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Unpaid Claims and Claim Expense Short Duration Contracts (Schedule of Historical Claims Duration) (Details) - Life Insurance Product Line [Member]
Dec. 31, 2023
Americas [Member]  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Short-duration Insurance Contracts, Historical Claims Duration, Year One 35.80%
Short-duration Insurance Contracts, Historical Claims Duration, Year Two 44.60%
Short-duration Insurance Contracts, Historical Claims Duration, Year Three 8.90%
Short-duration Insurance Contracts, Historical Claims Duration, Year Four 2.60%
Short-duration Insurance Contracts, Historical Claims Duration, Year Five 1.60%
Short-duration Insurance Contracts, Historical Claims Duration, Year Six 1.30%
Short-duration Insurance Contracts, Historical Claims Duration, Year Seven 1.00%
Short-duration Insurance Contracts, Historical Claims Duration, Year Eight 1.20%
Short-duration Insurance Contracts, Historical Claims Duration, Year Nine 0.80%
Short-duration Insurance Contracts, Historical Claims Duration, Year Ten 1.00%
Asia Pacific [Member]  
Short-duration Insurance Contracts, Historical Claims Duration [Line Items]  
Short-duration Insurance Contracts, Historical Claims Duration, Year One 14.90%
Short-duration Insurance Contracts, Historical Claims Duration, Year Two 27.30%
Short-duration Insurance Contracts, Historical Claims Duration, Year Three 16.30%
Short-duration Insurance Contracts, Historical Claims Duration, Year Four 11.50%
Short-duration Insurance Contracts, Historical Claims Duration, Year Five 7.60%
Short-duration Insurance Contracts, Historical Claims Duration, Year Six 5.40%
Short-duration Insurance Contracts, Historical Claims Duration, Year Seven 4.00%
Short-duration Insurance Contracts, Historical Claims Duration, Year Eight 2.60%
Short-duration Insurance Contracts, Historical Claims Duration, Year Nine 1.40%
Short-duration Insurance Contracts, Historical Claims Duration, Year Ten 1.20%