Derivative Financial Instruments - Net Realized Gains (Losses) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Derivatives, Fair Value [Line Items]
Net Investment Income	$ 420	$ 482	$ 869	$ 971
Other net gains (losses)	(134)	(35)	(311)	405
Derivative, Gain (Loss) on Derivative, Net	15	(21)	71	(9)
Interest rate contracts \| Other Comprehensive Income (Loss) \| Designated as Hedging Instrument \| Cash flow hedges
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	0	(1)	(1)
Interest rate contracts \| Investment Income \| Designated as Hedging Instrument \| Cash flow hedges
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	0	0	0	0
Interest rate contracts \| Other Net Realized Capital Gains (Losses) \| Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	6	(9)	57	(44)
Foreign exchange contracts \| Other Comprehensive Income (Loss) \| Designated as Hedging Instrument \| Cash flow hedges
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	45	5	51	10
Foreign exchange contracts \| Investment Income \| Designated as Hedging Instrument \| Cash flow hedges
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	3	2	5	(1)
Net realized gains (losses) on derivatives	3	2	5	4
Foreign exchange contracts \| Other Net Realized Capital Gains (Losses) \| Designated as Hedging Instrument \| Cash flow hedges
Derivatives, Fair Value [Line Items]
Net realized gains (losses) on derivatives	0	0	0	(5)
Foreign exchange contracts \| Other Net Realized Capital Gains (Losses) \| Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	3	(1)	4	(1)
Fixed maturities \| Other Net Realized Capital Gains (Losses)
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(1)	0	(3)	(2)
Product \| Other Net Realized Capital Gains (Losses)
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	10	(12)	19	33
Managed Custody Guarantees \| Gain (Loss) on Investments
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	1	0	(2)	4
Credit contracts \| Other Net Realized Capital Gains (Losses) \| Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (4)	$ 1	$ (4)	$ 1

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4D
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-URI https://asc.fasb.org/extlink&oid=125515794&loc=SL5624177-113959

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Subparagraph (c)
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Amount of gain (loss) included in earnings for investments classified as other.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
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Amount, after investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(2))
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