Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) shares in Millions, $ in Millions		Total	Common Stock	Treasury Stock		Common Stock Including Capital Surplus	[2]	Retained Earnings	Accumulated Other Comprehensive Income	Total CVS Health Shareholders’ Equity	Noncontrolling Interests
Shares outstanding, balance at beginning of period (in shares) at Dec. 31, 2018			1,720	(425)	[1]
Balance at beginning of period at Dec. 31, 2018		$ 58,543		$ (28,228)	[1]	$ 45,440		$ 40,911	$ 102	$ 58,225	$ 318
Shareholders' Equity [Roll Forward]
Net income		1,427						1,421		1,421	6
Other comprehensive loss (Note 7)		331							331	331
Stock option activity, stock awards and other (in shares)			2
Stock option activity, stock awards and other		175				175				175
Purchase of treasury shares, net of ESPP issuances (in shares)	[1]			1
Purchase of treasury shares, net of ESPP issuances		7		$ 7	[1]					7
Common stock dividends		(651)						(651)		(651)
Other increases in noncontrolling interests		(4)									(4)
Shares outstanding, balance at end of period (in shares) at Mar. 31, 2019			1,722	(424)	[1]
Balance at end of period at Mar. 31, 2019		60,006		$ (28,221)	[1]	45,615		41,859	433	59,686	320
Shares outstanding, balance at beginning of period (in shares) at Dec. 31, 2019			1,727	(425)	[1]
Balance at beginning of period at Dec. 31, 2019		64,170		$ (28,235)	[1]	45,972		45,108	1,019	63,864	306
Shareholders' Equity [Roll Forward]
Net income		2,012						2,007		2,007	5
Other comprehensive loss (Note 7)		(332)							(332)	(332)
Stock option activity, stock awards and other (in shares)			2
Stock option activity, stock awards and other		208				208				208
Purchase of treasury shares, net of ESPP issuances (in shares)	[1]			1
Purchase of treasury shares, net of ESPP issuances		53		$ 53	[1]					53
Common stock dividends		(657)						(657)		(657)
Other increases in noncontrolling interests		23									23
Shares outstanding, balance at end of period (in shares) at Mar. 31, 2020			1,729	(424)	[1]
Balance at end of period at Mar. 31, 2020		$ 65,474		$ (28,182)	[1]	$ 46,180		$ 46,455	$ 687	$ 65,140	$ 334

[1] Treasury shares include 1 million shares held in trust and treasury stock includes $29 million related to shares held in trust as of March 31, 2020 and 2019 and December 31, 2019 and 2018.

[2] Common stock and capital surplus includes the par value of common stock of $17 million as of March 31, 2020 and 2019 and December 31, 2019 and 2018.