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Acquisitions and Dispositions - Assets and liabilities recognized in acquisition (Details) - USD ($) $ in Millions | Sep. 30, 2021 | Jan. 04, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Assets |  |  |
Goodwill | $ 3,389 |  | $ 2,369
National General Holdings Corp. |  |  |
Assets |  |  |
Investments |  | $ 4,957 |
Cash |  | 400 |
Premiums and other receivables, net |  | 1,539 |
Deferred acquisition costs (value of business acquired) |  | 317 |
Reinsurance recoverables, net |  | 1,212 |
Intangible assets |  | 1,199 |
Other assets |  | 736 |
Goodwill |  | 1,010 |
Total assets |  | 11,370 |
Liabilities |  |  |
Reserve for property and casualty insurance claims and claims expense |  | 2,765 |
Reserve for future policy benefits |  | 186 |
Unearned premiums |  | 2,245 |
Reinsurance payable |  | 363 |
Debt |  | 593 |
Deferred tax liabilities |  | 145 |
Other liabilities |  | 763 |
Total liabilities |  | $ 7,060 |

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