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Derivative Instruments (Change In Our Unrealized Gain On Derivative Instruments In Accumulated OCI) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Change in our unrealized gain on derivative instruments in accumulated OCI
Balance as of beginning-of-year	$ 8,931
Income tax benefit (expense)	(37)	$ 18
Balance as of end-of-period	5,761
Unrealized Gain (Loss) on Derivative Instruments [Member]
Change in our unrealized gain on derivative instruments in accumulated OCI
Balance as of beginning-of-year	(402)	(11)
Change in foreign currency exchange rate adjustment	47	153
Change in DAC, VOBA, DSI and DFEL	14	(53)
Income tax benefit (expense)	(30)	(8)
Associated amortization of DAC, VOBA, DSI and DFEL	(1)	(6)
Income tax benefit (expense)		(1)
Balance as of end-of-period	(284)	8
Unrealized Gain (Loss) on Derivative Instruments [Member] | Cash Flow Hedges [Member] | Interest Rate Contracts [Member]
Change in our unrealized gain on derivative instruments in accumulated OCI
Unrealized holding gains (losses) arising during the period	152	(383)
Unrealized Gain (Loss) on Derivative Instruments [Member] | Cash Flow Hedges [Member] | Interest Rate Contracts [Member] | Net Investment Income [Member]
Change in our unrealized gain on derivative instruments in accumulated OCI
Reclassification adjustment for gains (losses) included in net income (loss)	1
Unrealized Gain (Loss) on Derivative Instruments [Member] | Cash Flow Hedges [Member] | Interest Rate Contracts [Member] | Interest and Debt Expense [Member]
Change in our unrealized gain on derivative instruments in accumulated OCI
Reclassification adjustment for gains (losses) included in net income (loss)	(6)	(3)
Unrealized Gain (Loss) on Derivative Instruments [Member] | Cash Flow Hedges [Member] | Foreign currency contracts [Member]
Change in our unrealized gain on derivative instruments in accumulated OCI
Unrealized holding gains (losses) arising during the period	(63)	312
Unrealized Gain (Loss) on Derivative Instruments [Member] | Cash Flow Hedges [Member] | Foreign currency contracts [Member] | Net Investment Income [Member]
Change in our unrealized gain on derivative instruments in accumulated OCI
Reclassification adjustment for gains (losses) included in net income (loss)	10	11
Unrealized Gain (Loss) on Derivative Instruments [Member] | Cash Flow Hedges [Member] | Foreign currency contracts [Member] | Realized Gain (Loss) [Member]
Change in our unrealized gain on derivative instruments in accumulated OCI
Reclassification adjustment for gains (losses) included in net income (loss)	$ (2)	$ 1

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Associated amortization of deferred acquisition costs, value of business acquired, deferred sales inducements and deferred front-end loads associated with reclassification adjustments for realized gains and losses included in net income.

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Pre tax reclassification adjustment for accumulated gains and losses from derivative instrument designated and qualifying as the effective portion of cash flow hedges, fair value hedges, or a hedge of a net investment in a foreign subsidiary, included in accumulated comprehensive income that was realized in net income during the period.

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