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Policyholder Account Balances (Summary of Policyholder Account Balances by Ranges) (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Dec. 31, 2021
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 117,156 $ 113,972  
4.01% and Above [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 4.01%    
UL and Other [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 37,042 37,258 $ 37,719
UL and Other [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 27,152 27,776  
UL and Other [Member] | 1-50 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 10 156  
UL and Other [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 352 195  
UL and Other [Member] | 101-150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 46 29  
UL and Other [Member] | Greater Then 150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3,647 3,574  
UL and Other [Member] | Minimum Crediting Rate Up to 1.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 1,059 $ 833  
Minimum Crediting Rate 1.00% 1.00%  
UL and Other [Member] | Minimum Crediting Rate Up to 1.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 302 $ 318  
UL and Other [Member] | Minimum Crediting Rate Up to 1.00% [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 206 194  
UL and Other [Member] | Minimum Crediting Rate Up to 1.00% [Member] | 101-150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 46 29  
UL and Other [Member] | Minimum Crediting Rate Up to 1.00% [Member] | Greater Then 150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 505 292  
UL and Other [Member] | 1.01% to 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3,705 3,840  
UL and Other [Member] | 1.01% to 2.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 557 558  
UL and Other [Member] | 1.01% to 2.00% [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 6    
UL and Other [Member] | 1.01% to 2.00% [Member] | Greater Then 150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3,142 3,282  
UL and Other [Member] | 2.01% to 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 7,366 7,374  
UL and Other [Member] | 2.01% to 3.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 7,217 7,218  
UL and Other [Member] | 2.01% to 3.00% [Member] | 1-50 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 10 156  
UL and Other [Member] | 2.01% to 3.00% [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 139    
UL and Other [Member] | 3.01% to 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 15,270 15,859  
UL and Other [Member] | 3.01% to 4.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 15,269 15,858  
UL and Other [Member] | 3.01% to 4.00% [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1 1  
UL and Other [Member] | 4.01% and Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 3,807 $ 3,824  
Minimum Crediting Rate 4.01% 4.01%  
UL and Other [Member] | 4.01% and Above [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 3,807 $ 3,824  
UL and Other [Member] | Minimum Crediting Rate Other [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 5,835 $ 5,528  
UL and Other [Member] | Minimum [Member] | 1.01% to 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 1.01% 1.01%  
UL and Other [Member] | Minimum [Member] | 2.01% to 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 2.01% 2.01%  
UL and Other [Member] | Minimum [Member] | 3.01% to 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 3.01% 3.01%  
UL and Other [Member] | Maximum [Member] | 1.01% to 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 2.00% 2.00%  
UL and Other [Member] | Maximum [Member] | 2.01% to 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 3.00% 3.00%  
UL and Other [Member] | Maximum [Member] | 3.01% to 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 4.00% 4.00%  
Variable Annuities [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 26,257 $ 22,184 19,148
Variable Annuities [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2,103 2,218  
Variable Annuities [Member] | 101-150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances   $ 8  
Variable Annuities [Member] | Greater Then 150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 8    
Variable Annuities [Member] | Minimum Crediting Rate Up to 1.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 1.00% 1.00%  
Variable Annuities [Member] | 1.01% to 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 12 $ 12  
Variable Annuities [Member] | 1.01% to 2.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 4 4  
Variable Annuities [Member] | 1.01% to 2.00% [Member] | 101-150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances   8  
Variable Annuities [Member] | 1.01% to 2.00% [Member] | Greater Then 150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 8    
Variable Annuities [Member] | 2.01% to 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 619 658  
Variable Annuities [Member] | 2.01% to 3.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 619 658  
Variable Annuities [Member] | 3.01% to 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,470 1,545  
Variable Annuities [Member] | 3.01% to 4.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,470 1,545  
Variable Annuities [Member] | 4.01% and Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 10 $ 11  
Minimum Crediting Rate   4.01%  
Variable Annuities [Member] | 4.01% and Above [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 10 $ 11  
Variable Annuities [Member] | Minimum Crediting Rate Other [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 24,146 $ 19,958  
Variable Annuities [Member] | Minimum [Member] | 1.01% to 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 1.01% 1.01%  
Variable Annuities [Member] | Minimum [Member] | 2.01% to 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 2.01% 2.01%  
Variable Annuities [Member] | Minimum [Member] | 3.01% to 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 3.01% 3.01%  
Variable Annuities [Member] | Maximum [Member] | 1.01% to 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 2.00% 2.00%  
Variable Annuities [Member] | Maximum [Member] | 2.01% to 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 3.00% 3.00%  
Variable Annuities [Member] | Maximum [Member] | 3.01% to 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 4.00% 4.00%  
Fixed Annuities [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 23,786 $ 23,338 22,522
Fixed Annuities [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 4,434 4,927  
Fixed Annuities [Member] | 1-50 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 550 646  
Fixed Annuities [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 715 769  
Fixed Annuities [Member] | 101-150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 965 1,055  
Fixed Annuities [Member] | Greater Then 150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3,379 2,386  
Fixed Annuities [Member] | Minimum Crediting Rate Up to 1.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 4,448 $ 3,869  
Minimum Crediting Rate 1.00% 1.00%  
Fixed Annuities [Member] | Minimum Crediting Rate Up to 1.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 756 $ 891  
Fixed Annuities [Member] | Minimum Crediting Rate Up to 1.00% [Member] | 1-50 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 414 497  
Fixed Annuities [Member] | Minimum Crediting Rate Up to 1.00% [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 515 589  
Fixed Annuities [Member] | Minimum Crediting Rate Up to 1.00% [Member] | 101-150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 467 563  
Fixed Annuities [Member] | Minimum Crediting Rate Up to 1.00% [Member] | Greater Then 150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2,296 1,329  
Fixed Annuities [Member] | 1.01% to 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2,485 2,416  
Fixed Annuities [Member] | 1.01% to 2.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 577 544  
Fixed Annuities [Member] | 1.01% to 2.00% [Member] | 1-50 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 133 144  
Fixed Annuities [Member] | 1.01% to 2.00% [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 194 179  
Fixed Annuities [Member] | 1.01% to 2.00% [Member] | 101-150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 498 492  
Fixed Annuities [Member] | 1.01% to 2.00% [Member] | Greater Then 150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,083 1,057  
Fixed Annuities [Member] | 2.01% to 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,755 1,979  
Fixed Annuities [Member] | 2.01% to 3.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,746 1,973  
Fixed Annuities [Member] | 2.01% to 3.00% [Member] | 1-50 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3 5  
Fixed Annuities [Member] | 2.01% to 3.00% [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 6 1  
Fixed Annuities [Member] | 3.01% to 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,171 1,326  
Fixed Annuities [Member] | 3.01% to 4.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,171 1,326  
Fixed Annuities [Member] | 4.01% and Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 184 $ 193  
Minimum Crediting Rate 4.01% 4.01%  
Fixed Annuities [Member] | 4.01% and Above [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 184 $ 193  
Fixed Annuities [Member] | Minimum Crediting Rate Other [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 13,743 $ 13,555  
Fixed Annuities [Member] | Minimum [Member] | 1.01% to 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 1.01% 1.01%  
Fixed Annuities [Member] | Minimum [Member] | 2.01% to 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 2.01% 2.01%  
Fixed Annuities [Member] | Minimum [Member] | 3.01% to 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 3.01% 3.01%  
Fixed Annuities [Member] | Maximum [Member] | 1.01% to 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 2.00% 2.00%  
Fixed Annuities [Member] | Maximum [Member] | 2.01% to 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 3.00% 3.00%  
Fixed Annuities [Member] | Maximum [Member] | 3.01% to 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 4.00% 4.00%  
Retirement Plan Services Segment [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 24,430 $ 25,138 $ 23,579
Retirement Plan Services Segment [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 10,880 12,579  
Retirement Plan Services Segment [Member] | 1-50 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3,628 3,200  
Retirement Plan Services Segment [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 4,276 5,286  
Retirement Plan Services Segment [Member] | 101-150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3,224 2,165  
Retirement Plan Services Segment [Member] | Greater Then 150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2,422 1,908  
Retirement Plan Services Segment [Member] | Minimum Crediting Rate Up to 1.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 9,554 $ 9,877  
Minimum Crediting Rate 1.00% 1.00%  
Retirement Plan Services Segment [Member] | Minimum Crediting Rate Up to 1.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 601 $ 961  
Retirement Plan Services Segment [Member] | Minimum Crediting Rate Up to 1.00% [Member] | 1-50 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 746 1,001  
Retirement Plan Services Segment [Member] | Minimum Crediting Rate Up to 1.00% [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3,092 4,304  
Retirement Plan Services Segment [Member] | Minimum Crediting Rate Up to 1.00% [Member] | 101-150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2,693 1,703  
Retirement Plan Services Segment [Member] | Minimum Crediting Rate Up to 1.00% [Member] | Greater Then 150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2,422 1,908  
Retirement Plan Services Segment [Member] | 1.01% to 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 5,232 5,415  
Retirement Plan Services Segment [Member] | 1.01% to 2.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 637 1,774  
Retirement Plan Services Segment [Member] | 1.01% to 2.00% [Member] | 1-50 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2,880 2,197  
Retirement Plan Services Segment [Member] | 1.01% to 2.00% [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,184 982  
Retirement Plan Services Segment [Member] | 1.01% to 2.00% [Member] | 101-150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 531 462  
Retirement Plan Services Segment [Member] | 2.01% to 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2,648 2,712  
Retirement Plan Services Segment [Member] | 2.01% to 3.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2,647 2,711  
Retirement Plan Services Segment [Member] | 2.01% to 3.00% [Member] | 1-50 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1 1  
Retirement Plan Services Segment [Member] | 3.01% to 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 5,350 5,623  
Retirement Plan Services Segment [Member] | 3.01% to 4.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 5,349 5,622  
Retirement Plan Services Segment [Member] | 3.01% to 4.00% [Member] | 1-50 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1 1  
Retirement Plan Services Segment [Member] | 4.01% and Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 1,646 $ 1,511  
Minimum Crediting Rate 4.01% 4.01%  
Retirement Plan Services Segment [Member] | 4.01% and Above [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 1,646 $ 1,511  
Retirement Plan Services Segment [Member] | Minimum [Member] | 1.01% to 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 1.01% 1.01%  
Retirement Plan Services Segment [Member] | Minimum [Member] | 2.01% to 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 2.01% 2.01%  
Retirement Plan Services Segment [Member] | Minimum [Member] | 3.01% to 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 3.01% 3.01%  
Retirement Plan Services Segment [Member] | Maximum [Member] | 1.01% to 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 2.00% 2.00%  
Retirement Plan Services Segment [Member] | Maximum [Member] | 2.01% to 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 3.00% 3.00%  
Retirement Plan Services Segment [Member] | Maximum [Member] | 3.01% to 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Minimum Crediting Rate 4.00% 4.00%