Derivative Instruments (Financial Statement Classification and Impact of Derivatives Used in Qualifying and Non-qualifying Hedge Relationships) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Realized Investment Gains (Losses)
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	$ 1,492	$ (1,031)
Realized Investment Gains (Losses) | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	1,473	(1,020)
Net Investment Income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	82	72
Net Investment Income | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Other Income
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	286	(41)
Other Income | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	(5)	4
Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Interest Expense | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Interest Credited To Policyholders’ Account Balances
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	2	2
Interest Credited To Policyholders’ Account Balances | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Policyholder Benefts
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	2	5
Policyholder Benefts | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
AOCI
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	2,367	(43)
AOCI | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Fair value hedges | Realized Investment Gains (Losses) | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	(28)	(6)
Fair value hedges | Net Investment Income | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	(2)	(2)
Fair value hedges | Other Income | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Fair value hedges | Interest Expense | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Fair value hedges | Interest Credited To Policyholders’ Account Balances | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	324	68
Fair value hedges | Policyholder Benefts | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	280	51
Fair value hedges | AOCI | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Fair Value Hedged Item | Realized Investment Gains (Losses)
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	29	3
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument	1	(3)
Fair Value Hedged Item | Net Investment Income
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	5	6
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument	3	4
Fair Value Hedged Item | Other Income
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	0	0
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument	0	0
Fair Value Hedged Item | Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	0	0
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument	0	0
Fair Value Hedged Item | Interest Credited To Policyholders’ Account Balances
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(322)	(66)
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument	2	2
Fair Value Hedged Item | Policyholder Benefts
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(278)	(46)
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument	2	5
Fair Value Hedged Item | AOCI
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	0	0
Change In Unrealized Gain (Loss) On Hedged Item In Fair Value Net Of Hedging Instrument	0	0
Cash flow hedges | Realized Investment Gains (Losses) | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	18	(8)
Cash flow hedges | Net Investment Income | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	79	68
Cash flow hedges | Other Income | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	291	(45)
Cash flow hedges | Interest Expense | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Cash flow hedges | Interest Credited To Policyholders’ Account Balances | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Cash flow hedges | Policyholder Benefts | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Cash flow hedges | AOCI | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	2,354	(44)
Net investment hedges | Realized Investment Gains (Losses) | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Net investment hedges | Net Investment Income | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Net investment hedges | Other Income | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Net investment hedges | Interest Expense | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Net investment hedges | Interest Credited To Policyholders’ Account Balances | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Net investment hedges | Policyholder Benefts | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Net investment hedges | AOCI | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	13	1
Interest Rate | Realized Investment Gains (Losses) | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	9,224	1,389
Interest Rate | Net Investment Income | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Interest Rate | Other Income | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Interest Rate | Interest Expense | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Interest Rate | Interest Credited To Policyholders’ Account Balances | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Interest Rate | Policyholder Benefts | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Interest Rate | AOCI | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Interest Rate | Fair value hedges | Realized Investment Gains (Losses) | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	(30)	(5)
Interest Rate | Fair value hedges | Net Investment Income | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	(2)	(2)
Interest Rate | Fair value hedges | Other Income | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Interest Rate | Fair value hedges | Interest Expense | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Interest Rate | Fair value hedges | Interest Credited To Policyholders’ Account Balances | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	324	68
Interest Rate | Fair value hedges | Policyholder Benefts | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	280	51
Interest Rate | Fair value hedges | AOCI | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Interest Rate | Fair Value Hedged Item | Realized Investment Gains (Losses)
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	30	2
Interest Rate | Fair Value Hedged Item | Net Investment Income
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	5	5
Interest Rate | Fair Value Hedged Item | Other Income
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	0	0
Interest Rate | Fair Value Hedged Item | Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	0	0
Interest Rate | Fair Value Hedged Item | Interest Credited To Policyholders’ Account Balances
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(322)	(66)
Interest Rate | Fair Value Hedged Item | Policyholder Benefts
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(278)	(46)
Interest Rate | Fair Value Hedged Item | AOCI
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	0	0
Interest Rate | Cash flow hedges | Realized Investment Gains (Losses) | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	(1)	(1)
Interest Rate | Cash flow hedges | Net Investment Income | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Interest Rate | Cash flow hedges | Other Income | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Interest Rate | Cash flow hedges | Interest Expense | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Interest Rate | Cash flow hedges | Interest Credited To Policyholders’ Account Balances | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Interest Rate | Cash flow hedges | Policyholder Benefts | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Interest Rate | Cash flow hedges | AOCI | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	52	23
Currency | Realized Investment Gains (Losses) | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	333	(39)
Currency | Net Investment Income | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | Other Income | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	(7)	4
Currency | Interest Expense | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | Interest Credited To Policyholders’ Account Balances | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | Policyholder Benefts | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | AOCI | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | Fair value hedges | Realized Investment Gains (Losses) | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	2	(1)
Currency | Fair value hedges | Net Investment Income | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | Fair value hedges | Other Income | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | Fair value hedges | Interest Expense | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | Fair value hedges | Interest Credited To Policyholders’ Account Balances | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | Fair value hedges | Policyholder Benefts | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | Fair value hedges | AOCI | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | Fair Value Hedged Item | Realized Investment Gains (Losses)
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	(1)	1
Currency | Fair Value Hedged Item | Net Investment Income
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	0	1
Currency | Fair Value Hedged Item | Other Income
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	0	0
Currency | Fair Value Hedged Item | Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	0	0
Currency | Fair Value Hedged Item | Interest Credited To Policyholders’ Account Balances
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	0	0
Currency | Fair Value Hedged Item | Policyholder Benefts
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	0	0
Currency | Fair Value Hedged Item | AOCI
Derivative Instruments, Gain (Loss) [Line Items]
Change in Unrealized Gain (Loss) on Hedged Item in Fair Value Hedge	0	0
Currency | Cash flow hedges | Realized Investment Gains (Losses) | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	1	1
Currency | Cash flow hedges | Net Investment Income | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | Cash flow hedges | Other Income | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | Cash flow hedges | Interest Expense | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | Cash flow hedges | Interest Credited To Policyholders’ Account Balances | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | Cash flow hedges | Policyholder Benefts | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | Cash flow hedges | AOCI | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	102	(9)
Currency | Net investment hedges | Realized Investment Gains (Losses) | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | Net investment hedges | Net Investment Income | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | Net investment hedges | Other Income | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | Net investment hedges | Interest Expense | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | Net investment hedges | Interest Credited To Policyholders’ Account Balances | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | Net investment hedges | Policyholder Benefts | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency | Net investment hedges | AOCI | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	13	1
Currency/Interest Rate | Realized Investment Gains (Losses) | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	816	184
Currency/Interest Rate | Net Investment Income | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency/Interest Rate | Other Income | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	2	0
Currency/Interest Rate | Interest Expense | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency/Interest Rate | Interest Credited To Policyholders’ Account Balances | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency/Interest Rate | Policyholder Benefts | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency/Interest Rate | AOCI | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency/Interest Rate | Cash flow hedges | Realized Investment Gains (Losses) | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	18	(8)
Currency/Interest Rate | Cash flow hedges | Net Investment Income | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	79	68
Currency/Interest Rate | Cash flow hedges | Other Income | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	291	(45)
Currency/Interest Rate | Cash flow hedges | Interest Expense | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency/Interest Rate | Cash flow hedges | Interest Credited To Policyholders’ Account Balances | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency/Interest Rate | Cash flow hedges | Policyholder Benefts | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency/Interest Rate | Cash flow hedges | AOCI | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	2,200	(58)
Currency/Interest Rate | Net investment hedges | Realized Investment Gains (Losses) | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency/Interest Rate | Net investment hedges | Net Investment Income | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency/Interest Rate | Net investment hedges | Other Income | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency/Interest Rate | Net investment hedges | Interest Expense | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency/Interest Rate | Net investment hedges | Interest Credited To Policyholders’ Account Balances | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency/Interest Rate | Net investment hedges | Policyholder Benefts | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Currency/Interest Rate | Net investment hedges | AOCI | Derivatives Designated as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Credit | Realized Investment Gains (Losses) | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	(41)	69
Credit | Net Investment Income | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Credit | Other Income | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Credit | Interest Expense | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Credit | Interest Credited To Policyholders’ Account Balances | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Credit | Policyholder Benefts | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Credit | AOCI | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Equity | Realized Investment Gains (Losses) | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	5,436	(1,811)
Equity | Net Investment Income | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Equity | Other Income | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Equity | Interest Expense | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Equity | Interest Credited To Policyholders’ Account Balances | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Equity | Policyholder Benefts | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Equity | AOCI | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Other | Realized Investment Gains (Losses) | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Other | Net Investment Income | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Other | Other Income | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Other | Interest Expense | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Other | Interest Credited To Policyholders’ Account Balances | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Other | Policyholder Benefts | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Other | AOCI | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Embedded Derivatives | Realized Investment Gains (Losses) | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	(14,295)	(812)
Embedded Derivatives | Net Investment Income | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Embedded Derivatives | Other Income | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Embedded Derivatives | Interest Expense | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Embedded Derivatives | Interest Credited To Policyholders’ Account Balances | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Embedded Derivatives | Policyholder Benefts | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	0	0
Embedded Derivatives | AOCI | Derivatives Not Qualifying as Hedge Accounting Instruments:
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Gain (Loss) Recognized In Income Net	$ 0	$ 0