Variable Interest Entities and Equity Method Investments - Variable Interest Entities (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Variable Interest Entity [Line Items]
Equity securities, at fair value	$ 1,200	$ 1,404
Real estate	2,050	755
Real estate partnerships	4,279	2,856
Short-term investments	1,945	2,397
Other invested assets	955	120
Cash and cash equivalents	13,895	3,192
Other invested assets	2,055	541
Total assets	118,618	35,885
Notes payable	657	174
Total liabilities	109,361	29,986
Mortgage Receivable
Variable Interest Entity [Line Items]
Financing receivables	12,042	5,658
Private Loan
Variable Interest Entity [Line Items]
Financing receivables	1,724	194
Consolidated Variable Interest Entities
Variable Interest Entity [Line Items]
Fixed maturity securities, available for sale	44	63
Equity securities, at fair value	115	15
Real estate	1,628	172
Real estate partnerships	1,055	0
Investment funds	487	4
Short-term investments	0	4
Other invested assets	150	0
Cash and cash equivalents	132	26
Other invested assets	158	61
Total assets	3,965	533
Notes payable	175	174
Other liabilities	94	14
Total liabilities	269	188
Consolidated Variable Interest Entities | Private Loan
Variable Interest Entity [Line Items]
Financing receivables	196	188
Unconsolidated Variable Interest Entities
Variable Interest Entity [Line Items]
Fixed maturity securities, available for sale	2,100	0
Real estate partnerships	889	301
Short-term investments	57	0
Other invested assets	157	0
Total assets	3,876	933
Maximum Exposure to Loss	3,952	933
Unconsolidated Variable Interest Entities | Fixed maturity securities, available for sale
Variable Interest Entity [Line Items]
Maximum Exposure to Loss	2,100	0
Unconsolidated Variable Interest Entities | Real estate partnerships
Variable Interest Entity [Line Items]
Maximum Exposure to Loss	892	301
Unconsolidated Variable Interest Entities | Short-term investments
Variable Interest Entity [Line Items]
Maximum Exposure to Loss	57	0
Unconsolidated Variable Interest Entities | Other invested assets
Variable Interest Entity [Line Items]
Maximum Exposure to Loss	157	0
Unconsolidated Variable Interest Entities | Mortgage Receivable
Variable Interest Entity [Line Items]
Financing receivables	673	632
Unconsolidated Variable Interest Entities | Mortgage Receivable | Mortgage loans on real estate
Variable Interest Entity [Line Items]
Maximum Exposure to Loss	$ 746	$ 632