v3.26.1
Investments - Schedule of Investment in CMLs by Loan to Value and Debt Service Coverage Ratios (Details) - Commercial Mortgage - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Schedule of Investments [Line Items]    
Loans $ 3,710 $ 3,260
% of Total 100.00% 100.00%
Credit Quality Indicator Current Year [Abstract]    
Year one $ 532 $ 646
Year two 605 295
Year three 290 194
Year four 196 292
Year five 292 1,252
Prior 1,795 581
Total 3,710 3,260
Credit Quality Indicator Prior Year [Abstract]    
Year one 532 646
Year two 605 295
Year three 290 194
Year four 196 292
Year five 292 1,252
Prior 1,795 581
Total 3,710 3,260
Fair Value    
Schedule of Investments [Line Items]    
Loans $ 3,440 $ 3,025
% of Total 100.00% 100.00%
Credit Quality Indicator Current Year [Abstract]    
Total $ 3,440 $ 3,025
Credit Quality Indicator Prior Year [Abstract]    
Total 3,440 3,025
Less than 50.00%    
Schedule of Investments [Line Items]    
Loans $ 843 $ 610
% of Total 23.00% 19.00%
Credit Quality Indicator Current Year [Abstract]    
Year one $ 196 $ 148
Year two 147 49
Year three 85 66
Year four 67 21
Year five 21 75
Prior 327 251
Total 843 610
Credit Quality Indicator Prior Year [Abstract]    
Year one 196 148
Year two 147 49
Year three 85 66
Year four 67 21
Year five 21 75
Prior 327 251
Total 843 610
Less than 50.00% | Fair Value    
Schedule of Investments [Line Items]    
Loans $ 823 $ 596
% of Total 24.00% 19.00%
Credit Quality Indicator Current Year [Abstract]    
Total $ 823 $ 596
Credit Quality Indicator Prior Year [Abstract]    
Total 823 596
50.00% to 59.99%    
Schedule of Investments [Line Items]    
Loans $ 1,090 $ 923
% of Total 29.00% 28.00%
Credit Quality Indicator Current Year [Abstract]    
Year one $ 158 $ 157
Year two 156 36
Year three 50 53
Year four 53 149
Year five 149 320
Prior 524 208
Total 1,090 923
Credit Quality Indicator Prior Year [Abstract]    
Year one 158 157
Year two 156 36
Year three 50 53
Year four 53 149
Year five 149 320
Prior 524 208
Total 1,090 923
50.00% to 59.99% | Fair Value    
Schedule of Investments [Line Items]    
Loans $ 1,009 $ 852
% of Total 29.00% 28.00%
Credit Quality Indicator Current Year [Abstract]    
Total $ 1,009 $ 852
Credit Quality Indicator Prior Year [Abstract]    
Total 1,009 852
60.00% to 74.99%    
Schedule of Investments [Line Items]    
Loans $ 1,747 $ 1,709
% of Total 47.00% 52.00%
Credit Quality Indicator Current Year [Abstract]    
Year one $ 166 $ 341
Year two 302 206
Year three 151 70
Year four 71 113
Year five 113 857
Prior 944 122
Total 1,747 1,709
Credit Quality Indicator Prior Year [Abstract]    
Year one 166 341
Year two 302 206
Year three 151 70
Year four 71 113
Year five 113 857
Prior 944 122
Total 1,747 1,709
60.00% to 74.99% | Fair Value    
Schedule of Investments [Line Items]    
Loans $ 1,582 $ 1,560
% of Total 46.00% 52.00%
Credit Quality Indicator Current Year [Abstract]    
Total $ 1,582 $ 1,560
Credit Quality Indicator Prior Year [Abstract]    
Total 1,582 1,560
75.00% to 84.99%    
Schedule of Investments [Line Items]    
Loans $ 30 $ 18
% of Total 1.00% 1.00%
Credit Quality Indicator Current Year [Abstract]    
Year one $ 12 $ 0
Year two 0 4
Year three 4 5
Year four 5 9
Year five 9 0
Prior 0 0
Total 30 18
Credit Quality Indicator Prior Year [Abstract]    
Year one 12 0
Year two 0 4
Year three 4 5
Year four 5 9
Year five 9 0
Prior 0 0
Total 30 18
75.00% to 84.99% | Fair Value    
Schedule of Investments [Line Items]    
Loans $ 26 $ 17
% of Total 1.00% 1.00%
Credit Quality Indicator Current Year [Abstract]    
Total $ 26 $ 17
Credit Quality Indicator Prior Year [Abstract]    
Total 26 17
Greater than 1.25    
Schedule of Investments [Line Items]    
Loans 3,073 2,859
Credit Quality Indicator Current Year [Abstract]    
Year one 290 469
Year two 429 140
Year three 140 182
Year four 183 283
Year five 284 1,240
Prior 1,747 545
Total 3,073 2,859
Credit Quality Indicator Prior Year [Abstract]    
Year one 290 469
Year two 429 140
Year three 140 182
Year four 183 283
Year five 284 1,240
Prior 1,747 545
Total 3,073 2,859
Greater than 1.25 | Less than 50.00%    
Schedule of Investments [Line Items]    
Loans 803 594
Credit Quality Indicator Current Year [Abstract]    
Total 803 594
Credit Quality Indicator Prior Year [Abstract]    
Total 803 594
Greater than 1.25 | 50.00% to 59.99%    
Schedule of Investments [Line Items]    
Loans 908 850
Credit Quality Indicator Current Year [Abstract]    
Total 908 850
Credit Quality Indicator Prior Year [Abstract]    
Total 908 850
Greater than 1.25 | 60.00% to 74.99%    
Schedule of Investments [Line Items]    
Loans 1,355 1,415
Credit Quality Indicator Current Year [Abstract]    
Total 1,355 1,415
Credit Quality Indicator Prior Year [Abstract]    
Total 1,355 1,415
Greater than 1.25 | 75.00% to 84.99%    
Schedule of Investments [Line Items]    
Loans 7 0
Credit Quality Indicator Current Year [Abstract]    
Total 7 0
Credit Quality Indicator Prior Year [Abstract]    
Total 7 0
Greater than 1.00 but less than 1.25    
Schedule of Investments [Line Items]    
Loans 468 349
Credit Quality Indicator Current Year [Abstract]    
Year one 136 169
Year two 169 155
Year three 150 12
Year four 13 0
Year five 0 0
Prior 0 13
Total 468 349
Credit Quality Indicator Prior Year [Abstract]    
Year one 136 169
Year two 169 155
Year three 150 12
Year four 13 0
Year five 0 0
Prior 0 13
Total 468 349
Greater than 1.00 but less than 1.25 | Less than 50.00%    
Schedule of Investments [Line Items]    
Loans 40 16
Credit Quality Indicator Current Year [Abstract]    
Total 40 16
Credit Quality Indicator Prior Year [Abstract]    
Total 40 16
Greater than 1.00 but less than 1.25 | 50.00% to 59.99%    
Schedule of Investments [Line Items]    
Loans 135 36
Credit Quality Indicator Current Year [Abstract]    
Total 135 36
Credit Quality Indicator Prior Year [Abstract]    
Total 135 36
Greater than 1.00 but less than 1.25 | 60.00% to 74.99%    
Schedule of Investments [Line Items]    
Loans 279 288
Credit Quality Indicator Current Year [Abstract]    
Total 279 288
Credit Quality Indicator Prior Year [Abstract]    
Total 279 288
Greater than 1.00 but less than 1.25 | 75.00% to 84.99%    
Schedule of Investments [Line Items]    
Loans 14 9
Credit Quality Indicator Current Year [Abstract]    
Total 14 9
Credit Quality Indicator Prior Year [Abstract]    
Total 14 9
Less than 1.00    
Schedule of Investments [Line Items]    
Loans 169 52
Credit Quality Indicator Current Year [Abstract]    
Year one 106 8
Year two 7 0
Year three 0 0
Year four 0 9
Year five 8 12
Prior 48 23
Total 169 52
Credit Quality Indicator Prior Year [Abstract]    
Year one 106 8
Year two 7 0
Year three 0 0
Year four 0 9
Year five 8 12
Prior 48 23
Total 169 52
Less than 1.00 | Less than 50.00%    
Schedule of Investments [Line Items]    
Loans 0 0
Credit Quality Indicator Current Year [Abstract]    
Total 0 0
Credit Quality Indicator Prior Year [Abstract]    
Total 0 0
Less than 1.00 | 50.00% to 59.99%    
Schedule of Investments [Line Items]    
Loans 47 37
Credit Quality Indicator Current Year [Abstract]    
Total 47 37
Credit Quality Indicator Prior Year [Abstract]    
Total 47 37
Less than 1.00 | 60.00% to 74.99%    
Schedule of Investments [Line Items]    
Loans 113 6
Credit Quality Indicator Current Year [Abstract]    
Total 113 6
Credit Quality Indicator Prior Year [Abstract]    
Total 113 6
Less than 1.00 | 75.00% to 84.99%    
Schedule of Investments [Line Items]    
Loans 9 9
Credit Quality Indicator Current Year [Abstract]    
Total 9 9
Credit Quality Indicator Prior Year [Abstract]    
Total $ 9 $ 9