Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block]: Short-duration Insurance Contracts, Schedule of Historical Claims Duration (Details)	Dec. 31, 2019
Specialty Health Segment Member
Short-duration Insurance Contracts, Historical Claims Duration, Year One	62.70%
Short-duration Insurance Contracts, Historical Claims Duration, Year Two	30.30%
Short-duration Insurance Contracts, Historical Claims Duration, Year Three	3.60%
Short-duration Insurance Contracts, Historical Claims Duration, Year Four	1.60%
Short-duration Insurance Contracts, Historical Claims Duration, Year Five	1.60%
Group disability, life, DBL and PFL | Group Disability Product Line
Short-duration Insurance Contracts, Historical Claims Duration, Year One	17.60%
Short-duration Insurance Contracts, Historical Claims Duration, Year Two	20.30%
Short-duration Insurance Contracts, Historical Claims Duration, Year Three	6.70%
Short-duration Insurance Contracts, Historical Claims Duration, Year Four	3.10%
Short-duration Insurance Contracts, Historical Claims Duration, Year Five	2.10%
Short-duration Insurance Contracts, Historical Claims Duration, Year Six	2.10%
Short-duration Insurance Contracts, Historical Claims Duration, Year Seven	1.60%
Short-duration Insurance Contracts, Historical Claims Duration, Year Eight	0.70%
Short-duration Insurance Contracts, Historical Claims Duration, Year Nine	0.30%
Short-duration Insurance Contracts, Historical Claims Duration, Year Ten	0.10%