Income Taxes Income Taxes - NOL Usage Table (Details) $ in Thousands	Dec. 31, 2025 USD ($)
Net Income Loss Reconciliation [Line Items]
NOL allocated amount	$ 1,690,842
Loss Carryforward Indefinite Life	118,910
AFG [Member]
Net Income Loss Reconciliation [Line Items]
NOL allocated amount	1,690,842
State and Local Jurisdiction
Net Income Loss Reconciliation [Line Items]
NOL allocated amount	231,347
State and Local Jurisdiction | Capital Loss Carryforward
Net Income Loss Reconciliation [Line Items]
NOL allocated amount	3,910,514
United Kingdom
Net Income Loss Reconciliation [Line Items]
NOL allocated amount	$ 17,286