v3.26.3
Investments - Schedule of Investment in CMLs by Loan to Value and Debt Service Coverage Ratios (Details) - Commercial Mortgages - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Schedule of Investments    
Loans $ 3,829 $ 3,260
% of Total 100.00% 100.00%
Credit Quality Indicator Current Year    
Year one $ 683 $ 646
Year two 591 295
Year three 274 194
Year four 195 292
Year five 292 1,252
Prior 1,794 581
Total 3,829 3,260
Credit Quality Indicator Prior Year [Abstract]    
Year one 683 646
Year two 591 295
Year three 274 194
Year four 195 292
Year five 292 1,252
Prior 1,794 581
Total 3,829 3,260
Fair Value    
Schedule of Investments    
Loans $ 3,473 $ 3,025
% of Total 100.00% 100.00%
Credit Quality Indicator Current Year    
Total $ 3,473 $ 3,025
Credit Quality Indicator Prior Year [Abstract]    
Total 3,473 3,025
Less than 50.00%    
Schedule of Investments    
Loans $ 772 $ 610
% of Total 20.00% 19.00%
Credit Quality Indicator Current Year    
Year one $ 158 $ 148
Year two 135 49
Year three 62 66
Year four 67 21
Year five 21 75
Prior 329 251
Total 772 610
Credit Quality Indicator Prior Year [Abstract]    
Year one 158 148
Year two 135 49
Year three 62 66
Year four 67 21
Year five 21 75
Prior 329 251
Total 772 610
Less than 50.00% | Fair Value    
Schedule of Investments    
Loans $ 740 $ 596
% of Total 21.00% 19.00%
Credit Quality Indicator Current Year    
Total $ 740 $ 596
Credit Quality Indicator Prior Year [Abstract]    
Total 740 596
50.00% to 59.99%    
Schedule of Investments    
Loans $ 1,135 $ 923
% of Total 30.00% 28.00%
Credit Quality Indicator Current Year    
Year one $ 209 $ 157
Year two 181 36
Year three 0 53
Year four 40 149
Year five 149 320
Prior 556 208
Total 1,135 923
Credit Quality Indicator Prior Year [Abstract]    
Year one 209 157
Year two 181 36
Year three 0 53
Year four 40 149
Year five 149 320
Prior 556 208
Total 1,135 923
50.00% to 59.99% | Fair Value    
Schedule of Investments    
Loans $ 1,029 $ 852
% of Total 30.00% 28.00%
Credit Quality Indicator Current Year    
Total $ 1,029 $ 852
Credit Quality Indicator Prior Year [Abstract]    
Total 1,029 852
60.00% to 74.99%    
Schedule of Investments    
Loans $ 1,899 $ 1,709
% of Total 49.00% 52.00%
Credit Quality Indicator Current Year    
Year one $ 310 $ 341
Year two 275 206
Year three 208 70
Year four 84 113
Year five 113 857
Prior 909 122
Total 1,899 1,709
Credit Quality Indicator Prior Year [Abstract]    
Year one 310 341
Year two 275 206
Year three 208 70
Year four 84 113
Year five 113 857
Prior 909 122
Total 1,899 1,709
60.00% to 74.99% | Fair Value    
Schedule of Investments    
Loans $ 1,683 $ 1,560
% of Total 48.00% 52.00%
Credit Quality Indicator Current Year    
Total $ 1,683 $ 1,560
Credit Quality Indicator Prior Year [Abstract]    
Total 1,683 1,560
75.00% to 84.99%    
Schedule of Investments    
Loans $ 23 $ 18
% of Total 1.00% 1.00%
Credit Quality Indicator Current Year    
Year one $ 6 $ 0
Year two 0 4
Year three 4 5
Year four 4 9
Year five 9 0
Prior 0 0
Total 23 18
Credit Quality Indicator Prior Year [Abstract]    
Year one 6 0
Year two 0 4
Year three 4 5
Year four 4 9
Year five 9 0
Prior 0 0
Total 23 18
75.00% to 84.99% | Fair Value    
Schedule of Investments    
Loans $ 21 $ 17
% of Total 1.00% 1.00%
Credit Quality Indicator Current Year    
Total $ 21 $ 17
Credit Quality Indicator Prior Year [Abstract]    
Total 21 17
Greater than 1.25    
Schedule of Investments    
Loans 3,006 2,859
Credit Quality Indicator Current Year    
Year one 289 469
Year two 416 140
Year three 118 182
Year four 153 283
Year five 283 1,240
Prior 1,747 545
Total 3,006 2,859
Credit Quality Indicator Prior Year [Abstract]    
Year one 289 469
Year two 416 140
Year three 118 182
Year four 153 283
Year five 283 1,240
Prior 1,747 545
Total 3,006 2,859
Greater than 1.25 | Less than 50.00%    
Schedule of Investments    
Loans 742 594
Credit Quality Indicator Current Year    
Total 742 594
Credit Quality Indicator Prior Year [Abstract]    
Total 742 594
Greater than 1.25 | 50.00% to 59.99%    
Schedule of Investments    
Loans 990 850
Credit Quality Indicator Current Year    
Total 990 850
Credit Quality Indicator Prior Year [Abstract]    
Total 990 850
Greater than 1.25 | 60.00% to 74.99%    
Schedule of Investments    
Loans 1,274 1,415
Credit Quality Indicator Current Year    
Total 1,274 1,415
Credit Quality Indicator Prior Year [Abstract]    
Total 1,274 1,415
Greater than 1.25 | 75.00% to 84.99%    
Schedule of Investments    
Loans 0 0
Credit Quality Indicator Current Year    
Total 0 0
Credit Quality Indicator Prior Year [Abstract]    
Total 0 0
Greater than 1.00 but less than 1.25    
Schedule of Investments    
Loans 603 349
Credit Quality Indicator Current Year    
Year one 236 169
Year two 169 155
Year three 156 12
Year four 42 0
Year five 0 0
Prior 0 13
Total 603 349
Credit Quality Indicator Prior Year [Abstract]    
Year one 236 169
Year two 169 155
Year three 156 12
Year four 42 0
Year five 0 0
Prior 0 13
Total 603 349
Greater than 1.00 but less than 1.25 | Less than 50.00%    
Schedule of Investments    
Loans 30 16
Credit Quality Indicator Current Year    
Total 30 16
Credit Quality Indicator Prior Year [Abstract]    
Total 30 16
Greater than 1.00 but less than 1.25 | 50.00% to 59.99%    
Schedule of Investments    
Loans 98 36
Credit Quality Indicator Current Year    
Total 98 36
Credit Quality Indicator Prior Year [Abstract]    
Total 98 36
Greater than 1.00 but less than 1.25 | 60.00% to 74.99%    
Schedule of Investments    
Loans 461 288
Credit Quality Indicator Current Year    
Total 461 288
Credit Quality Indicator Prior Year [Abstract]    
Total 461 288
Greater than 1.00 but less than 1.25 | 75.00% to 84.99%    
Schedule of Investments    
Loans 14 9
Credit Quality Indicator Current Year    
Total 14 9
Credit Quality Indicator Prior Year [Abstract]    
Total 14 9
Less than 1.00    
Schedule of Investments    
Loans 220 52
Credit Quality Indicator Current Year    
Year one 158 8
Year two 6 0
Year three 0 0
Year four 0 9
Year five 9 12
Prior 47 23
Total 220 52
Credit Quality Indicator Prior Year [Abstract]    
Year one 158 8
Year two 6 0
Year three 0 0
Year four 0 9
Year five 9 12
Prior 47 23
Total 220 52
Less than 1.00 | Less than 50.00%    
Schedule of Investments    
Loans 0 0
Credit Quality Indicator Current Year    
Total 0 0
Credit Quality Indicator Prior Year [Abstract]    
Total 0 0
Less than 1.00 | 50.00% to 59.99%    
Schedule of Investments    
Loans 47 37
Credit Quality Indicator Current Year    
Total 47 37
Credit Quality Indicator Prior Year [Abstract]    
Total 47 37
Less than 1.00 | 60.00% to 74.99%    
Schedule of Investments    
Loans 164 6
Credit Quality Indicator Current Year    
Total 164 6
Credit Quality Indicator Prior Year [Abstract]    
Total 164 6
Less than 1.00 | 75.00% to 84.99%    
Schedule of Investments    
Loans 9 9
Credit Quality Indicator Current Year    
Total 9 9
Credit Quality Indicator Prior Year [Abstract]    
Total $ 9 $ 9