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Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Effect of Net Investment Hedges | The effects of the Company’s net investment hedges on OCI and the Consolidated Statement of Income are shown below:
| Amount of Pretax (Gain) Loss Recognized in Other Comprehensive Income (1) |  | Amount of Pretax (Gain) Loss Recognized in Other (income) expense, net for Amounts Excluded from Effectiveness Testing
Years Ended December 31 | 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018
Net Investment Hedging Relationships |  |  |  |  |  |  |  |  |  |  |
Foreign exchange contracts | $ | 26 |  |  | $ | (10) |  |  | $ | (18) |  |  | $ | (19) |  |  | $ | (31) |  |  | $ | (11) |
Euro-denominated notes | 385 |  |  | (75) |  |  | (183) |  |  | — |  |  | — |  |  | — |
(1) No amounts were reclassified from AOCI into income related to the sale of a subsidiary.
Summary of Interest Rate Derivatives | At December 31, 2020, the Company was a party to 14 pay-floating, receive-fixed interest rate swap contracts designated as fair value hedges of fixed-rate notes in which the notional amounts match the amount of the hedged fixed-rate notes as detailed in the table below:
| 2020
Debt Instrument | Par Value of Debt |  | Number of Interest Rate Swaps Held |  | Total Swap Notional Amount
3.875% notes due 2021 (1) | $ | 1,150 |  |  | 5 |  |  | $ | 1,150 |
2.40% notes due 2022 | 1,000 |  |  | 4 |  |  | 1,000 |
2.35% notes due 2022 | 1,250 |  |  | 5 |  |  | 1,250 |
(1) These interest rate swaps matured in January 2021.
Schedule of Fair Value Hedging Instruments, Statements of Financial Performance and Financial Position | The table below presents the location of amounts recorded on the Consolidated Balance Sheet related to cumulative basis adjustments for fair value hedges as of December 31:
| Carrying Amount of Hedged Liabilities |  | Cumulative Amount of Fair Value Hedging Adjustment Increase (Decrease) Included in the Carrying Amount
| 2020 |  | 2019 |  | 2020 |  | 2019
Balance Sheet Line Item in which Hedged Item is Included |  |  |  |  |  |  |
Loans payable and current portion of long-term debt | $ | 1,150 |  |  | $ | 1,249 |  |  | $ | — |  |  | $ | (1) |
Long-Term Debt | 2,301 |  |  | 3,409 |  |  | 53 |  |  | 14 |
Fair Value of Derivatives on a Gross Basis Segregated Between those Derivatives that are Designated as Hedging Instruments and those that are Not Designated as Hedging Instruments | Presented in the table below is the fair value of derivatives on a gross basis segregated between those derivatives that are designated as hedging instruments and those that are not designated as hedging instruments as of December 31:
|  |  | 2020 |  | 2019
|  |  | Fair Value of Derivative |  | U.S. Dollar Notional |  | Fair Value of Derivative |  | U.S. Dollar Notional
| Balance Sheet Caption |  | Asset |  | Liability |  | Asset |  | Liability |
Derivatives Designated as Hedging Instruments |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swap contracts | Other current assets |  | $ | 1 |  |  | $ | — |  |  | $ | 1,150 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest rate swap contracts | Other Assets |  | 54 |  |  | — |  |  | 2,250 |  |  | 15 |  |  | — |  |  | 3,400 |
Interest rate swap contracts | Accrued and other current liabilities |  | — |  |  | — |  |  | — |  |  | — |  |  | 1 |  |  | 1,250 |
Foreign exchange contracts | Other current assets |  | 12 |  |  | — |  |  | 3,183 |  |  | 152 |  |  | — |  |  | 6,117 |
Foreign exchange contracts | Other Assets |  | 45 |  |  | — |  |  | 2,030 |  |  | 55 |  |  | — |  |  | 2,160 |
Foreign exchange contracts | Accrued and other current liabilities |  | — |  |  | 217 |  |  | 5,049 |  |  | — |  |  | 22 |  |  | 1,748 |
Foreign exchange contracts | Other Noncurrent Liabilities |  | — |  |  | 1 |  |  | 52 |  |  | — |  |  | 1 |  |  | 53 |
|  |  | $ | 112 |  |  | $ | 218 |  |  | $ | 13,714 |  |  | $ | 222 |  |  | $ | 24 |  |  | $ | 14,728 |
Derivatives Not Designated as Hedging Instruments |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange contracts | Other current assets |  | $ | 70 |  |  | $ | — |  |  | $ | 7,260 |  |  | $ | 66 |  |  | $ | — |  |  | $ | 7,245 |
Foreign exchange contracts | Accrued and other current liabilities |  | — |  |  | 307 |  |  | 11,810 |  |  | — |  |  | 73 |  |  | 8,693 |
|  |  | $ | 70 |  |  | $ | 307 |  |  | $ | 19,070 |  |  | $ | 66 |  |  | $ | 73 |  |  | $ | 15,938 |
|  |  | $ | 182 |  |  | $ | 525 |  |  | $ | 32,784 |  |  | $ | 288 |  |  | $ | 97 |  |  | $ | 30,666 |
Information on Derivative Positions Subject to Master Netting Arrangements as if they were Presented on a Net Basis | The following table provides information on the Company’s derivative positions subject to these master netting arrangements as if they were presented on a net basis, allowing for the right of offset by counterparty and cash collateral exchanged per the master agreements and related credit support annexes at December 31:
| 2020 |  | 2019
| Asset |  | Liability |  | Asset |  | Liability
Gross amounts recognized in the consolidated balance sheet | $ | 182 |  |  | $ | 525 |  |  | $ | 288 |  |  | $ | 97 |
Gross amounts subject to offset in master netting arrangements not offset in the consolidated balance sheet | (156) |  |  | (156) |  |  | (84) |  |  | (84) |
Cash collateral posted/received | — |  |  | (36) |  |  | (34) |  |  | — |
Net amounts | $ | 26 |  |  | $ | 333 |  |  | $ | 170 |  |  | $ | 13 |
Location and Pretax Gain or Loss Amounts for Derivatives | The table below provides information regarding the location and amount of pretax (gains) losses of derivatives designated in fair value or cash flow hedging relationships:
| Sales |  | Other (income) expense, net (1) |  | Other comprehensive income (loss)
Years Ended December 31 | 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018 |  | 2020 |  | 2019 |  | 2018
Financial Statement Line Items in which Effects of Fair Value or Cash Flow Hedges are Recorded | $ | 47,994 |  |  | $ | 46,840 |  |  | $ | 42,294 |  |  | $ | (886) |  |  | 139 |  |  | (402) |  |  | $ | (441) |  |  | $ | (648) |  |  | $ | (361) |
(Gain) loss on fair value hedging relationships |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swap contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Hedged items | — |  |  | — |  |  | — |  |  | 40 |  |  | 95 |  |  | (27) |  |  | — |  |  | — |  |  | — |
Derivatives designated as hedging instruments | — |  |  | — |  |  | — |  |  | (76) |  |  | (65) |  |  | 50 |  |  | — |  |  | — |  |  | — |
Impact of cash flow hedging relationships |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign exchange contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of (loss) gain recognized in OCI on derivatives | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (383) |  |  | 87 |  |  | 228 |
(Decrease) increase in Sales as a result of AOCI reclassifications | (6) |  |  | 255 |  |  | (160) |  |  | — |  |  | — |  |  | — |  |  | 6 |  |  | (255) |  |  | 160 |
Interest rate contracts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amount of gain recognized in Other (income) expense, net on derivatives | — |  |  | — |  |  | — |  |  | (4) |  |  | (4) |  |  | (4) |  |  | — |  |  | — |  |  | — |
Amount of loss recognized in OCI on derivatives | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (4) |  |  | (6) |  |  | (4) |
(1) Interest expense is a component of Other (income) expense, net.
Income Statement Effects of Derivatives Not Designated as Hedging Instruments | The table below provides information regarding the income statement effects of derivatives not designated as hedging instruments:
|  |  | Amount of Derivative Pretax (Gain) Loss Recognized in Income
Years Ended December 31 |  |  | 2020 |  | 2019 |  | 2018
Derivatives Not Designated as Hedging Instruments | Income Statement Caption |  |  |  |  |  |
Foreign exchange contracts (1) | Other (income) expense, net |  | $ | (12) |  |  | $ | 174 |  |  | $ | (260) |
Foreign exchange contracts (2) | Sales |  | 13 |  |  | 1 |  |  | (8) |
Interest rate contracts (3) | Other (income) expense, net |  | 9 |  |  | — |  |  | — |
Forward contract related to Seagen common stock | Research and development expenses |  | 15 |  |  | — |  |  | — |
(1) These derivative contracts mitigate changes in the value of remeasured foreign currency denominated monetary assets and liabilities attributable to changes in foreign currency exchange rates. (2) These derivative contracts serve as economic hedges of forecasted transactions. (3) These derivatives serve as economic hedges against rising treasury rates.
Information on Investments in Debt and Equity Securities | Information on investments in debt and equity securities at December 31 is as follows:
| 2020 |  | 2019
| Amortized Cost |  | Gross Unrealized |  | Fair Value |  | Amortized Cost |  | Gross Unrealized |  | Fair Value
| Gains |  | Losses |  | Gains |  | Losses |
U.S. government and agency securities | $ | 84 |  |  | $ | — |  |  | $ | — |  |  | $ | 84 |  |  | $ | 266 |  |  | $ | 3 |  |  | $ | — |  |  | $ | 269 |
Foreign government bonds | 5 |  |  | — |  |  | — |  |  | 5 |  |  | — |  |  | — |  |  | — |  |  | — |
Commercial paper | — |  |  | — |  |  | — |  |  | — |  |  | 668 |  |  | — |  |  | — |  |  | 668 |
Corporate notes and bonds | — |  |  | — |  |  | — |  |  | — |  |  | 608 |  |  | 13 |  |  | — |  |  | 621 |
Asset-backed securities | — |  |  | — |  |  | — |  |  | — |  |  | 226 |  |  | 1 |  |  | — |  |  | 227 |
Total debt securities | 89 |  |  | — |  |  | — |  |  | 89 |  |  | 1,768 |  |  | 17 |  |  | — |  |  | 1,785 |
Publicly traded equity securities (1) |  |  |  |  |  |  | 1,787 |  |  |  |  |  |  |  |  | 838 |
Total debt and publicly traded equity securities |  |  |  |  |  |  | $ | 1,876 |  |  |  |  |  |  |  |  | $ | 2,623 |
(1) Unrealized net gains recognized in Other (income) expense, net on equity securities still held at December 31, 2020 were $163 million during 2020. Unrealized net gains recognized in Other (income) expense, net on equity securities still held at December 31, 2019 were $160 million during 2019.
Financial Assets and Liabilities Measured at Fair Value on a Recurring Basis | Financial assets and liabilities measured at fair value on a recurring basis at December 31 are summarized below:
| Fair Value Measurements Using |  | Fair Value Measurements Using
| Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
| 2020 |  | 2019
Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign government bonds | $ | — |  |  | $ | 5 |  |  | $ | — |  |  | $ | 5 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Commercial paper | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 668 |  |  | — |  |  | 668 |
Corporate notes and bonds | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 621 |  |  | — |  |  | 621 |
Asset-backed securities | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 227 |  |  | — |  |  | 227 |
U.S. government and agency securities | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 209 |  |  | — |  |  | 209 |
Publicly traded equity securities | 780 |  |  | — |  |  | — |  |  | 780 |  |  | 518 |  |  | — |  |  | — |  |  | 518 |
| 780 |  |  | 5 |  |  | — |  |  | 785 |  |  | 518 |  |  | 1,725 |  |  | — |  |  | 2,243 |
Other assets (1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government and agency securities | 84 |  |  | — |  |  | — |  |  | 84 |  |  | 60 |  |  | — |  |  | — |  |  | 60 |
Publicly traded equity securities | 1,007 |  |  | — |  |  | — |  |  | 1,007 |  |  | 320 |  |  | — |  |  | — |  |  | 320 |
| 1,091 |  |  | — |  |  | — |  |  | 1,091 |  |  | 380 |  |  | — |  |  | — |  |  | 380 |
Derivative assets (2) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forward exchange contracts | — |  |  | 90 |  |  | — |  |  | 90 |  |  | — |  |  | 169 |  |  | — |  |  | 169 |
Interest rate swaps | — |  |  | 55 |  |  | — |  |  | 55 |  |  | — |  |  | 15 |  |  | — |  |  | 15 |
Purchased currency options | — |  |  | 37 |  |  | — |  |  | 37 |  |  | — |  |  | 104 |  |  | — |  |  | 104 |
| — |  |  | 182 |  |  | — |  |  | 182 |  |  | — |  |  | 288 |  |  | — |  |  | 288 |
Total assets | $ | 1,871 |  |  | $ | 187 |  |  | $ | — |  |  | $ | 2,058 |  |  | $ | 898 |  |  | $ | 2,013 |  |  | $ | — |  |  | $ | 2,911 |
Liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration | $ | — |  |  | $ | — |  |  | $ | 841 |  |  | $ | 841 |  |  | $ | — |  |  | $ | — |  |  | $ | 767 |  |  | $ | 767 |
Derivative liabilities (2) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Forward exchange contracts | — |  |  | 505 |  |  | — |  |  | 505 |  |  | — |  |  | 95 |  |  | — |  |  | 95 |
Written currency options | — |  |  | 20 |  |  | — |  |  | 20 |  |  | — |  |  | 1 |  |  | — |  |  | 1 |
Interest rate swaps | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1 |  |  | — |  |  | 1 |
| — |  |  | 525 |  |  | — |  |  | 525 |  |  | — |  |  | 97 |  |  | — |  |  | 97 |
Total liabilities | $ | — |  |  | $ | 525 |  |  | $ | 841 |  |  | $ | 1,366 |  |  | $ | — |  |  | $ | 97 |  |  | $ | 767 |  |  | $ | 864 |
(1) Investments included in other assets are restricted as to use, including for the payment of benefits under employee benefit plans. (2) The fair value determination of derivatives includes the impact of the credit risk of counterparties to the derivatives and the Company’s own credit risk, the effects of which were not significant.
Summarized Information about the Changes in Liabilities for Contingent Consideration | Summarized information about the changes in liabilities for contingent consideration associated with business acquisitions is as follows:
| 2020 |  | 2019
Fair value January 1 | $ | 767 |  |  | $ | 788 |
Additions | 97 |  |  | — |
Changes in estimated fair value (1) | 83 |  |  | 64 |
Payments | (106) |  |  | (85) |
Fair value December 31 (2)(3) | $ | 841 |  |  | $ | 767 |
(1) Recorded in Cost of sales, Research and development expenses, and Other (income) expense, net. Includes cumulative translation adjustments. (2) Balance at December 31, 2020 includes $148 million recorded as a current liability for amounts expected to be paid within the next 12 months. (3) At December 31, 2020 and 2019, $711 million and $625 million, respectively, of the liabilities relate to the termination of the Sanofi Pasteur MSD joint venture in 2016. As part of the termination, Merck recorded a liability for contingent future royalty payments of 11.5% on net sales of all Merck products that were previously sold by the joint venture through December 31, 2024. The fair value of this liability is determined utilizing the estimated amount and timing of projected cash flows and a risk-adjusted discount rate of 8% to present value the cash flows.

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