Employee Benefit Plans - Narrative (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Treasury stock, shares repurchased (in shares)	4.4		5.1		4.9
Cash payments for Restricted Stock Units	$ 24.0		$ 24.1		$ 23.5
Aggregate intrinsic value of stock options outstanding and exercisable	149.3
Options, vested and expected to vest, exercisable, aggregate intrinsic value	$ 133.7
Weighted average remaining life of stock options outstanding and exercisable	4 years
Options, exercisable, weighted average remaining contractual term	4 years
Aggregate intrinsic value for options exercised	$ 134.0		63.2		80.6
Defined benefit plan, accumulated benefit obligation	1,694.9		1,688.5
Accumulated other comprehensive income net gains (losses), after tax	280.2
Accumulated other comprehensive income net prior service cost (credit), after tax	$ 2.2
Minimum interest crediting rate	3.25%
Plan assets	$ 1,938.2		1,879.6		$ 1,854.4
Employer contributions	20.1		13.4
Expected future employer contributions, next fiscal year	9.7
Expected future plan benefit payment - 2026	142.4
Expected future plan benefit payment - 2027	154.7
Expected future plan benefit payment - 2028	157.4
Expected future plan benefit payment - 2029	130.0
Expected future plan benefit payment - 2030	130.3
Expected future plan benefit payment - 2031 to 2035	$ 681.1
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		$ 191.2		$ 184.1		$ 163.6
Cash and cash equivalents
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Plan assets	$ 104.9		$ 10.4
Time-based restricted shares/units
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)	4.6
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%
Non-Vested Stock Options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost	$ 0.3
Weighted-average remaining requisite vesting period	2 months 12 days
Restricted Stock Units (RSUs)
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost	$ 206.8
Weighted-average remaining requisite vesting period	1 year 8 months 12 days
Non-Vested Restricted Stock
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total remaining unrecognized compensation cost	$ 0.8
Weighted-average remaining requisite vesting period	2 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)	19.3
Authorized for issuance under the employee stock purchase plan (in shares)	26.6