XML 81 R40.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Loans Payable, Long-Term Debt and Leases (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2024
Debt Disclosure [Abstract] |
Schedule of Long-term Debt Instruments | Long-term debt at December 31 consisted of:
| 2024 |  | 2023
2.15% notes due 2031 | $ | 1,989 |  |  | $ | 1,988 |
2.75% notes due 2051 | 1,980 |  |  | 1,980 |
3.70% notes due 2045 | 1,980 |  |  | 1,979 |
3.40% notes due 2029 | 1,742 |  |  | 1,740 |
4.50% notes due 2033 | 1,509 |  |  | 1,547 |
1.70% notes due 2027 | 1,497 |  |  | 1,495 |
2.90% notes due 2061 | 1,484 |  |  | 1,484 |
5.00% notes due 2053 | 1,482 |  |  | 1,481 |
4.00% notes due 2049 | 1,474 |  |  | 1,473 |
4.15% notes due 2043 | 1,240 |  |  | 1,240 |
1.45% notes due 2030 | 1,240 |  |  | 1,238 |
2.45% notes due 2050 | 1,216 |  |  | 1,214 |
1.875% euro-denominated notes due 2026 | 1,041 |  |  | 1,103 |
0.75% notes due 2026 | 998 |  |  | 996 |
1.90% notes due 2028 | 996 |  |  | 995 |
5.15% notes due 2063 | 987 |  |  | 987 |
3.90% notes due 2039 | 987 |  |  | 986 |
2.35% notes due 2040 | 986 |  |  | 985 |
3.25% euro-denominated notes due 2032 | 880 |  |  | — |
3.50% euro-denominated notes due 2037 | 877 |  |  | — |
3.70% euro-denominated notes due 2044 | 876 |  |  | — |
3.75% euro-denominated notes due 2054 | 873 |  |  | — |
4.30% notes due 2030 | 746 |  |  | 745 |
4.90% notes due 2044 | 740 |  |  | 740 |
6.50% notes due 2033 | 702 |  |  | 707 |
1.375% euro-denominated notes due 2036 | 517 |  |  | 548 |
2.50% euro-denominated notes due 2034 | 517 |  |  | 548 |
4.05% notes due 2028 | 498 |  |  | 497 |
3.60% notes due 2042 | 492 |  |  | 492 |
6.55% notes due 2037 | 404 |  |  | 406 |
5.75% notes due 2036 | 339 |  |  | 339 |
5.95% debentures due 2028 | 307 |  |  | 307 |
5.85% notes due 2039 | 271 |  |  | 271 |
6.40% debentures due 2028 | 251 |  |  | 250 |
6.30% debentures due 2026 | 135 |  |  | 135 |
2.75% notes due 2025 | — |  |  | 2,498 |
Other | 209 |  |  | 289 |
| $ | 34,462 |  |  | $ | 33,683 |
Supplemental Balance Sheet Information | Supplemental balance sheet information related to operating leases is as follows:
December 31 | 2024 |  | 2023 |  |
Assets |  |  |  |  |
Other Assets (1) | $ | 1,370 |  |  | $ | 1,437 |  |  |
Liabilities |  |  |  |  |
Accrued and other current liabilities | 282 |  |  | 285 |  |  |
Other Noncurrent Liabilities | 877 |  |  | 928 |  |  |
| $ | 1,159 |  |  | $ | 1,213 |  |  |
Weighted-average remaining lease term (years) | 6.0 |  | 7.0 |  |
Weighted-average discount rate | 3.2 | % |  | 3.3 | % |  |
(1) Includes prepaid leases that have no related lease liability.
Schedule of Maturities of Operating Lease Liabilities | Maturities of operating leases liabilities are as follows:
2025 | $ | 329 |
2026 | 292 |
2027 | 235 |
2028 | 146 |
2029 | 116 |
Thereafter | 403 |
Total lease payments | 1,521 |
Less: Imputed interest | 362 |
| $ | 1,159 |

X
- Definition Lease Assets and Liabilities, Lessee [Table Text Block] + References No definition available. + Details
Name: | mrk_LeaseAssetsAndLiabilitiesLesseeTableTextBlock
Namespace Prefix: | mrk_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DebtDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-6 + Details
Name: | us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69B -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69B Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 69E -Publisher FASB -URI https://asc.fasb.org/1943274/2147481568/470-20-55-69E Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Subparagraph (SX 210.12-04(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-3 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 835 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482925/835-30-45-2 Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-3 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 942 -SubTopic 470 -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477734/942-470-50-3 Reference 8: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 8 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-8 Reference 9: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-6 Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 505 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481112/505-10-50-7 + Details
Name: | us-gaap_ScheduleOfDebtInstrumentsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration