Investments Fixed Maturity Securities Stratified by Credit Quality (Details)		Jun. 30, 2020	Dec. 31, 2019
Debt Securities, Credit Quality Indicator [Line Items]
Debt Securities, Held-to-maturity, by Credit Quality	[1]		100.00%
Debt Securities, by Credit Quality	[1]	100.00%	100.00%
Blend, Aaa Rating [Member]
Debt Securities, Credit Quality Indicator [Line Items]
Debt Securities, Held-to-maturity, by Credit Quality	[1]		39.50%
Debt Securities, by Credit Quality	[1]	23.60%	23.90%
Blend, Aa Rating [Member]
Debt Securities, Credit Quality Indicator [Line Items]
Debt Securities, Held-to-maturity, by Credit Quality	[1]		52.50%
Debt Securities, by Credit Quality	[1]	12.80%	13.10%
Blend, A Rating [Member]
Debt Securities, Credit Quality Indicator [Line Items]
Debt Securities, Held-to-maturity, by Credit Quality	[1]		8.00%
Debt Securities, by Credit Quality	[1]	32.90%	32.60%
Blend, Baa Rating [Member]
Debt Securities, Credit Quality Indicator [Line Items]
Debt Securities, Held-to-maturity, by Credit Quality	[1]		0.00%
Debt Securities, by Credit Quality	[1]	26.20%	26.10%
Blend, Investment Grade [Member]
Debt Securities, Credit Quality Indicator [Line Items]
Debt Securities, Held-to-maturity, by Credit Quality	[1]		100.00%
Debt Securities, by Credit Quality	[1]	95.50%	95.70%
Blend, Non-investment Grade [Member]
Debt Securities, Credit Quality Indicator [Line Items]
Debt Securities, Held-to-maturity, by Credit Quality	[1],[2]		0.00%
Debt Securities, by Credit Quality	[1],[2]	4.50%	4.30%

[1] Credit quality ratings referred to herein are a blend of those assigned by the major credit rating agencies for U.S. and Canadian Governments, Agencies, Corporates and Municipal issuers.

[2] "All other" includes non-investment grade or non-rated issuers.