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Equity | 3 Months Ended
--- | ---
Mar. 31, 2018
Equity [Abstract] |
Equity | Equity
| Common Stock | Other Paid-In Capital | Retained Earnings | Accumulated Other Comprehensive Loss | Treasury Stock | Non- Controlling Interests | Total
($ and shares in millions) | Shares | Par Value | Shares | Cost
Balance at January 1, 2017 | 3,577 |  | $ | 1,788 |  | $ | 39,939 |  | $ | 44,133 |  | $ | (5,226 | ) | 828 |  | $ | (40,546 | ) | $ | 220 |  | $ | 40,308 |
Net income attributable to Merck & Co., Inc. | — |  | — |  | — |  | 1,551 |  | — |  | — |  | — |  | — |  | 1,551 |
Other comprehensive income, net of taxes | — |  | — |  | — |  | — |  | 146 |  | — |  | — |  | — |  | 146 |
Cash dividends declared on common stock | — |  | — |  | — |  | (1,297 | ) | — |  | — |  | — |  | — |  | (1,297 | )
Treasury stock shares purchased | — |  | — |  | — |  | — |  | — |  | 16 |  | (1,019 | ) | — |  | (1,019 | )
Share-based compensation plans and other | — |  | — |  | (40 | ) | — |  | — |  | (7 | ) | 408 |  | — |  | 368 |
Acquisition of Vallée | — |  | — |  | — |  | — |  | — |  | — |  | — |  | 25 |  | 25 |
Net income attributable to noncontrolling interests | — |  | — |  | — |  | — |  | — |  | — |  | — |  | 5 |  | 5 |
Other changes in noncontrolling ownership interests | — |  | — |  | — |  | — |  | — |  | — |  | — |  | 1 |  | 1 |
Balance at March 31, 2017 | 3,577 |  | $ | 1,788 |  | $ | 39,899 |  | $ | 44,387 |  | $ | (5,080 | ) | 837 |  | $ | (41,157 | ) | $ | 251 |  | $ | 40,088 |
Balance at January 1, 2018 | 3,577 |  | $ | 1,788 |  | $ | 39,902 |  | $ | 41,350 |  | $ | (4,910 | ) | 880 |  | $ | (43,794 | ) | $ | 233 |  | $ | 34,569 |
Adoption of new accounting standards (see Note 1) | — |  | — |  | — |  | 322 |  | (274 | ) | — |  | — |  | — |  | 48 |
Net income attributable to Merck & Co., Inc. | — |  | — |  | — |  | 736 |  | — |  | — |  | — |  | — |  | 736 |
Other comprehensive income, net of taxes | — |  | — |  | — |  | — |  | 124 |  | — |  | — |  | — |  | 124 |
Cash dividends declared on common stock | — |  | — |  | — |  | (1,301 | ) | — |  | — |  | — |  | — |  | (1,301 | )
Treasury stock shares purchased | — |  | — |  | — |  | — |  | — |  | 10 |  | (566 | ) | — |  | (566 | )
Share-based compensation plans and other | — |  | — |  | (28 | ) | — |  | — |  | (5 | ) | 319 |  | — |  | 291 |
Net income attributable to noncontrolling interests | — |  | — |  | — |  | — |  | — |  | — |  | — |  | 5 |  | 5 |
Distributions attributable to noncontrolling interests | — |  | — |  | — |  | — |  | — |  | — |  | — |  | (5 | ) | (5 | )
Balance at March 31, 2018 | 3,577 |  | $ | 1,788 |  | $ | 39,874 |  | $ | 41,107 |  | $ | (5,060 | ) | 885 |  | $ | (44,041 | ) | $ | 233 |  | $ | 33,901 |

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- References No definition available. + Details
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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -URI http://asc.fasb.org/topic&trid=2208762 + Details
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