Insurance and Contractholder Liabilities - Account Balances (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current
Contractholder deposit funds	$ 365	$ 352
Future policy benefits	229
Unearned premiums	576
Future policy benefits, including held for sale liabilities		312
Unearned premiums, including held for sale liabilities		558
Total		5,929
Insurance and contractholder liabilities classified as held for sale		(611)
Current insurance and contractholder liabilities	5,385	5,318
Non-current
Contractholder deposit funds	6,515	6,702
Future policy benefits	4,708
Unearned premiums	22
Future policy benefits, including held for sale liabilities		9,194
Unearned premiums, including held for sale liabilities		418
Total		16,596
Insurance and contractholder liabilities classified as held for sale		(4,033)
Non-current insurance and contractholder liabilities	11,481	12,563
Total
Contractholder deposit funds	6,880	7,054
Future policy benefits	4,937
Unearned premiums	598
Future policy benefits, including held for sale liabilities		9,506
Unearned premiums, including held for sale liabilities		976
Total		22,525
Insurance and contractholder liabilities classified as held for sale		(4,644)
Total insurance and contractholder liabilities per Consolidated Balance Sheets	16,866	17,881
Future policy benefits classified as liabilities of business held for sale		3,800
Unpaid claims classified as liabilities of business held for sale		400
Contractholder deposit funds classified as liabilities of business held for sale		400
Cigna Healthcare
Current
Unpaid claims and claim expenses	4,117
Unpaid claims and claim expenses, including held for sale liabilities		4,159
Non-current
Unpaid claims and claim expenses	59
Unpaid claims and claim expenses, including held for sale liabilities		102
Total
Unpaid claims and claim expenses	4,176	4,261	$ 3,695	$ 3,336
Unpaid claims and claims expenses, including held for sale liabilities		4,261
Other Operations
Current
Unpaid claims and claim expenses	98
Unpaid claims and claim expenses, including held for sale liabilities		548
Non-current
Unpaid claims and claim expenses	177
Unpaid claims and claim expenses, including held for sale liabilities		180
Total
Unpaid claims and claim expenses	$ 275
Unpaid claims and claims expenses, including held for sale liabilities		$ 728