Schedule I (Details) - USD ($) $ in Millions		Dec. 31, 2024	Dec. 31, 2023
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	[1]	$ 154,901
Fair Value		150,302
Amount at Which Shown in the Balance Sheet		150,250
Private equities		14,769	$ 14,078
All Related Party [Member]
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Private equities		400
Short-term investments
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost		5,143
Fair Value		5,142
Amount at Which Shown in the Balance Sheet		5,142
Fixed maturities available for sale
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	[1]	115,013
Fair Value		110,363
Amount at Which Shown in the Balance Sheet		110,363
Fixed maturities available for sale | U.S. Treasury / Agency
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost		2,498
Fair Value		2,341
Amount at Which Shown in the Balance Sheet		2,341
Fixed maturities available for sale | Non-U.S.
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost		36,288
Fair Value		35,838
Amount at Which Shown in the Balance Sheet		35,838
Fixed maturities available for sale | Corporate and asset-backed securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost		45,184
Fair Value		43,207
Amount at Which Shown in the Balance Sheet		43,207
Fixed maturities available for sale | Mortgage-backed securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost		29,158
Fair Value		27,248
Amount at Which Shown in the Balance Sheet		27,248
Fixed maturities available for sale | Municipal
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost		1,885
Fair Value		1,729
Amount at Which Shown in the Balance Sheet		1,729
Private debt held for investment
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	[1]	2,628
Fair Value		2,680
Amount at Which Shown in the Balance Sheet		2,628
Industrial, miscellaneous, and all others
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost		9,151
Fair Value		9,151
Amount at Which Shown in the Balance Sheet		9,151
Private equities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost	[2]	14,369
Fair Value	[2]	14,369
Amount at Which Shown in the Balance Sheet	[2]	14,369
Other investments
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost		8,597
Fair Value		8,597
Amount at Which Shown in the Balance Sheet		$ 8,597

[1] Net of valuation allowance for expected credit losses.

[2] Excludes $400 million of related party investments.