Basis of Financial Statements - Future Policy Benefits (Details) - Life and Annuity Insurance Product Line	Jun. 30, 2020
Maximum
Ceded Credit Risk [Line Items]
Investment yield assumptions	6.00%
Minimum
Ceded Credit Risk [Line Items]
Investment yield assumptions	2.50%

Estimated average rate of return on investments which is included in the calculation of the amount of the specified guaranteed benefit obligation as of the balance sheet date.

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant