Insurance and Contractholder Liabilities - Future Policy Benefits - Interest Rates and Duration (Details)	Mar. 31, 2024	Mar. 31, 2023
Cigna Healthcare
Insurance and Contractholder Liabilities [Line Items]
Interest accretion rate	2.56%	2.59%
Current discount rate	5.11%	5.29%
Weighted average duration	7 years 9 months 18 days	8 years 1 month 6 days
Other Operations
Insurance and Contractholder Liabilities [Line Items]
Interest accretion rate	5.64%	5.64%
Current discount rate	5.16%	4.95%
Weighted average duration	11 years 3 months 18 days	11 years 8 months 12 days