Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 2,265	$ (3,399)	$ 6,321	$ 1,995
Other comprehensive income (loss), net of tax:
Net unrealized investment gains (losses)	(321)	(637)	85	(2,634)
Change in discount rate on long-duration insurance reserves	181	250	167	929
Foreign currency translation adjustments	(2)	(7)	(1)	(5)
Net cash flow hedges	(4)	8	9	20
Pension and other postretirement benefits	0	1	0	2
Other comprehensive income (loss)	(146)	(385)	260	(1,688)
Comprehensive income (loss)	2,119	(3,784)	6,581	307
Comprehensive income attributable to noncontrolling interests	(4)	(7)	(23)	(18)
Comprehensive income (loss) attributable to CVS Health	$ 2,115	$ (3,791)	$ 6,558	$ 289