Investments (Narrative) (Details) - USD ($)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Schedule of Investments [Line Items]
Impairment losses on investments	$ 0	$ 28,500,000
Impairments on fixed maturities included intend to sell		16,000,000.0
Impairments on fixed maturities credit related losses		6,200,000
Fixed Maturities [Member]
Schedule of Investments [Line Items]
Impairment losses on investments		22,200,000
Mortgage Loans [Member]
Schedule of Investments [Line Items]
Impairment losses on investments		$ 4,800,000
Allowance for credit losses	7,900,000		$ 7,900,000
Fixed Maturities Including Held For Sale [Member]
Schedule of Investments [Line Items]
Allowance for credit losses	$ 0		$ 100,000