Offsetting of Assets and Liabilities (Narrative) (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Offsetting Assets and Liabilities [Line Items]
Collateral received	$ 89.7	$ 2.7
Gross amounts not offset in the balance sheet	0.0	0.0
Aggregate fair value of all derivative instruments with credit-risk-related contingent features that are in a liability position	248.8	306.7
Collateral deposited with derivative counterparties for derivatives instruments with credit-risk-related contingent features that are in a liability position	246.6	299.1
Net maximum amount of termination payments that could have been required	2.2	7.6
Net Investment Hedges
Offsetting Assets and Liabilities [Line Items]
Collateral received	73.3
Gross amounts not offset in the balance sheet	$ 423.9
Cash collateral received from derivative counterparties and not offset against derivative assets		420.8
Cash collateral deposited with derivative counterparties not offset against derivative liabilities		$ 144.1