Retirement Benefits - Schedule of Deferred Compensation Plan (Details) - Supplemental Employee Retirement Plan - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	$ 18.7	$ 16.3
Deferred compensation liability at fair value	22.9	18.9
Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	2.3	1.2
Corporate-owned life insurance policies
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	16.4	15.1
Quoted Prices in Active  Market (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	2.3	1.2
Deferred compensation liability at fair value	22.9	18.9
Quoted Prices in Active  Market (Level 1) | Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	2.3	1.2
Quoted Prices in Active  Market (Level 1) | Corporate-owned life insurance policies
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0.0	0.0
Significant Other Observable  Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	16.4	15.1
Deferred compensation liability at fair value	0.0	0.0
Significant Other Observable  Inputs (Level 2) | Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0.0	0.0
Significant Other Observable  Inputs (Level 2) | Corporate-owned life insurance policies
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	16.4	15.1
Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0.0	0.0
Deferred compensation liability at fair value	0.0	0.0
Significant Unobservable Inputs (Level 3) | Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	0.0	0.0
Significant Unobservable Inputs (Level 3) | Corporate-owned life insurance policies
Defined Benefit Plan Disclosure [Line Items]
Total assets at fair value	$ 0.0	$ 0.0