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Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Quarterly Financial information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues | $ 54,424 | $ 47,490 | $ 46,922 | $ 45,743 | $ 48,391 | $ 46,186 | $ 45,689 | $ 44,520 | $ 194,579 | $ 184,786 | $ 177,546
Operating income (loss) | 824 | 2,574 | (1,373) | 1,996 | 3,114 | 2,504 | 2,121 | 1,799 | 4,021 | 9,538 | 10,386
Income (loss) from continuing operations | (422) | 1,390 | (2,562) | 998 | 3,287 | 1,285 | 1,097 | 962 | (596) | 6,631 | 5,320
Net income (loss) attributable to CVS Health | $ (419) | $ 1,390 | $ (2,563) | $ 998 | $ 3,287 | $ 1,285 | $ 1,098 | $ 952 | $ (594) | $ 6,622 | $ 5,317
Income (loss) from continuing operations attributable to CVS Health (in dollars per share) | $ (0.37) | $ 1.36 | $ (2.52) | $ 0.98 | $ 3.23 | $ 1.26 | $ 1.07 | $ 0.93 | $ (0.57) | $ 6.48 | $ 4.93
Income (loss) from discontinued operations attributable to CVS Health (in dollars per share) | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | (0.01) | 0.00 | (0.01) | 0.00
Net income (loss) attributable to CVS Health (in dollars per share) | (0.37) | 1.36 | (2.52) | 0.98 | 3.23 | 1.26 | 1.07 | 0.92 | (0.57) | 6.47 | 4.93
Income (loss) from continuing operations attributable to CVS Health (in dollars per share) | (0.37) | 1.36 | (2.52) | 0.98 | 3.22 | 1.26 | 1.07 | 0.92 | (0.57) | 6.45 | 4.91
Income (loss) from discontinued operations attributable to CVS Health (in dollars per share) | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | (0.01) | 0.00 | (0.01) | 0.00
Net income (loss) attributable to CVS Health (in dollars per share) | (0.37) | 1.36 | (2.52) | 0.98 | 3.22 | 1.26 | 1.07 | 0.92 | (0.57) | 6.44 | $ 4.90
Dividends per common share (in dollars per share) | $ 0.50 | $ 0.50 | $ 0.50 | $ 0.50 | $ 0.5 | $ 0.5 | $ 0.5 | $ 0.5 | $ 2.00 | $ 2.00 |
Interest expense |  |  |  |  |  |  |  |  | $ 2,619 | $ 1,062 | $ 1,078
Adjustments |  |  |  |  |  |  |  |  |  |  |
Quarterly Financial information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Total revenues |  | $ 221 | $ 214 | $ 50 | $ 6 | $ 5 | $ 4 | $ 6 |  | 21 | 20
Operating income (loss) |  |  |  |  |  |  |  |  |  | $ 21 | $ 20
Interest expense |  | $ 221 | $ 214 | $ 50 | $ 6 | $ 5 | $ 4 | $ 6 |  |  |

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