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Discontinued Operations - Assets and liabilities of businesses disposed (Details) - USD ($) $ in Millions | Jun. 30, 2021 | May 31, 2021 | Dec. 31, 2020
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Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Total assets of discontinued annuity operations | $ 0 |  | $ 47,885
Liabilities of discontinued annuity operations | 0 |  | 44,458
Reclassify AOCI | 190 |  | 1,273
Net investment in annuity businesses sold, excluding AOCI | $ 5,601 |  | 6,789
Annuity subsidiaries |  |  |
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Cash and cash equivalents |  | $ 2,060 |
Investments |  | 38,322 |
Recoverables from reinsurers |  | 6,748 |
Other assets |  | 2,139 |
Total assets of discontinued annuity operations |  | 49,269 | 47,885
Annuity benefits accumulated |  | 43,690 |
Other liabilities |  | 1,801 |
Liabilities of discontinued annuity operations |  | 45,491 | 44,458
Receivable from AFG for real estate-related investments |  | 0 | 537
Reclassify AOCI |  | (913) | (1,071)
Net investment in annuity businesses sold, excluding AOCI |  | $ 2,865 | 2,893
Annuity subsidiaries | Assets of discontinued annuity operations |  |  |
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Cash and cash equivalents |  |  | 1,145
Investments |  |  | 38,011
Recoverables from reinsurers |  |  | 6,804
Other assets |  |  | 1,925
Annuity subsidiaries | Liabilities of discontinued annuity operations |  |  |
Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Annuity benefits accumulated |  |  | 42,573
Other liabilities |  |  | $ 1,885

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