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Investments - Repurchase Agreements (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Secured Debt, Repurchase Agreements	$ 4,743	$ 3,110
Foreign currency forwards
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements, Amortized Cost	6,161	2,923
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements, Fair Value	4,996	3,208
Maturity Overnight and on Demand [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Secured Debt, Repurchase Agreements	0	0
Maturity Less than 30 Days [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Secured Debt, Repurchase Agreements	608	2,512
Maturity 30 to 90 Days [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Secured Debt, Repurchase Agreements	1,268	0
Maturity Greater than 1 Year [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Secured Debt, Repurchase Agreements	2,867	598
90 Days to 1 Year [Member]
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Secured Debt, Repurchase Agreements	0	0
Corporate | Foreign currency forwards
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements, Amortized Cost	1,940	2,923
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements, Fair Value	1,605	3,208
US government and agencies | Foreign currency forwards
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements, Amortized Cost	2,559	0
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements, Fair Value	1,941	0
Collateralized Loan Obligations | Foreign currency forwards
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements, Amortized Cost	273	0
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements, Fair Value	261	0
Foreign governments | Foreign currency forwards
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements, Amortized Cost	146	0
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements, Fair Value	107	0
ABS | Foreign currency forwards
Transfer of Certain Financial Assets Accounted for as Secured Borrowings [Line Items]
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements, Amortized Cost	1,243	0
Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements, Fair Value	$ 1,082	$ 0

X

- Definition

Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements, Fair Value

+ References

No definition available.

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- Definition

Pledged Financial Instruments, Not Separately Reported, Securities for Repurchase Agreements, Amortized Cost

+ References

No definition available.

+ Details

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- Definition

Carrying value, as of the balance sheet date, of securities sold under agreements to repurchase where the transferor maintains effective control over the assets, accounting for them as secured debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 50
-Paragraph 7
-URI https://asc.fasb.org/extlink&oid=109249958&loc=SL34722452-111729

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- Definition

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

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