| USD ($) $ in Millions | Dec 31, 2025 | Dec 31, 2024 | Dec 31, 2023 | Dec 31, 2022 | Dec 31, 2021 | Dec 31, 2020 | Dec 31, 2019 | Dec 31, 2018 | Dec 31, 2017 | Dec 31, 2016 | Dec 31, 2015 | Dec 31, 2014 | Dec 31, 2013 | Dec 31, 2012 | Dec 31, 2011 | Dec 31, 2010 | Dec 31, 2009 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Current Assets | |||||||||||||||||
Cash and cash equivalents | $ 14,565 | $ 13,242 | $ 6,841 | ||||||||||||||
Short-term investments | 0 | 447 | 252 | ||||||||||||||
Accounts receivable (net of allowance for doubtful accounts of $97 in 2025 and $89 in 2024) | 11,775 | 10,278 | 10,349 | ||||||||||||||
Inventories (excludes inventories of $5,681 in 2025 and $4,193 in 2024 classified in Other assets - see Note 7) | 6,658 | 6,109 | 6,358 | ||||||||||||||
Other current assets | 10,518 | 8,706 | 8,368 | ||||||||||||||
Current assets of discontinued operations | - | - | - | ||||||||||||||
Total current assets | 43,516 | 38,782 | 32,168 | ||||||||||||||
Investments | 956 | 463 | 252 | ||||||||||||||
Property, Plant and Equipment (at cost) | |||||||||||||||||
Land | 321 | 307 | 326 | ||||||||||||||
Buildings | 17,983 | 16,360 | 14,966 | ||||||||||||||
Machinery, equipment and office furnishings | 19,760 | 18,283 | 17,763 | ||||||||||||||
Construction in progress | 9,166 | 7,984 | 8,262 | ||||||||||||||
Property, plant and equipment (at cost) | 47,230 | 42,934 | 41,317 | ||||||||||||||
Less: accumulated depreciation | 21,914 | 19,155 | 18,266 | ||||||||||||||
Property, plant and equipment, net | 25,316 | 23,779 | 23,051 | ||||||||||||||
Goodwill | 21,579 | 21,668 | 21,197 | ||||||||||||||
Other Intangibles, Net | 26,681 | 16,370 | 18,011 | ||||||||||||||
Other Assets | 18,818 | 16,044 | 11,996 | ||||||||||||||
Noncurrent Assets of Discontinued Operations | - | - | - | ||||||||||||||
Total Assets | 136,866 | 117,106 | 106,675 | ||||||||||||||
Liabilities and Equity | |||||||||||||||||
Current Liabilities | |||||||||||||||||
Loans payable and current portion of long-term debt | 2,589 | 2,649 | 1,372 | ||||||||||||||
Trade accounts payable | 4,404 | 4,079 | 3,922 | ||||||||||||||
Accrued and other current liabilities | 14,468 | 15,694 | 15,766 | ||||||||||||||
Income taxes payable | 4,726 | 3,914 | 2,649 | ||||||||||||||
Dividends payable | 2,140 | 2,084 | 1,985 | ||||||||||||||
Current liabilities of discontinued operations | - | - | - | ||||||||||||||
6% Mandatory convertible preferred stock, $1 par value Authorized - 11,500,000 shares issued and outstanding - 855,422 shares | - | - | - | ||||||||||||||
Total current liabilities | 28,327 | 28,420 | 25,694 | ||||||||||||||
Long-Term Debt | 46,750 | 34,462 | 33,683 | ||||||||||||||
Deferred Income Taxes | 1,439 | 1,387 | 871 | ||||||||||||||
Other Noncurrent Liabilities | 7,688 | 6,465 | 8,792 | ||||||||||||||
Noncurrent Liabilities of Discontinued Operations | - | - | - | ||||||||||||||
Deferred Income Taxes and Noncurrent Liabilities | - | - | - | ||||||||||||||
Merck & Co., Inc. Stockholders’ Equity | |||||||||||||||||
Common stock, $0.50 par value Authorized - 6,500,000,000 shares Issued - 3,577,103,522 shares in 2025 and 2024 | 1,788 | 1,788 | 1,788 | ||||||||||||||
Other paid-in capital | 45,029 | 44,704 | 44,509 | ||||||||||||||
Retained earnings | 73,075 | 63,069 | 53,895 | ||||||||||||||
Accumulated other comprehensive loss | (4,287) | (4,945) | (5,161) | ||||||||||||||
Stockholders' equity before deduction for treasury stock | 115,605 | 104,616 | 95,031 | ||||||||||||||
Less treasury stock, at cost: 1,102,476,756 shares in 2025 and 1,049,466,187 shares in 2024 | 62,999 | 58,303 | 57,450 | ||||||||||||||
Total Merck & Co., Inc. stockholders’ equity | 52,606 | 46,313 | 37,581 | ||||||||||||||
Noncontrolling Interests | 56 | 59 | 54 | ||||||||||||||
Total equity | 52,662 | 46,372 | 37,635 | ||||||||||||||
Total Liabilities and Equity | $ 136,866 | $ 117,106 | $ 106,675 |