Investments (Narrative) (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Schedule of Investments [Line Items]
Net unrealized gains on impaired securities					$ 4,200,000
Impairment recovery (losses) on investments	$ 1,400,000	$ (400,000)	$ (27,100,000)	$ (400,000)
Impairments on fixed maturities included intend to sell			16,200,000
Impairments on fixed maturities credit related losses			4,600,000
Fixed Maturities [Member]
Schedule of Investments [Line Items]
Impairment recovery (losses) on investments		$ (400,000)	20,800,000	$ (400,000)
Mortgage Loans [Member]
Schedule of Investments [Line Items]
Impairment recovery (losses) on investments			4,800,000
Allowance for credit losses	6,100,000		6,100,000		1,300,000
Fixed Maturities Including Held For Sale [Member]
Schedule of Investments [Line Items]
Allowance for credit losses	$ 3,800,000		$ 3,800,000		$ 0