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DEBT (Tables) | 12 Months Ended
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Dec. 31, 2020
Debt Instruments [Abstract] |
Long-term Debt | Long-term debt (including finance lease obligations) as of December 31, 2020 and 2019 consisted of the following:
| 2020 |  | 2019
4.75% Senior Notes due January 2020 | $ | — |  |  | $ | 500 |
2.50% Senior Notes due March 2020 | — |  |  | 300 |
4.70% Senior Notes due April 2021 | — |  |  | 554 |
4.25% Senior Notes due April 2024 | 316 |  |  | 308 |
3.50% Senior Notes due March 2025 | 622 |  |  | 593 |
3.45% Senior Notes due June 2026 | 512 |  |  | 490 |
4.20% Senior Notes due June 2029 | 499 |  |  | 499 |
2.95% Senior Notes due June 2030 | 798 |  |  | 798 |
2.80% Senior Notes due June 2031 | 549 |  |  | — |
6.95% Senior Notes due July 2037 | 175 |  |  | 175 |
5.75% Senior Notes due January 2040 | 245 |  |  | 245 |
4.70% Senior Notes due March 2045 | 300 |  |  | 300 |
Other | 27 |  |  | 34 |
Debt issuance costs | (28) |  |  | (26) |
Total long-term debt | 4,015 |  |  | 4,770 |
Less: Current portion of long-term debt | 2 |  |  | 804 |
Total long-term debt, net of current portion | $ | 4,013 |  |  | $ | 3,966 |
Schedule of Leverage Ratio Covenants | As amended, the leverage ratio covenant (as defined in the Credit Facility) was increased as follows:
As of: |  | Applicable Covenant:
December 31, 2020 |  | no more than 6.5 times EBITDA
March 31, 2021 |  | no more than 6.25 times EBITDA
June 30, 2021 |  | no more than 4.5 times EBITDA
Schedule of Maturities of Long-term Debt | As of December 31, 2020, long-term debt matures as follows:
Year Ending December 31, |
2021 | $ | 2 |
2022 | 1 |
2023 | 1 |
2024 | 302 |
2025 | 602 |
Thereafter | 3,095 |
Total maturities of long-term debt | 4,003 |
Unamortized discount | (11) |
Debt issuance costs | (28) |
Fair value basis adjustments attributable to hedged debt | 51 |
Total long-term debt | 4,015 |
Less: Current portion of long-term debt | 2 |
Total long-term debt, net of current portion | $ | 4,013 |

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- Definition The entire disclosure for long-term debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI http://asc.fasb.org/topic&trid=2208564 + Details
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