| Schedule of long-term debt |
The following is a summary of long-term debt at December 31: | | | | | | | (in millions) | | 2021 | | 2020 | 2.55% Notes, due 2022 | | $ | 750 | | $ | 750 | 0.875% Notes, due 2023 | | | 1,294 | | | 1,398 | 3.40% Notes, due 2023 | | | 1,050 | | | 1,050 | 5-year term loan due 2024 | | | 521 | | | 577 | 0.10% Notes, due 2024 | | | 670 | | | 724 | 3.875% Notes, due 2025 | | | 500 | | | 500 | 2.95% Notes, due 2025 | | | 1,000 | | | 1,000 | 1.50% Notes, due 2026 | | | 1,294 | | | 1,398 | 3.75% Notes, due 2026 | | | 1,700 | | | 1,700 | 0.375% Notes, due 2027 | | | 670 | | | 724 | 1.15% Notes, due 2028 | | | 650 | | | 650 | 1.40% Notes, due 2030 | | | 650 | | | 650 | 4.75% Notes, due 2036 | | | 1,650 | | | 1,650 | 6.15% Notes, due 2037 | | | 547 | | | 547 | 6.00% Notes, due 2039 | | | 515 | | | 515 | 5.30% Notes, due 2040 | | | 694 | | | 694 | 4.75% Notes, due 2043 | | | 700 | | | 700 | 4.90% Notes, due 2046 | | | 3,250 | | | 3,250 | Unamortized debt issuance costs | | | (78) | | | (87) | Other, including fair value adjustments relating to interest rate hedge contracts designated as fair value hedges | | | 23 | | | 144 | Total carrying amount of long-term debt | | | 18,050 | | | 18,534 | Less: Current portion | | | 754 | | | 7 | Total long-term portion | | $ | 17,296 | | $ | 18,527 |
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