Insurance and Contractholder Liabilities - Future Policy Benefits - Interest Rates and Duration (Details)	Dec. 31, 2024	Dec. 31, 2023
Cigna Healthcare
Insurance and Contractholder Liabilities [Line Items]
Interest accretion rate	2.85%	2.54%
Current discount rate	5.10%	4.92%
Weighted average duration	8 years 8 months 12 days	7 years 10 months 24 days
Other Operations
Insurance and Contractholder Liabilities [Line Items]
Interest accretion rate	5.64%	5.64%
Current discount rate	5.42%	4.87%
Weighted average duration	10 years 9 months 18 days	11 years 4 months 24 days