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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 $ 117,598 $ 114,435  
UL and Other [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 37,458 37,694 $ 38,200
UL and Other [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 27,556 28,200  
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  
Guaranteed Minimum Credit Rating 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] | Minimum Crediting Rate 1.01% - 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3,705 3,840  
UL and Other [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 557 558  
UL and Other [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 6    
UL and Other [Member] | Minimum Crediting Rate 1.01% - 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] | Minimum Crediting Rate 2.01% - 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 7,366 7,374  
UL and Other [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 7,217 7,218  
UL and Other [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member] | 1-50 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 10 156  
UL and Other [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 139    
UL and Other [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 15,674 16,283  
UL and Other [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 15,673 16,282  
UL and Other [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1 1  
UL and Other [Member] | Minimum Crediting Rate 4.01% and above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 3,807 $ 3,824  
Guaranteed Minimum Credit Rating 4.01% 4.01%  
UL and Other [Member] | Minimum Crediting Rate 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 $ 5,847 $ 5,540  
UL and Other [Member] | Minimum [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 1.01% 1.01%  
UL and Other [Member] | Minimum [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 2.01% 2.01%  
UL and Other [Member] | Minimum [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 3.01% 3.01%  
UL and Other [Member] | Maximum [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 2.00% 2.00%  
UL and Other [Member] | Maximum [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 3.00% 3.00%  
UL and Other [Member] | Maximum [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 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]      
Guaranteed Minimum Credit Rating 1.00% 1.00%  
Variable Annuities [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 12 $ 12  
Variable Annuities [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 4 4  
Variable Annuities [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member] | 101-150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances   8  
Variable Annuities [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member] | Greater Then 150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 8    
Variable Annuities [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 619 658  
Variable Annuities [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 619 658  
Variable Annuities [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,470 1,545  
Variable Annuities [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,470 1,545  
Variable Annuities [Member] | Minimum Crediting Rate 4.01% and above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 10 $ 11  
Guaranteed Minimum Credit Rating 4.01% 4.01%  
Variable Annuities [Member] | Minimum Crediting Rate 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] | Minimum Crediting Rate 1.01% - 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 1.01% 1.01%  
Variable Annuities [Member] | Minimum [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating   2.01%  
Variable Annuities [Member] | Minimum [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 2.01%    
Variable Annuities [Member] | Minimum [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 3.01% 3.01%  
Variable Annuities [Member] | Maximum [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 2.00% 2.00%  
Variable Annuities [Member] | Maximum [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating   3.00%  
Variable Annuities [Member] | Maximum [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 3.00%    
Variable Annuities [Member] | Maximum [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating   4.00%  
Variable Annuities [Member] | Maximum [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 4.00%    
Fixed Annuities [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 23,813 $ 23,365 22,552
Fixed Annuities [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 4,335 4,954  
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  
Guaranteed Minimum Credit Rating 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] | Minimum Crediting Rate 1.01% - 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2,485 2,416  
Fixed Annuities [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 577 544  
Fixed Annuities [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member] | 1-50 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 133 144  
Fixed Annuities [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 194 179  
Fixed Annuities [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member] | 101-150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 498 492  
Fixed Annuities [Member] | Minimum Crediting Rate 1.01% - 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] | Minimum Crediting Rate 2.01% - 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,755 1,979  
Fixed Annuities [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,746 1,973  
Fixed Annuities [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member] | 1-50 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3 5  
Fixed Annuities [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 6 1  
Fixed Annuities [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,072 1,353  
Fixed Annuities [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,072 1,353  
Fixed Annuities [Member] | Minimum Crediting Rate 4.01% and above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 184 $ 193  
Guaranteed Minimum Credit Rating 4.01% 4.01%  
Fixed Annuities [Member] | Minimum Crediting Rate 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 $ 13,869 $ 13,555  
Fixed Annuities [Member] | Minimum [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 1.01% 1.01%  
Fixed Annuities [Member] | Minimum [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 2.01% 2.01%  
Fixed Annuities [Member] | Minimum [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 3.01% 3.01%  
Fixed Annuities [Member] | Maximum [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 2.00% 2.00%  
Fixed Annuities [Member] | Maximum [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 3.00% 3.00%  
Fixed Annuities [Member] | Maximum [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 4.00% 4.00%  
Retirement Plan Services [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 24,430 $ 25,138 $ 23,579
Retirement Plan Services [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 10,880 12,579  
Retirement Plan Services [Member] | 1-50 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3,628 3,200  
Retirement Plan Services [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 4,276 5,286  
Retirement Plan Services [Member] | 101-150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3,224 2,165  
Retirement Plan Services [Member] | Greater Then 150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2,422 1,908  
Retirement Plan Services [Member] | Minimum Crediting Rate Up to 1.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 9,554 $ 9,877  
Guaranteed Minimum Credit Rating 1.00% 1.00%  
Retirement Plan Services [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 [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 [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 [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 [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 [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 5,232 5,415  
Retirement Plan Services [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 637 1,774  
Retirement Plan Services [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member] | 1-50 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2,880 2,197  
Retirement Plan Services [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,184 982  
Retirement Plan Services [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member] | 101-150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 531 462  
Retirement Plan Services [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2,648 2,712  
Retirement Plan Services [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2,647 2,711  
Retirement Plan Services [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member] | 1-50 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1 1  
Retirement Plan Services [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 5,350 5,623  
Retirement Plan Services [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 5,349 5,622  
Retirement Plan Services [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member] | 1-50 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1 1  
Retirement Plan Services [Member] | Minimum Crediting Rate 4.01% and above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 1,646 $ 1,511  
Guaranteed Minimum Credit Rating 4.01% 4.01%  
Retirement Plan Services [Member] | Minimum Crediting Rate 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 [Member] | Minimum [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 1.01% 1.01%  
Retirement Plan Services [Member] | Minimum [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 2.01% 2.01%  
Retirement Plan Services [Member] | Minimum [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 3.01% 3.01%  
Retirement Plan Services [Member] | Maximum [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 2.00% 2.00%  
Retirement Plan Services [Member] | Maximum [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 3.00% 3.00%  
Retirement Plan Services [Member] | Maximum [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Guaranteed Minimum Credit Rating 4.00% 4.00%