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Policyholders' Account Balances (Guaranteed Minimum Crediting Rate) (Details)
$ in Millions
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Rate
Dec. 31, 2021
USD ($)
Rate
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 147,018 $ 135,624 $ 123,042
1 - 50 bps above guaranteed minimum | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate 1 1 1
1 - 50 bps above guaranteed minimum | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate 50 50 50
51 - 150 bps above guaranteed minimum | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate 51 51 51
51 - 150 bps above guaranteed minimum | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate 150 150 150
Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate 150 150 150
Institutional      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 9,684 $ 9,855 $ 8,956
Institutional | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 9,684 9,855 8,956
Institutional | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Institutional | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Institutional | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Individual Variable      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 4,051 4,592 5,995
Individual Variable | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 3,192 3,688 5,063
Individual Variable | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 826 874 901
Individual Variable | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 33 30 31
Individual Variable | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Individual Fixed      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 3,121 2,032 1,924
Individual Fixed | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 1,492 1,582 1,750
Individual Fixed | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 602 117 69
Individual Fixed | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 813 250 100
Individual Fixed | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 214 83 5
Group Insurance      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 2,842 3,285 3,781
Group Insurance | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 1,645 1,721 1,755
Group Insurance | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Group Insurance | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Group Insurance | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 1,197 1,564 2,026
Variable/ Universal Life      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 24,064 23,753 24,287
Variable/ Universal Life | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 10,144 14,215 14,481
Variable/ Universal Life | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 5,537 153 2,050
Variable/ Universal Life | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 6,843 5,468 4,410
Variable/ Universal Life | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 1,540 3,917 3,346
Life Planner      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 8,334 7,099 7,507
Life Planner | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 6,178 6,551 7,364
Life Planner | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 71 51 51
Life Planner | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 89 93 92
Life Planner | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 1,996 404 0
Gibraltar Life and Other      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 38,311 35,072 37,215
Gibraltar Life and Other | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 37,902 34,684 36,860
Gibraltar Life and Other | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 373 345 355
Gibraltar Life and Other | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 36 43 0
Gibraltar Life and Other | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Full Service      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     36,505
Full Service | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     20,298
Full Service | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     14,227
Full Service | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     1,980
Full Service | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     0
Less than 1.00% | Institutional      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 589 $ 401 $ 0
Policyholder Account Balance, Guaranteed Minimum Credit Rating 1.00% 1.00% 1.00%
Less than 1.00% | Institutional | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 589 $ 401 $ 0
Less than 1.00% | Institutional | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Less than 1.00% | Institutional | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Less than 1.00% | Institutional | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Less than 1.00% | Individual Variable      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 1,733 $ 1,889 $ 2,307
Policyholder Account Balance, Guaranteed Minimum Credit Rating 1.00% 1.00% 1.00%
Less than 1.00% | Individual Variable | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 908 $ 1,009 $ 1,394
Less than 1.00% | Individual Variable | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 807 861 894
Less than 1.00% | Individual Variable | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 18 19 19
Less than 1.00% | Individual Variable | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Less than 1.00% | Individual Fixed      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 118 $ 0 $ 0
Policyholder Account Balance, Guaranteed Minimum Credit Rating 1.00% 1.00% 1.00%
Less than 1.00% | Individual Fixed | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 0 $ 0 $ 0
Less than 1.00% | Individual Fixed | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Less than 1.00% | Individual Fixed | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 1 0 0
Less than 1.00% | Individual Fixed | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 117 0 0
Less than 1.00% | Group Insurance      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 1,147 $ 1,564 $ 2,026
Policyholder Account Balance, Guaranteed Minimum Credit Rating 1.00% 1.00% 1.00%
Less than 1.00% | Group Insurance | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 0 $ 0 $ 0
Less than 1.00% | Group Insurance | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Less than 1.00% | Group Insurance | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Less than 1.00% | Group Insurance | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 1,147 1,564 2,026
Less than 1.00% | Variable/ Universal Life      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 368 $ 12 $ 18
Policyholder Account Balance, Guaranteed Minimum Credit Rating 1.00% 1.00% 1.00%
Less than 1.00% | Variable/ Universal Life | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 0 $ 12 $ 18
Less than 1.00% | Variable/ Universal Life | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Less than 1.00% | Variable/ Universal Life | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Less than 1.00% | Variable/ Universal Life | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 368 0 0
Less than 1.00% | Life Planner      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 2,459 $ 880 $ 518
Policyholder Account Balance, Guaranteed Minimum Credit Rating 1.00% 1.00% 1.00%
Less than 1.00% | Life Planner | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 331 $ 356 $ 398
Less than 1.00% | Life Planner | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 43 27 28
Less than 1.00% | Life Planner | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 89 93 92
Less than 1.00% | Life Planner | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 1,996 404 0
Less than 1.00% | Gibraltar Life and Other      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 15,975 $ 17,485 $ 21,177
Policyholder Account Balance, Guaranteed Minimum Credit Rating 1.00% 1.00% 1.00%
Less than 1.00% | Gibraltar Life and Other | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 15,975 $ 17,485 $ 21,177
Less than 1.00% | Gibraltar Life and Other | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Less than 1.00% | Gibraltar Life and Other | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Less than 1.00% | Gibraltar Life and Other | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Less than 1.00% | Full Service      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     $ 448
Policyholder Account Balance, Guaranteed Minimum Credit Rating | Rate     1.00%
Less than 1.00% | Full Service | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     $ 448
Less than 1.00% | Full Service | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     0
Less than 1.00% | Full Service | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     0
Less than 1.00% | Full Service | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     0
1.00% - 1.99% | Institutional      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 1,552 $ 1,575 $ 1,470
1.00% - 1.99% | Institutional | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 1.00% 1.00% 1.00%
1.00% - 1.99% | Institutional | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 1.99% 1.99% 1.99%
1.00% - 1.99% | Institutional | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 1,552 $ 1,575 $ 1,470
1.00% - 1.99% | Institutional | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
1.00% - 1.99% | Institutional | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
1.00% - 1.99% | Institutional | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
1.00% - 1.99% | Individual Variable      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 221 $ 249 $ 274
1.00% - 1.99% | Individual Variable | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 1.00% 1.00% 1.00%
1.00% - 1.99% | Individual Variable | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 1.99% 1.99% 1.99%
1.00% - 1.99% | Individual Variable | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 218 $ 246 $ 271
1.00% - 1.99% | Individual Variable | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 2 2 2
1.00% - 1.99% | Individual Variable | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 1 1 1
1.00% - 1.99% | Individual Variable | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
1.00% - 1.99% | Individual Fixed      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 978 $ 1,060 $ 798
1.00% - 1.99% | Individual Fixed | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 1.00% 1.00% 1.00%
1.00% - 1.99% | Individual Fixed | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 1.99% 1.99% 1.99%
1.00% - 1.99% | Individual Fixed | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 526 $ 614 $ 626
1.00% - 1.99% | Individual Fixed | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 122 113 67
1.00% - 1.99% | Individual Fixed | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 250 250 100
1.00% - 1.99% | Individual Fixed | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 80 83 5
1.00% - 1.99% | Group Insurance      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 0 $ 7 $ 7
1.00% - 1.99% | Group Insurance | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 1.00% 1.00% 1.00%
1.00% - 1.99% | Group Insurance | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 1.99% 1.99% 1.99%
1.00% - 1.99% | Group Insurance | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 0 $ 7 $ 7
1.00% - 1.99% | Group Insurance | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
1.00% - 1.99% | Group Insurance | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
1.00% - 1.99% | Group Insurance | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
1.00% - 1.99% | Variable/ Universal Life      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 3,602 $ 3,122 $ 2,920
1.00% - 1.99% | Variable/ Universal Life | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 1.00% 1.00% 1.00%
1.00% - 1.99% | Variable/ Universal Life | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 1.99% 1.99% 1.99%
1.00% - 1.99% | Variable/ Universal Life | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 201 $ 420 $ 382
1.00% - 1.99% | Variable/ Universal Life | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
1.00% - 1.99% | Variable/ Universal Life | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 2,588 774 0
1.00% - 1.99% | Variable/ Universal Life | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 813 1,928 2,538
1.00% - 1.99% | Life Planner      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 2,997 $ 3,199 $ 3,612
1.00% - 1.99% | Life Planner | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 1.00% 1.00% 1.00%
1.00% - 1.99% | Life Planner | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 1.99% 1.99% 1.99%
1.00% - 1.99% | Life Planner | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 2,969 $ 3,175 $ 3,589
1.00% - 1.99% | Life Planner | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 28 24 23
1.00% - 1.99% | Life Planner | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
1.00% - 1.99% | Life Planner | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
1.00% - 1.99% | Gibraltar Life and Other      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 9,079 $ 10,064 $ 11,525
1.00% - 1.99% | Gibraltar Life and Other | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 1.00% 1.00% 1.00%
1.00% - 1.99% | Gibraltar Life and Other | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 1.99% 1.99% 1.99%
1.00% - 1.99% | Gibraltar Life and Other | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 9,016 $ 10,064 $ 11,525
1.00% - 1.99% | Gibraltar Life and Other | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 63 0 0
1.00% - 1.99% | Gibraltar Life and Other | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
1.00% - 1.99% | Gibraltar Life and Other | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
1.00% - 1.99% | Full Service      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     $ 29,366
1.00% - 1.99% | Full Service | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating | Rate     1.00%
1.00% - 1.99% | Full Service | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating | Rate     1.99%
1.00% - 1.99% | Full Service | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     $ 13,224
1.00% - 1.99% | Full Service | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     14,162
1.00% - 1.99% | Full Service | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     1,980
1.00% - 1.99% | Full Service | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     0
2.00% - 2.99% | Institutional      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 596 $ 672 $ 832
2.00% - 2.99% | Institutional | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 2.00% 2.00% 2.00%
2.00% - 2.99% | Institutional | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 2.99% 2.99% 2.99%
2.00% - 2.99% | Institutional | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 596 $ 672 $ 832
2.00% - 2.99% | Institutional | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
2.00% - 2.99% | Institutional | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
2.00% - 2.99% | Institutional | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
2.00% - 2.99% | Individual Variable      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 37 $ 34 $ 116
2.00% - 2.99% | Individual Variable | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 2.00% 2.00% 2.00%
2.00% - 2.99% | Individual Variable | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 2.99% 2.99% 2.99%
2.00% - 2.99% | Individual Variable | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 29 $ 33 $ 115
2.00% - 2.99% | Individual Variable | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 4 1 0
2.00% - 2.99% | Individual Variable | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 4 0 1
2.00% - 2.99% | Individual Variable | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
2.00% - 2.99% | Individual Fixed      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 1,598 $ 474 $ 585
2.00% - 2.99% | Individual Fixed | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 2.00% 2.00% 2.00%
2.00% - 2.99% | Individual Fixed | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 2.99% 2.99% 2.99%
2.00% - 2.99% | Individual Fixed | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 550 $ 474 $ 585
2.00% - 2.99% | Individual Fixed | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 469 0 0
2.00% - 2.99% | Individual Fixed | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 562 0 0
2.00% - 2.99% | Individual Fixed | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 17 0 0
2.00% - 2.99% | Group Insurance      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 29 $ 53 $ 55
2.00% - 2.99% | Group Insurance | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 2.00% 2.00% 2.00%
2.00% - 2.99% | Group Insurance | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 2.99% 2.99% 2.99%
2.00% - 2.99% | Group Insurance | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 29 $ 53 $ 55
2.00% - 2.99% | Group Insurance | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
2.00% - 2.99% | Group Insurance | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
2.00% - 2.99% | Group Insurance | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
2.00% - 2.99% | Variable/ Universal Life      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 4,759 $ 4,781 $ 4,895
2.00% - 2.99% | Variable/ Universal Life | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 2.00% 2.00% 2.00%
2.00% - 2.99% | Variable/ Universal Life | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 2.99% 2.99% 2.99%
2.00% - 2.99% | Variable/ Universal Life | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 30 $ 402 $ 413
2.00% - 2.99% | Variable/ Universal Life | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 1,445 121 0
2.00% - 2.99% | Variable/ Universal Life | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 2,944 2,414 3,735
2.00% - 2.99% | Variable/ Universal Life | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 340 1,844 747
2.00% - 2.99% | Life Planner      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 2,124 $ 2,285 $ 2,631
2.00% - 2.99% | Life Planner | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 2.00% 2.00% 2.00%
2.00% - 2.99% | Life Planner | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 2.99% 2.99% 2.99%
2.00% - 2.99% | Life Planner | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 2,124 $ 2,285 $ 2,631
2.00% - 2.99% | Life Planner | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
2.00% - 2.99% | Life Planner | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
2.00% - 2.99% | Life Planner | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
2.00% - 2.99% | Gibraltar Life and Other      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 3,460 $ 3,665 $ 3,728
2.00% - 2.99% | Gibraltar Life and Other | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 2.00% 2.00% 2.00%
2.00% - 2.99% | Gibraltar Life and Other | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 2.99% 2.99% 2.99%
2.00% - 2.99% | Gibraltar Life and Other | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 3,114 $ 3,277 $ 3,373
2.00% - 2.99% | Gibraltar Life and Other | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 310 345 355
2.00% - 2.99% | Gibraltar Life and Other | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 36 43 0
2.00% - 2.99% | Gibraltar Life and Other | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
2.00% - 2.99% | Full Service      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     $ 6
2.00% - 2.99% | Full Service | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating | Rate     2.00%
2.00% - 2.99% | Full Service | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating | Rate     2.99%
2.00% - 2.99% | Full Service | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     $ 0
2.00% - 2.99% | Full Service | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     6
2.00% - 2.99% | Full Service | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     0
2.00% - 2.99% | Full Service | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     0
3.00% - 4.00% | Institutional      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 5,041 $ 5,697 $ 5,119
3.00% - 4.00% | Institutional | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 3.00% 3.00% 3.00%
3.00% - 4.00% | Institutional | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 4.00% 4.00% 4.00%
3.00% - 4.00% | Institutional | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 5,041 $ 5,697 $ 5,119
3.00% - 4.00% | Institutional | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
3.00% - 4.00% | Institutional | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
3.00% - 4.00% | Institutional | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
3.00% - 4.00% | Individual Variable      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 1,965 $ 2,309 $ 3,182
3.00% - 4.00% | Individual Variable | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 3.00% 3.00% 3.00%
3.00% - 4.00% | Individual Variable | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 4.00% 4.00% 4.00%
3.00% - 4.00% | Individual Variable | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 1,942 $ 2,289 $ 3,167
3.00% - 4.00% | Individual Variable | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 13 10 5
3.00% - 4.00% | Individual Variable | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 10 10 10
3.00% - 4.00% | Individual Variable | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
3.00% - 4.00% | Individual Fixed      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 332 $ 393 $ 425
3.00% - 4.00% | Individual Fixed | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 3.00% 3.00% 3.00%
3.00% - 4.00% | Individual Fixed | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 4.00% 4.00% 4.00%
3.00% - 4.00% | Individual Fixed | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 321 $ 389 $ 423
3.00% - 4.00% | Individual Fixed | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 11 4 2
3.00% - 4.00% | Individual Fixed | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
3.00% - 4.00% | Individual Fixed | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
3.00% - 4.00% | Group Insurance      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 1,593 $ 1,658 $ 1,689
3.00% - 4.00% | Group Insurance | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 3.00% 3.00% 3.00%
3.00% - 4.00% | Group Insurance | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 4.00% 4.00% 4.00%
3.00% - 4.00% | Group Insurance | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 1,543 $ 1,658 $ 1,689
3.00% - 4.00% | Group Insurance | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
3.00% - 4.00% | Group Insurance | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
3.00% - 4.00% | Group Insurance | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 50 0 0
3.00% - 4.00% | Variable/ Universal Life      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 9,844 $ 10,244 $ 10,852
3.00% - 4.00% | Variable/ Universal Life | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 3.00% 3.00% 3.00%
3.00% - 4.00% | Variable/ Universal Life | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 4.00% 4.00% 4.00%
3.00% - 4.00% | Variable/ Universal Life | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 4,422 $ 7,787 $ 8,066
3.00% - 4.00% | Variable/ Universal Life | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 4,092 32 2,050
3.00% - 4.00% | Variable/ Universal Life | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 1,311 2,280 675
3.00% - 4.00% | Variable/ Universal Life | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 19 145 61
3.00% - 4.00% | Life Planner      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 354 $ 330 $ 307
3.00% - 4.00% | Life Planner | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 3.00% 3.00% 3.00%
3.00% - 4.00% | Life Planner | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 4.00% 4.00% 4.00%
3.00% - 4.00% | Life Planner | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 354 $ 330 $ 307
3.00% - 4.00% | Life Planner | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
3.00% - 4.00% | Life Planner | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
3.00% - 4.00% | Life Planner | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
3.00% - 4.00% | Gibraltar Life and Other      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 4,378 $ 2,555 $ 459
3.00% - 4.00% | Gibraltar Life and Other | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 3.00% 3.00% 3.00%
3.00% - 4.00% | Gibraltar Life and Other | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating 4.00% 4.00% 4.00%
3.00% - 4.00% | Gibraltar Life and Other | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 4,378 $ 2,555 $ 459
3.00% - 4.00% | Gibraltar Life and Other | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
3.00% - 4.00% | Gibraltar Life and Other | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
3.00% - 4.00% | Gibraltar Life and Other | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
3.00% - 4.00% | Full Service      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     $ 6,669
3.00% - 4.00% | Full Service | Minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating | Rate     3.00%
3.00% - 4.00% | Full Service | Maximum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance, Guaranteed Minimum Credit Rating | Rate     4.00%
3.00% - 4.00% | Full Service | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     $ 6,610
3.00% - 4.00% | Full Service | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     59
3.00% - 4.00% | Full Service | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     0
3.00% - 4.00% | Full Service | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     0
Greater than 4.00% | Institutional      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 1,906 $ 1,510 $ 1,535
Policyholder Account Balance, Guaranteed Minimum Credit Rating 4.00% 4.00% 4.00%
Greater than 4.00% | Institutional | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 1,906 $ 1,510 $ 1,535
Greater than 4.00% | Institutional | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Greater than 4.00% | Institutional | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Greater than 4.00% | Institutional | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Greater than 4.00% | Individual Variable      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 95 $ 111 $ 116
Policyholder Account Balance, Guaranteed Minimum Credit Rating 4.00% 4.00% 4.00%
Greater than 4.00% | Individual Variable | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 95 $ 111 $ 116
Greater than 4.00% | Individual Variable | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Greater than 4.00% | Individual Variable | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Greater than 4.00% | Individual Variable | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Greater than 4.00% | Individual Fixed      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 95 $ 105 $ 116
Policyholder Account Balance, Guaranteed Minimum Credit Rating 4.00% 4.00% 4.00%
Greater than 4.00% | Individual Fixed | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 95 $ 105 $ 116
Greater than 4.00% | Individual Fixed | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Greater than 4.00% | Individual Fixed | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Greater than 4.00% | Individual Fixed | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Greater than 4.00% | Group Insurance      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 73 $ 3 $ 4
Policyholder Account Balance, Guaranteed Minimum Credit Rating 4.00% 4.00% 4.00%
Greater than 4.00% | Group Insurance | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 73 $ 3 $ 4
Greater than 4.00% | Group Insurance | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Greater than 4.00% | Group Insurance | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Greater than 4.00% | Group Insurance | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Greater than 4.00% | Variable/ Universal Life      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 5,491 $ 5,594 $ 5,602
Policyholder Account Balance, Guaranteed Minimum Credit Rating 4.00% 4.00% 4.00%
Greater than 4.00% | Variable/ Universal Life | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 5,491 $ 5,594 $ 5,602
Greater than 4.00% | Variable/ Universal Life | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Greater than 4.00% | Variable/ Universal Life | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Greater than 4.00% | Variable/ Universal Life | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Greater than 4.00% | Life Planner      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 400 $ 405 $ 439
Policyholder Account Balance, Guaranteed Minimum Credit Rating 4.00% 4.00% 4.00%
Greater than 4.00% | Life Planner | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 400 $ 405 $ 439
Greater than 4.00% | Life Planner | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Greater than 4.00% | Life Planner | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Greater than 4.00% | Life Planner | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Greater than 4.00% | Gibraltar Life and Other      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 5,419 $ 1,303 $ 326
Policyholder Account Balance, Guaranteed Minimum Credit Rating 4.00% 4.00% 4.00%
Greater than 4.00% | Gibraltar Life and Other | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 5,419 $ 1,303 $ 326
Greater than 4.00% | Gibraltar Life and Other | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Greater than 4.00% | Gibraltar Life and Other | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance 0 0 0
Greater than 4.00% | Gibraltar Life and Other | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance $ 0 $ 0 0
Greater than 4.00% | Full Service      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     $ 16
Policyholder Account Balance, Guaranteed Minimum Credit Rating | Rate     4.00%
Greater than 4.00% | Full Service | At guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     $ 16
Greater than 4.00% | Full Service | 1 - 50 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     0
Greater than 4.00% | Full Service | 51 - 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     0
Greater than 4.00% | Full Service | Greater Than 150 bps above guaranteed minimum      
Policyholder Account Balance [Line Items]      
Policyholder Account Balance     $ 0