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Income Taxes - Narrative (Details) £ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Dec. 31, 2020 GBP (£)
Income Tax Reconciliation [Line Items] |  |  |  |
Statutory rate of income taxes | 21.00% | 21.00% | 21.00% |
Income tax expense (benefit) | $ 127 | $ 239 | $ 122 |
Effective income tax rate reconciliation, percent, excluding the Impact of the sale of subsidiaries | 21.00% |  |  |
Income (losses) subject to tax in foreign jurisdictions | $ (131) | (109) | (69) |
Operating loss carryforwards, valuation allowance | 15 |  |  |
Interest on income taxes accrued | 0 | 0 |  |
Amount of expense for penalties related to a tax position | 0 |  |  |
Cash payments for income taxes | $ 179 | 278 | 156 |
Limitation on the use of tax credit carryforwards | A SRLY NOL can be used only by the entity that created it and only in years that both it and the consolidated group have taxable income. Approximately $23 million of AFG’s SRLY NOLs expired unutilized at December 31, 2020. |  |  |
Neon Capital Limited |  |  |  |
Income Tax Reconciliation [Line Items] |  |  |  |
Income tax expense (benefit) | $ (72) |  |  |
Income tax benefit, portion attributable to current taxes payable | (65) |  |  |
AFG |  |  |  |
Income Tax Reconciliation [Line Items] |  |  |  |
Income tax expense (benefit) | 127 | 239 | 122 |
Unrecognized tax benefits that would impact the effective tax rate | 0 | 0 |  |
Interest included in tax provision | 0 | 0 |  |
Income tax penalties accrued | 0 | 0 |  |
Charge for valuation allowance |  |  |  |
Income Tax Reconciliation [Line Items] |  |  |  |
Charge for valuation allowance against deferred tax assets |  | 118 |  |
Maximum | AFG |  |  |  |
Income Tax Reconciliation [Line Items] |  |  |  |
Interest included in tax provision |  |  | 1 |
Amount of expense for penalties related to a tax position |  | $ 1 | $ 1 |
Amount unutilized |  |  |  |
Income Tax Reconciliation [Line Items] |  |  |  |
Operating loss carryforwards | 23 |  |  |
United Kingdom |  |  |  |
Income Tax Reconciliation [Line Items] |  |  |  |
Operating loss carryforwards | $ 34 |  |  | £ 25

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