Fair Value of Assets and Liabilities (Balances of Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - USD ($)
$ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
$ 109,270
|
[1] |
$ 101,769
|
[2] |
| Equity Method Investments, Fair Value Disclosure |
|
302
|
[1] |
311
|
[2] |
| Funds withheld at interest embedded derivatives |
|
(167)
|
[1] |
(128)
|
[2] |
| Funds Held Under Reinsurance Agreements, Asset Fair Value Disclosure |
|
61
|
[1] |
61
|
[2] |
| Cash and cash equivalents |
|
3,157
|
[1] |
2,460
|
[2] |
| Short-term investments |
|
318
|
[1] |
255
|
[2] |
| Derivative Assets (Liabilities), at Fair Value, Net |
|
211
|
[1] |
185
|
[2] |
| Investments, Fair Value Disclosure |
|
226
|
[1] |
202
|
[2] |
| Assets, Fair Value Disclosure |
|
113,212
|
[1] |
104,933
|
[2] |
| Liabilities Fair Value Disclosure |
|
|
|
|
|
| Fair Value Measured On Recurring Basis Guaranteed Interest Contracts Embedded Derivatives |
|
434
|
|
470
|
|
| Funds Held under Reinsurance Agreements, Liability |
|
(6,394)
|
|
(6,805)
|
|
| Other liabilities |
|
(699)
|
|
(599)
|
|
| Financial Liabilities Fair Value Disclosure |
|
994
|
|
1,010
|
|
| Fair Value, Net Asset (Liability) |
|
875
|
|
925
|
|
| Derivative Liability |
|
(139)
|
|
(59)
|
|
| Derivative Asset |
|
2
|
|
3
|
|
| Real Estate Investments Joint Ventures Fair Value Disclosure |
|
43
|
|
0
|
|
| Fair Value Option Contractholder Directed Unit Linked Investments [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Investments, Fair Value Disclosure |
|
15
|
[1] |
17
|
[2] |
| Corporate Debt Securities [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
76,827
|
[1] |
69,737
|
[2] |
| Canadian and Canadian provincial governments |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
4,927
|
[1] |
5,100
|
[2] |
| Residential mortgage-backed securities |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
1,844
|
[1] |
1,569
|
[2] |
| Asset-backed Securities [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
7,060
|
[1] |
7,369
|
[2] |
| Assets, Fair Value Disclosure |
|
1,248
|
|
1,329
|
|
| Commercial Mortgage Backed Securities [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
2,478
|
[1] |
2,162
|
[2] |
| US Treasury and Government [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
2,108
|
[1] |
3,287
|
[2] |
| US States and Political Subdivisions Debt Securities [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
674
|
[1] |
660
|
[2] |
| Debt Security, Government, Non-US [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
5,488
|
[1] |
5,872
|
[2] |
| Japanese Government |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
6,807
|
[1] |
4,701
|
[2] |
| Korean Government Debt Securities |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
[1] |
1,057
|
|
1,312
|
|
| Fair Value Inputs Level 1 Member |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
1,900
|
[1] |
3,074
|
[2] |
| Equity Method Investments, Fair Value Disclosure |
|
208
|
[1] |
213
|
[2] |
| Funds withheld at interest embedded derivatives |
|
0
|
[1] |
0
|
[2] |
| Funds Held Under Reinsurance Agreements, Asset Fair Value Disclosure |
|
0
|
[1] |
0
|
[2] |
| Cash and cash equivalents |
|
3,004
|
[1] |
2,460
|
[2] |
| Short-term investments |
|
200
|
[1] |
156
|
[2] |
| Derivative Assets (Liabilities), at Fair Value, Net |
|
0
|
[1] |
0
|
[2] |
| Investments, Fair Value Disclosure |
|
0
|
[1] |
0
|
[2] |
| Assets, Fair Value Disclosure |
|
5,312
|
[1] |
5,903
|
[2] |
| Liabilities Fair Value Disclosure |
|
|
|
|
|
| Fair Value Measured On Recurring Basis Guaranteed Interest Contracts Embedded Derivatives |
|
0
|
|
0
|
|
| Other liabilities |
|
0
|
|
0
|
|
| Financial Liabilities Fair Value Disclosure |
|
0
|
|
0
|
|
| Derivative Liability |
|
0
|
|
0
|
|
| Derivative Asset |
|
0
|
|
0
|
|
| Real Estate Investments Joint Ventures Fair Value Disclosure |
|
0
|
|
0
|
|
| Fair Value Inputs Level 1 Member | Fair Value Option Contractholder Directed Unit Linked Investments [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Investments, Fair Value Disclosure |
|
0
|
[1] |
0
|
[2] |
| Fair Value Inputs Level 1 Member | Corporate Debt Securities [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
0
|
[1] |
0
|
[2] |
| Fair Value Inputs Level 1 Member | Canadian and Canadian provincial governments |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
0
|
[1] |
0
|
[2] |
| Fair Value Inputs Level 1 Member | Residential mortgage-backed securities |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
0
|
[1] |
0
|
[2] |
| Fair Value Inputs Level 1 Member | Asset-backed Securities [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
0
|
[1] |
0
|
[2] |
| Fair Value Inputs Level 1 Member | Commercial Mortgage Backed Securities [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
0
|
[1] |
0
|
[2] |
| Fair Value Inputs Level 1 Member | US Treasury and Government [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
1,900
|
[1] |
3,074
|
[2] |
| Fair Value Inputs Level 1 Member | US States and Political Subdivisions Debt Securities [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
0
|
[1] |
0
|
[2] |
| Fair Value Inputs Level 1 Member | Debt Security, Government, Non-US [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
0
|
[1] |
0
|
[2] |
| Fair Value Inputs Level 1 Member | Japanese Government |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
0
|
[1] |
0
|
[2] |
| Fair Value Inputs Level 1 Member | Korean Government Debt Securities |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
[1] |
0
|
|
0
|
|
| Fair Value Inputs Level 2 Member |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
93,207
|
[1] |
84,943
|
[2] |
| Equity Method Investments, Fair Value Disclosure |
|
0
|
[1] |
0
|
[2] |
| Funds withheld at interest embedded derivatives |
|
0
|
[1] |
0
|
[2] |
| Funds Held Under Reinsurance Agreements, Asset Fair Value Disclosure |
|
0
|
[1] |
0
|
[2] |
| Cash and cash equivalents |
|
153
|
[1] |
0
|
[2] |
| Short-term investments |
|
89
|
[1] |
66
|
[2] |
| Derivative Assets (Liabilities), at Fair Value, Net |
|
211
|
[1] |
185
|
[2] |
| Investments, Fair Value Disclosure |
|
226
|
[1] |
202
|
[2] |
| Assets, Fair Value Disclosure |
|
93,675
|
[1] |
85,211
|
[2] |
| Liabilities Fair Value Disclosure |
|
|
|
|
|
| Fair Value Measured On Recurring Basis Guaranteed Interest Contracts Embedded Derivatives |
|
0
|
|
0
|
|
| Other liabilities |
|
(697)
|
|
(596)
|
|
| Financial Liabilities Fair Value Disclosure |
|
697
|
|
596
|
|
| Derivative Liability |
|
0
|
|
0
|
|
| Derivative Asset |
|
0
|
|
0
|
|
| Real Estate Investments Joint Ventures Fair Value Disclosure |
|
0
|
|
0
|
|
| Fair Value Inputs Level 2 Member | Fair Value Option Contractholder Directed Unit Linked Investments [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Investments, Fair Value Disclosure |
|
15
|
[1] |
17
|
[2] |
| Fair Value Inputs Level 2 Member | Corporate Debt Securities [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
66,269
|
[1] |
59,710
|
[2] |
| Fair Value Inputs Level 2 Member | Canadian and Canadian provincial governments |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
4,927
|
[1] |
5,100
|
[2] |
| Fair Value Inputs Level 2 Member | Residential mortgage-backed securities |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
3,630
|
[1] |
1,569
|
[2] |
| Fair Value Inputs Level 2 Member | Asset-backed Securities [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
2,435
|
[1] |
3,831
|
[2] |
| Fair Value Inputs Level 2 Member | Commercial Mortgage Backed Securities [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
1,844
|
[1] |
2,099
|
[2] |
| Fair Value Inputs Level 2 Member | US Treasury and Government [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
205
|
[1] |
209
|
[2] |
| Fair Value Inputs Level 2 Member | US States and Political Subdivisions Debt Securities [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
674
|
[1] |
660
|
[2] |
| Fair Value Inputs Level 2 Member | Debt Security, Government, Non-US [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
5,359
|
[1] |
5,752
|
[2] |
| Fair Value Inputs Level 2 Member | Japanese Government |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
6,807
|
[1] |
4,701
|
[2] |
| Fair Value Inputs Level 2 Member | Korean Government Debt Securities |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
[1] |
1,057
|
|
1,312
|
|
| Fair Value Inputs Level 3 Member |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
14,163
|
[1] |
13,752
|
[2] |
| Equity Method Investments, Fair Value Disclosure |
|
94
|
[1] |
98
|
[2] |
| Funds withheld at interest embedded derivatives |
|
(167)
|
[1] |
(128)
|
[2] |
| Funds Held Under Reinsurance Agreements, Asset Fair Value Disclosure |
|
61
|
[1] |
61
|
[2] |
| Cash and cash equivalents |
|
0
|
[1] |
0
|
[2] |
| Short-term investments |
|
29
|
[1] |
33
|
[2] |
| Derivative Assets (Liabilities), at Fair Value, Net |
|
0
|
[1] |
0
|
[2] |
| Investments, Fair Value Disclosure |
|
0
|
[1] |
0
|
[2] |
| Assets, Fair Value Disclosure |
|
14,225
|
[1] |
13,819
|
[2] |
| Liabilities Fair Value Disclosure |
|
|
|
|
|
| Fair Value Measured On Recurring Basis Guaranteed Interest Contracts Embedded Derivatives |
|
434
|
|
470
|
|
| Other liabilities |
|
(2)
|
|
(3)
|
|
| Financial Liabilities Fair Value Disclosure |
|
297
|
|
414
|
|
| Derivative Liability |
|
(139)
|
|
(59)
|
|
| Derivative Asset |
|
2
|
|
3
|
|
| Real Estate Investments Joint Ventures Fair Value Disclosure |
|
43
|
|
0
|
|
| Fair Value Inputs Level 3 Member | Fair Value Option Contractholder Directed Unit Linked Investments [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Investments, Fair Value Disclosure |
|
0
|
[1] |
0
|
[2] |
| Fair Value Inputs Level 3 Member | Corporate Debt Securities [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
10,558
|
[1] |
10,027
|
[2] |
| Fair Value Inputs Level 3 Member | Canadian and Canadian provincial governments |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
0
|
[1] |
0
|
[2] |
| Fair Value Inputs Level 3 Member | Residential mortgage-backed securities |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
3,430
|
[1] |
0
|
[2] |
| Fair Value Inputs Level 3 Member | Asset-backed Securities [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
43
|
[1] |
3,538
|
[2] |
| Fair Value Inputs Level 3 Member | Commercial Mortgage Backed Securities [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
0
|
[1] |
63
|
[2] |
| Fair Value Inputs Level 3 Member | US Treasury and Government [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
3
|
[1] |
4
|
[2] |
| Fair Value Inputs Level 3 Member | US States and Political Subdivisions Debt Securities [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
0
|
[1] |
0
|
[2] |
| Fair Value Inputs Level 3 Member | Debt Security, Government, Non-US [Member] |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
129
|
[1] |
120
|
[2] |
| Fair Value Inputs Level 3 Member | Japanese Government |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
|
0
|
[1] |
0
|
[2] |
| Fair Value Inputs Level 3 Member | Korean Government Debt Securities |
|
|
|
|
|
| Assets Fair Value Disclosure |
|
|
|
|
|
| Fixed maturity securities, available-for-sale |
[1] |
$ 0
|
|
$ 0
|
|
|
|