Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 1,587	$ 1,219	$ 6,602	$ 6,217
Other comprehensive income (loss), net of tax:
Net unrealized investment gains (losses)	(73)	44	(310)	257
Foreign currency translation adjustments	(5)	1	(6)	(5)
Net cash flow hedges	(15)	(3)	(22)	(15)
Pension and other postretirement benefits	0	0	1	(1)
Other comprehensive income (loss)	(93)	42	(337)	236
Comprehensive income	1,494	1,261	6,265	6,453
Comprehensive (income) loss attributable to noncontrolling interests	11	5	2	(11)
Comprehensive income attributable to CVS Health	$ 1,505	$ 1,266	$ 6,267	$ 6,442