Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 2,791	$ 2,986	$ 5,015	$ 4,998
Other comprehensive income (loss), net of tax:
Net unrealized investment gains (losses)	149	524	(237)	213
Foreign currency translation adjustments	1	6	(1)	(6)
Net cash flow hedges	(3)	(3)	(7)	(12)
Pension and other postretirement benefits	1	(1)	1	(1)
Other comprehensive income (loss)	148	526	(244)	194
Comprehensive income	2,939	3,512	4,771	5,192
Comprehensive income attributable to noncontrolling interests	(8)	(11)	(9)	(16)
Comprehensive income attributable to CVS Health	$ 2,931	$ 3,501	$ 4,762	$ 5,176