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Investments - Repurchase Agreements (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Schedule of Repurchase Agreements [Line Items]
Payables for repurchase agreements	$ 6,261	$ 4,743
Amortized Cost	7,854	6,161
Fair Value	6,428	4,996
Less than 30 days
Schedule of Repurchase Agreements [Line Items]
Payables for repurchase agreements	2,071	608
30-90 days
Schedule of Repurchase Agreements [Line Items]
Payables for repurchase agreements	1,324	1,268
Greater than 1 year
Schedule of Repurchase Agreements [Line Items]
Payables for repurchase agreements	2,866	2,867
Available-for-sale Securities | Corporate
Schedule of Repurchase Agreements [Line Items]
Amortized Cost	3,923	1,940
Fair Value	3,197	1,605
Available-for-sale Securities | U.S. government and agencies
Schedule of Repurchase Agreements [Line Items]
Amortized Cost	2,307	2,559
Fair Value	1,792	1,941
Available-for-sale Securities | Collateralized Loan Obligations
Schedule of Repurchase Agreements [Line Items]
Amortized Cost	267	273
Fair Value	260	261
Available-for-sale Securities | Foreign governments
Schedule of Repurchase Agreements [Line Items]
Amortized Cost	141	146
Fair Value	103	107
Available-for-sale Securities | ABS
Schedule of Repurchase Agreements [Line Items]
Amortized Cost	1,216	1,243
Fair Value	$ 1,076	$ 1,082

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

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- Definition

[Line Items] for Schedule of Repurchase Agreements [Table]

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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
-Topic 860
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481420/860-30-50-7

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