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Policyholder Account Balances (Summary of Policyholder Account Balances by Ranges) (Details) - USD ($)
$ in Millions
Mar. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 116,167 $ 114,435  
UL and Other [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 37,533 37,694 $ 38,200
UL and Other [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 27,872 28,200  
UL and Other [Member] | 1-50 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 158 156  
UL and Other [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 203 195  
UL and Other [Member] | 101-150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 26 29  
UL and Other [Member] | Greater Then 150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3,577 3,574  
UL and Other [Member] | Minimum Crediting Rate Up to 1.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 888 $ 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 $ 312 $ 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 202 194  
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 26 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 348 292  
UL and Other [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3,785 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 556 558  
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 3,229 3,282  
UL and Other [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 7,288 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 7,130 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 158 156  
UL and Other [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 16,108 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 16,107 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 $ 3,767 $ 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 $ 3,767 $ 3,824  
UL and Other [Member] | Minimum Crediting Rate Other [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 5,697 $ 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 $ 23,771 $ 22,184 19,148
Variable Annuities [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2,151 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 634 658  
Variable Annuities [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 634 658  
Variable Annuities [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,503 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 1,503 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 $ 21,612 $ 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 $ 24,019 $ 23,365 22,552
Fixed Annuities [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 4,941 4,946  
Fixed Annuities [Member] | 1-50 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 594 649  
Fixed Annuities [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 764 772  
Fixed Annuities [Member] | 101-150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 941 1,055  
Fixed Annuities [Member] | Greater Then 150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2,856 2,388  
Fixed Annuities [Member] | Minimum Crediting Rate Up to 1.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 4,077 $ 3,870  
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 $ 831 $ 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 447 497  
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 578 589  
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 448 563  
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 1,773 1,330  
Fixed Annuities [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2,460 2,422  
Fixed Annuities [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 559 546  
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 141 145  
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 184 181  
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 493 492  
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 1,058  
Fixed Annuities [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,893 2,005  
Fixed Annuities [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,885 1,996  
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 6 7  
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 2 2  
Fixed Annuities [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,473 1,320  
Fixed Annuities [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 1,473 1,320  
Fixed Annuities [Member] | Minimum Crediting Rate 4.01% and above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 193 $ 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 $ 193 $ 193  
Fixed Annuities [Member] | Minimum Crediting Rate Other [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 13,923 $ 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 $ 24,994 $ 25,138 $ 23,579
Retirement Plan Services [Member] | Guaranteed Minimum Crediting Rate [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 11,705 12,579  
Retirement Plan Services [Member] | 1-50 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3,380 3,200  
Retirement Plan Services [Member] | 51-100 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 4,258 5,286  
Retirement Plan Services [Member] | 101-150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3,438 2,165  
Retirement Plan Services [Member] | Greater Then 150 Basis Points Above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 2,213 1,908  
Retirement Plan Services [Member] | Minimum Crediting Rate Up to 1.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 9,532 $ 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 $ 595 $ 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 751 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 3,062 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 2,911 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 2,213 1,908  
Retirement Plan Services [Member] | Minimum Crediting Rate 1.01% - 2.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 5,329 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 977 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 2,629 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 1,196 982  
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 527 462  
Retirement Plan Services [Member] | Minimum Crediting Rate 2.01% - 3.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 3,093 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 3,093 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  
Retirement Plan Services [Member] | Minimum Crediting Rate 3.01% - 4.00% [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances 5,442 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 5,442 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  
Retirement Plan Services [Member] | Minimum Crediting Rate 4.01% and above [Member]      
Policyholder Account Balance [Line Items]      
Policyholder account balances $ 1,598 $ 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 $ 1,598 $ 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%