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v3.20.1

Fair Value, Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Recurring Basis [Member] - USD ($) $ in Millions | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Payable to Brokers [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Liabilities | $ (87) | $ (28)
Fixed Maturities Available-for-Sale [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 40,083 | 42,187
Corporate Bonds and Other [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 21,361 | 22,708
States, Municipalities and Political Subdivisions [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 10,491 | 10,652
Asset-Backed [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 8,231 | 8,827
Fixed Maturities Trading [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 41 | 53
Total Fixed Maturities [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 40,124 | 42,240
Equity Securities [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 1,182 | 1,306
Short-term and Other [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 3,627 | 4,521
Receivables [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets |  | 2
Level 1 [Member] | Payable to Brokers [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Liabilities | (55) | (18)
Level 1 [Member] | Fixed Maturities Available-for-Sale [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 175 | 175
Level 1 [Member] | Corporate Bonds and Other [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 175 | 175
Level 1 [Member] | Total Fixed Maturities [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 175 | 175
Level 1 [Member] | Equity Securities [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 628 | 629
Level 1 [Member] | Short-term and Other [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 3,224 | 3,138
Level 2 [Member] | Payable to Brokers [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Liabilities | (32) | (10)
Level 2 [Member] | Fixed Maturities Available-for-Sale [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 39,215 | 41,379
Level 2 [Member] | Corporate Bonds and Other [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 20,690 | 22,065
Level 2 [Member] | States, Municipalities and Political Subdivisions [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 10,491 | 10,652
Level 2 [Member] | Asset-Backed [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 8,034 | 8,662
Level 2 [Member] | Fixed Maturities Trading [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 38 | 49
Level 2 [Member] | Total Fixed Maturities [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 39,253 | 41,428
Level 2 [Member] | Equity Securities [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 538 | 658
Level 2 [Member] | Short-term and Other [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 403 | 1,383
Level 2 [Member] | Receivables [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets |  | 2
Level 3 [Member] | Fixed Maturities Available-for-Sale [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 693 | 633
Level 3 [Member] | Corporate Bonds and Other [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 496 | 468
Level 3 [Member] | Asset-Backed [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 197 | 165
Level 3 [Member] | Fixed Maturities Trading [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 3 | 4
Level 3 [Member] | Total Fixed Maturities [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | 696 | 637
Level 3 [Member] | Equity Securities [Member] |  |
Assets and Liabilities Measured at Fair Value [Abstract] |  |
Assets | $ 16 | $ 19

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