Schedule I - Condensed Financial Information of Cigna Corporation - Statements of Income (Details) - USD ($) $ in Millions	2 Months Ended	12 Months Ended
	Apr. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues
Net investment income		$ 1,549	$ 1,244	$ 1,390
TOTAL REVENUES		174,078	160,401	153,566
Operating expenses
Selling, general and administrative expenses		13,030	14,072	14,053
TOTAL BENEFITS AND EXPENSES		166,143	152,248	145,489
Income from operations		7,935	8,153	8,077
Interest expense and other		(1,208)	(1,438)	(1,682)
Debt extinguishment costs		(141)	(199)	(2)
Net realized investment gains (losses)		196	149	177
Income before income taxes		6,782	10,868	6,570
Income tax (benefit)		1,367	2,379	1,450
SHAREHOLDERS' NET INCOME		5,365	8,458	5,104
Other comprehensive income (loss), net of tax
SHAREHOLDERS' COMPREHENSIVE INCOME		5,342	8,538	5,874
Cigna
Revenues
Net investment income		0	1	0
Intercompany interest income		471	475	6
TOTAL REVENUES		471	476	6
Operating expenses
Selling, general and administrative expenses		8	4	(85)
TOTAL BENEFITS AND EXPENSES		8	4	(85)
Income from operations		463	472	91
Interest expense and other		(1,197)	(1,324)	(1,032)
Intercompany interest (expense)		(13)	(48)	(127)
Debt extinguishment costs	$ (131)	(131)	(171)	0
Income before income taxes		(878)	(1,071)	(1,068)
Income tax (benefit)		(180)	(234)	(251)
Loss of Parent Company		(698)	(837)	(817)
Equity in income of subsidiaries		6,063	9,295	5,921
SHAREHOLDERS' NET INCOME		5,365	8,458	5,104
Other comprehensive income (loss), net of tax
Net unrealized appreciation (depreciation) on securities and derivatives		(215)	(75)	957
Net translation gains (losses) on foreign currencies		(218)	260	(54)
Postretirement benefits liability adjustment		410	(105)	(133)
Shareholders' other comprehensive income (loss), net of tax		(23)	80	770
SHAREHOLDERS' COMPREHENSIVE INCOME		$ 5,342	$ 8,538	$ 5,874