v3.25.1
Policyholder Account Balance, Guaranteed Minimum Crediting (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Mar. 31, 2024
Dec. 31, 2023
Operating Segments        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period $ 5,456.0 $ 5,470.0 $ 5,490.3 $ 5,514.2
Colonial Life        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 847.0 849.0 852.0 852.9
Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 564.9 568.8 574.1 578.6
Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 4,044.1 $ 4,052.2 4,064.2 $ 4,082.7
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 87.9   $ 91.3  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 | Minimum | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, Guaranteed Minimum Credit Rating     3.00%  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 | Maximum | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, Guaranteed Minimum Credit Rating     3.99%  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0499 | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 446.6   $ 452.1  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0499 | Minimum | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, Guaranteed Minimum Credit Rating     4.00%  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0499 | Maximum | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, Guaranteed Minimum Credit Rating     4.99%  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0500 and 0600 [Member] | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 30.4   $ 30.7  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0500 and 0600 [Member] | Minimum | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, Guaranteed Minimum Credit Rating     5.00%  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0500 and 0600 [Member] | Maximum | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, Guaranteed Minimum Credit Rating     6.00%  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0500        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period      
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0500 | Colonial Life        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 847.0   $ 852.0  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0500 | Minimum | Colonial Life        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, Guaranteed Minimum Credit Rating     4.00%  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0500 | Maximum | Colonial Life        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, Guaranteed Minimum Credit Rating     5.00%  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 and 0599 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 1,504.0   $ 1,601.6  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 and 0599 | Minimum | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, Guaranteed Minimum Credit Rating     3.00%  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 and 0599 | Maximum | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, Guaranteed Minimum Credit Rating     5.99%  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0600 and 0899 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 26.3   $ 26.2  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0600 and 0899 | Minimum | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, Guaranteed Minimum Credit Rating     6.00%  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0600 and 0899 | Maximum | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, Guaranteed Minimum Credit Rating     8.99%  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0900 and 1199 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 2,306.7   $ 2,245.7  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0900 and 1199 | Minimum | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, Guaranteed Minimum Credit Rating     9.00%  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0900 and 1199 | Maximum | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, Guaranteed Minimum Credit Rating     11.99%  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 1200 and 1500 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 207.1   $ 190.7  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 1200 and 1500 | Minimum | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, Guaranteed Minimum Credit Rating     12.00%  
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 1200 and 1500 | Maximum | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, Guaranteed Minimum Credit Rating     15.00%  
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Operating Segments        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 5,191.6   $ 1,845.3  
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 361.9   345.8  
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 3,989.0   653.7  
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 87.9   91.3  
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0499 | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 243.6   223.8  
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0500 and 0600 [Member] | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 30.4   30.7  
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0500 | Colonial Life        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 840.7   845.8  
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 and 0599 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 1,448.9   513.9  
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0600 and 0899 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 26.3   1.3  
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0900 and 1199 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 2,306.7   138.5  
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 1200 and 1500 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 207.1   0.0  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Operating Segments        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 257.5   3,581.0  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 203.0   191.4  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 48.2   3,383.4  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   0.0  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0499 | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 203.0   191.4  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0500 and 0600 [Member] | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   0.0  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0500 | Colonial Life        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 6.3   6.2  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 and 0599 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 48.2   1,060.6  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0600 and 0899 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   24.9  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0900 and 1199 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   2,107.2  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 1200 and 1500 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   190.7  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Operating Segments        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 6.9   64.0  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   36.9  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 6.9   27.1  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   0.0  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0499 | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   36.9  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0500 and 0600 [Member] | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   0.0  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0500 | Colonial Life        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   0.0  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 and 0599 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 6.9   27.1  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0600 and 0899 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   0.0  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0900 and 1199 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   0.0  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 1200 and 1500 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   0.0  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Operating Segments        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   0.0  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   0.0  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   0.0  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 to 0399 | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   0.0  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0499 | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   0.0  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0500 and 0600 [Member] | Voluntary Benefits | Unum US        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   0.0  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and 0500 | Colonial Life        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   0.0  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0300 and 0599 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   0.0  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0600 and 0899 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   0.0  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0900 and 1199 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period 0.0   0.0  
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 1200 and 1500 | Other Insurance Product Line | Closed Block        
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]        
Policyholder Account Balance, before Reserves in excess of Account Balance, end of period $ 0.0   $ 0.0