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Acquisitions Pro Forma Financials (Details) $ / shares in Units, $ in Millions | 3 Months Ended
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Mar. 31, 2018 USD ($) $ / shares
Pro Forma Financials [Abstract] |
Total revenues | $ | $ 59,093
Net Income attributable to CVS Health | $ | $ 1,807
Net income per share attributable to CVS Health |
Basic | $ / shares | $ 1.40
Diluted | $ / shares | $ 1.39

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