Basis of Financial Statements - Benefits and Other Changes in Policy Reserves (Details)	9 Months Ended
	Sep. 30, 2020
Deferred Annuities | Minimum
Ceded Credit Risk [Line Items]
Interest crediting rates for funds at subsidiaries	0.50%
Deferred Annuities | Maximum
Ceded Credit Risk [Line Items]
Interest crediting rates for funds at subsidiaries	6.00%
IUL's | Minimum
Ceded Credit Risk [Line Items]
Interest crediting rates for funds at subsidiaries	3.00%
IUL's | Maximum
Ceded Credit Risk [Line Items]
Interest crediting rates for funds at subsidiaries	4.80%