Acquisition - Proforma (Details) - Omnicare, Inc. - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2015	Jun. 30, 2015
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Total revenues	$ 38,589	$ 76,278
Net income attributable to CVS Health	$ 1,239	$ 2,444
Net income per share attributable to CVS Health:
Basic earnings per share (in dollars per share)	$ 1.10	$ 2.16
Diluted earnings per share (in dollars per share)	$ 1.09	$ 2.14

The pro forma basic net income per share for a period as if the business combination or combinations had been completed at the beginning of a period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=56956515&loc=d3e1392-128463

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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