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Variable Annuity and Insurance Guarantees (Separate Account Balance by Type) (Details 5) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Mutual funds |  |
Distribution of separate account balances by asset type for variable annuity contracts providing guaranteed benefits: |  |
Total mutual funds | $ 74,584 | $ 66,522
Equity |  |
Distribution of separate account balances by asset type for variable annuity contracts providing guaranteed benefits: |  |
Total mutual funds | 44,739 | 39,764
Bond |  |
Distribution of separate account balances by asset type for variable annuity contracts providing guaranteed benefits: |  |
Total mutual funds | 23,374 | 21,190
Other |  |
Distribution of separate account balances by asset type for variable annuity contracts providing guaranteed benefits: |  |
Total mutual funds | $ 6,471 | $ 5,568

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