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Policyholder Account Balances, Future Policy Benefits and Claims and Separate Account Liabilities Policyholder Account Balances, Future Policy Benefits and Claims and Separate Account Liabilities (Separate Account Liabilities) (Details 2) - USD ($) $ in Millions | Sep. 30, 2020 | Dec. 31, 2019
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Separate Accounts Disclosure [Abstract] |  |
Variable annuity | $ 73,919 | $ 74,965
VUL insurance | 7,400 | 7,429
Other insurance | 29 | 31
Threadneedle investment liabilities | 4,780 | 5,063
Separate account liabilities | $ 86,128 | $ 87,488

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- Definition The equivalent summary total of separate account assets representing contract holder funds related to other insurance policies, not otherwise described in the taxonomy. + References No definition available. + Details
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