Employee Benefits - Narrative (Details) $ in Millions	Sep. 30, 2025 USD ($)
U.K.
Defined Benefit Plan Disclosure [Line Items]
Expected future employer cash contribution	$ 2
Other
Defined Benefit Plan Disclosure [Line Items]
Expected future employer cash contribution	10
U.S.
Defined Benefit Plan Disclosure [Line Items]
Expected future employer cash contribution	$ 76