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	Jun. 30, 2021	Dec. 31, 2020
Separate account liabilities
Variable annuity	$ 82,584	$ 79,299
VUL insurance	8,998	8,226
Other insurance	33	31
Threadneedle investment liabilities	5,239	5,055
Separate account liabilities	$ 96,854	$ 92,611