Offsetting of Assets and Liabilities - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Derivative [Line Items]
Gross amounts not offset in the balance sheet, received from	$ 2.7	$ 23.6
Gross amounts not offset in the balance sheet, deposited	0.0	0.0
Aggregate fair value of all derivative instruments with credit-risk-related contingent features that are in a liability position	306.7	1,600.0
Collateral deposited with derivative counterparties for derivatives instruments with credit-risk-related contingent features that are in a liability position	299.1	1,400.0
Assets needed for immediate settlement, aggregate fair value	7.6	158.8
Net Investment Hedges
Derivative [Line Items]
Gross amounts not offset in the balance sheet, received from	420.8
Gross amounts not offset in the balance sheet, deposited	$ 144.1
Cash collateral received from derivative counterparties not offset against derivative assets		140.6
Cash collateral deposited with derivative counterparties not offset against derivative liabilities		$ 36.4