Insurance (Short-Duration Contracts Historical Claims) (Details)	Dec. 31, 2021
Group Life - Term
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
Short-duration Insurance Contracts, Historical Claims Duration, Year One	77.50%
Short-duration Insurance Contracts, Historical Claims Duration, Year Two	20.50%
Short-duration Insurance Contracts, Historical Claims Duration, Year Three	0.70%
Short-duration Insurance Contracts, Historical Claims Duration, Year Four	0.20%
Short-duration Insurance Contracts, Historical Claims Duration, Year Five	0.40%
Short-duration Insurance Contracts, Historical Claims Duration, Year Six	0.10%
Short-duration Insurance Contracts, Historical Claims Duration, Year Seven	0.00%
Short-duration Insurance Contracts, Historical Claims Duration, Year Eight	0.00%
Short-duration Insurance Contracts, Historical Claims Duration, Year Nine	0.00%
Short-duration Insurance Contracts, Historical Claims Duration, Year Ten	0.00%
Group Life - Term | Asia
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
Short-duration Insurance Contracts, Historical Claims Duration, Year One	25.60%
Short-duration Insurance Contracts, Historical Claims Duration, Year Two	25.10%
Short-duration Insurance Contracts, Historical Claims Duration, Year Three	13.90%
Short-duration Insurance Contracts, Historical Claims Duration, Year Four	10.60%
Short-duration Insurance Contracts, Historical Claims Duration, Year Five	7.30%
Short-duration Insurance Contracts, Historical Claims Duration, Year Six	4.50%
Short-duration Insurance Contracts, Historical Claims Duration, Year Seven	1.50%
Short-duration Insurance Contracts, Historical Claims Duration, Year Eight	3.30%
Short-duration Insurance Contracts, Historical Claims Duration, Year Nine	2.30%
Short-duration Insurance Contracts, Historical Claims Duration, Year Ten	1.70%
Group Long-Term Disability
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
Short-duration Insurance Contracts, Historical Claims Duration, Year One	4.80%
Short-duration Insurance Contracts, Historical Claims Duration, Year Two	20.90%
Short-duration Insurance Contracts, Historical Claims Duration, Year Three	15.00%
Short-duration Insurance Contracts, Historical Claims Duration, Year Four	9.10%
Short-duration Insurance Contracts, Historical Claims Duration, Year Five	7.20%
Short-duration Insurance Contracts, Historical Claims Duration, Year Six	6.40%
Short-duration Insurance Contracts, Historical Claims Duration, Year Seven	5.20%
Short-duration Insurance Contracts, Historical Claims Duration, Year Eight	4.40%
Short-duration Insurance Contracts, Historical Claims Duration, Year Nine	3.80%
Short-duration Insurance Contracts, Historical Claims Duration, Year Ten	3.60%
Protection Life | Latin America
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
Short-duration Insurance Contracts, Historical Claims Duration, Year One	57.40%
Short-duration Insurance Contracts, Historical Claims Duration, Year Two	31.90%
Short-duration Insurance Contracts, Historical Claims Duration, Year Three	3.90%
Short-duration Insurance Contracts, Historical Claims Duration, Year Four	1.10%
Short-duration Insurance Contracts, Historical Claims Duration, Year Five	0.60%
Short-duration Insurance Contracts, Historical Claims Duration, Year Six	0.60%
Short-duration Insurance Contracts, Historical Claims Duration, Year Seven	0.30%
Short-duration Insurance Contracts, Historical Claims Duration, Year Eight	0.80%
Short-duration Insurance Contracts, Historical Claims Duration, Year Nine	0.20%
Short-duration Insurance Contracts, Historical Claims Duration, Year Ten	1.60%
Protection Health | Latin America
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]
Short-duration Insurance Contracts, Historical Claims Duration, Year One	85.20%
Short-duration Insurance Contracts, Historical Claims Duration, Year Two	13.60%
Short-duration Insurance Contracts, Historical Claims Duration, Year Three	0.70%
Short-duration Insurance Contracts, Historical Claims Duration, Year Four	0.00%
Short-duration Insurance Contracts, Historical Claims Duration, Year Five	(0.10%)
Short-duration Insurance Contracts, Historical Claims Duration, Year Six	0.00%
Short-duration Insurance Contracts, Historical Claims Duration, Year Seven	0.10%
Short-duration Insurance Contracts, Historical Claims Duration, Year Eight	0.00%
Short-duration Insurance Contracts, Historical Claims Duration, Year Nine	0.00%
Short-duration Insurance Contracts, Historical Claims Duration, Year Ten	0.40%