Debt (Interest Payable) (Details) - Surplus Notes	Dec. 31, 2020
A+
Financing Receivable, Credit Quality Indicator [Line Items]
Applicable Interest Rate	5.875%
A
Financing Receivable, Credit Quality Indicator [Line Items]
Applicable Interest Rate	6.375%
A-
Financing Receivable, Credit Quality Indicator [Line Items]
Applicable Interest Rate	6.875%
B++ (or lower)
Financing Receivable, Credit Quality Indicator [Line Items]
Applicable Interest Rate	7.375%