Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block]: Short-duration Insurance Contracts, Schedule of Historical Claims Duration (Details)	Dec. 31, 2020
Specialty Health Segment, All Product Lines
Short-duration Insurance Contracts, Historical Claims Duration, Year One	62.30%
Short-duration Insurance Contracts, Historical Claims Duration, Year Two	31.20%
Short-duration Insurance Contracts, Historical Claims Duration, Year Three	4.20%
Short-duration Insurance Contracts, Historical Claims Duration, Year Four	1.30%
Short-duration Insurance Contracts, Historical Claims Duration, Year Five	0.80%
Group Disability Product Line
Short-duration Insurance Contracts, Historical Claims Duration, Year One	16.70%
Short-duration Insurance Contracts, Historical Claims Duration, Year Two	18.10%
Short-duration Insurance Contracts, Historical Claims Duration, Year Three	5.80%
Short-duration Insurance Contracts, Historical Claims Duration, Year Four	2.70%
Short-duration Insurance Contracts, Historical Claims Duration, Year Five	2.00%
Short-duration Insurance Contracts, Historical Claims Duration, Year Six	1.80%
Short-duration Insurance Contracts, Historical Claims Duration, Year Seven	1.40%
Short-duration Insurance Contracts, Historical Claims Duration, Year Eight	0.90%
Short-duration Insurance Contracts, Historical Claims Duration, Year Nine	0.60%
Short-duration Insurance Contracts, Historical Claims Duration, Year Ten	0.40%