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Income Taxes (Deferred Income Tax Assets and Liabilities) (Details 3) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Deferred income tax assets: |  |
Liabilities for policyholder account balances, future policy benefits and claims | $ 1,618 | $ 945
Deferred compensation | 493 | 406
Postretirement benefits | 65 | 45
Deferred Tax Assets Right of Use Lease Liability | 60 | 59
Investment related | 0 | 188
Other | 51 | 47
Gross deferred income tax assets | 2,287 | 1,690
Less: Valuation allowance | 15 | 19
Total deferred income tax assets | 2,272 | 1,671
Deferred income tax liabilities: |  |
Deferred acquisition costs | 435 | 456
Net unrealized gains on Available-for-Sale securities | 295 | 186
Deferred Tax Liabilities, Investments | 253 | 0
Intangible assets | 124 | 115
Depreciation expense | 99 | 94
Goodwill | 70 | 64
Deferred Tax Liabilities Right of Use Lease Asset | 54 | 54
Deferred sales inducement costs | 44 | 50
Other | 18 | 6
Gross deferred income tax liabilities | 1,392 | 1,025
Net deferred income tax liabilities | 880 | 646
Valuation Allowance [Line Items] |  |
Valuation allowance | 15 | $ 19
State net operating losses | 16 |
State and Local Jurisdiction [Member] |  |
Deferred income tax assets: |  |
Less: Valuation allowance | 2 |
Valuation Allowance [Line Items] |  |
Valuation allowance | 2 |
Operating Loss Carryforwards, Valuation Allowance | 11 |
Foreign Tax Authority [Member] |  |
Deferred income tax assets: |  |
Less: Valuation allowance | 2 |
Valuation Allowance [Line Items] |  |
Valuation allowance | $ 2 |

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