting term options granted	3 years
Performance Based Restricted Stock and Units
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Minimum percentage that will ultimately vest under performance-based restricted stock awards based on performance target	0.00%
Maximum percentage that will ultimately vest under performance-based restricted stock awards based on performance target	200.00%
Performance Based Restricted Stock and Units | Minimum
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Performance period (years)	1 year
Performance Based Restricted Stock and Units | Maximum
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting term options granted	38 months
Performance period (years)	3 years
Employee Stock
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Shares available for future grants (in shares)	4.3
Authorized for issuance under the employee stock purchase plan (in shares)	70.0
Purchase price of common stock as percentage of market value	95.00%
Restricted Stock Units (RSUs)
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost	$ 216.1
Weighted-average remaining requisite vesting period	1 year 8 months 12 days
Stock-Based Compensation Plan
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Shares available for future grants (in shares)	18.4
Authorized for issuance under the employee stock purchase plan (in shares)	26.6