| Schedule of Outstanding Debt |
The following table summarizes the outstanding long-term debt as of December 31, 2020 and 2019: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 2020 | | 2019 | | Maturities | | Amount | | Effective rate | | Amount | | Effective rate | Fixed-rate 4.125% senior unsecured notes | Jun, 2021 | | — | | | 4.125 | | | 1,350 | | | 4.125 | | Fixed-rate 4.625% senior unsecured notes | Jun, 2022 | | — | | | 4.625 | | | 400 | | | 4.625 | | Fixed-rate 3.875% senior unsecured notes | Sep, 2022 | | 1,000 | | | 3.875 | | | 1,000 | | | 3.875 | | Fixed-rate 4.625% senior unsecured notes | Jun, 2023 | | 900 | | | 4.625 | | | 900 | | | 4.625 | | Fixed-rate 4.875% senior unsecured notes | Mar, 2024 | | 1,000 | | | 4.875 | | | 1,000 | | | 4.875 | | Fixed-rate 2.7% senior unsecured notes | May, 2025 | | 500 | | | 2.700 | | | — | | | — | | Fixed-rate 5.35% senior unsecured notes | Mar, 2026 | | 500 | | | 5.350 | | | 500 | | | 5.350 | | Fixed-rate 3.875% senior unsecured notes | Jun, 2026 | | 750 | | | 3.875 | | | 750 | | | 3.875 | | Fixed-rate 3.15% senior unsecured notes | May, 2027 | | 500 | | | 3.150 | | | — | | | — | | Fixed-rate 5.55% senior unsecured notes | Dec, 2028 | | 500 | | | 5.550 | | | 500 | | | 5.550 | | Fixed-rate 4.3% senior unsecured notes | Jun, 2029 | | 1,000 | | | 4.300 | | | 1,000 | | | 4.300 | | Fixed-rate 3.4% senior unsecured notes | May, 2030 | | 1,000 | | | 3.400 | | | — | | | — | | | Floating-rate revolving credit facility (RCF) | Jun, 2024 | | — | | | — | | | — | | | — | | | Total principal | | | 7,650 | | | | | 7,400 | | | | Unamortized discounts, premiums and debt issuance costs | | | (41) | | | | | (35) | | | | Total debt, including unamortized discounts, premiums, debt issuance costs and fair value adjustments | | | 7,609 | | | | | 7,365 | | | | | Current portion of long-term debt | | | — | | | | | — | | | | | Long-term debt | | | 7,609 | | | | | 7,365 | | | |
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| Schedule of Long-Term Debt |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Range of interest rates | | Average rate of interest | | Principal amount outstanding 2020 | | Due in 2021 | | Due after 2021 | | Due after 2025 | | Average remaining term (in years) | | Principal amount outstanding 2019 | | USD notes | 2.7%-5.6% | | 4.2 | % | | 7,650 | | | — | | | 7,650 | | | 4,250 | | | 5.3 | | 7,400 | | | Revolving Credit Facility (1) | — | % | | — | % | | — | | | — | | | — | | | — | | | — | | | — | | | Bank borrowings | — | % | | — | % | | — | | | — | | | — | | | — | | | — | | | — | | | | | 4.2 | % | | 7,650 | | | — | | | 7,650 | | | 4,250 | | | 5.3 | | 7,400 | | (1)We do not have any borrowings under the $1,500 million Revolving Credit Facility as of December 31, 2020 and 2019.
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| Principal Amounts of Long-Term Debt |
As of December 31, 2020, the following principal amounts of long-term debt are due in the next 5 years: | | | | | | | 2021 | — | | | 2022 | 1,000 | | | 2023 | 900 | | | 2024 | 1,000 | | | 2025 | 500 | | | Due after 5 years | 4,250 | | | 7,650 | |
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