As of March 31, 2023 and December 31, 2022, long-term debt consisted of the following (in millions): | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | March 31, 2023 | | December 31, 2022 | | Outstanding Principal | | Premium (Discount) | | Long-Term Debt | | Outstanding Principal | | Premium (Discount) | | Long-Term Debt | | | | | | | | | | | | | Revolving Credit Facility due 2027 (1) | $ | 505.0 | | | $ | — | | | $ | 505.0 | | | $ | 255.0 | | | $ | — | | | $ | 255.0 | | AR Facility due 2025 (2) | 355.6 | | | — | | | 355.6 | | | 500.0 | | | — | | | 500.0 | | ENLK’s 4.40% Senior unsecured notes due 2024 | 97.9 | | | — | | | 97.9 | | | 97.9 | | | — | | | 97.9 | | ENLK’s 4.15% Senior unsecured notes due 2025 | 421.6 | | | (0.1) | | | 421.5 | | | 421.6 | | | (0.1) | | | 421.5 | | ENLK’s 4.85% Senior unsecured notes due 2026 | 491.0 | | | (0.2) | | | 490.8 | | | 491.0 | | | (0.2) | | | 490.8 | | ENLC’s 5.625% Senior unsecured notes due 2028 | 500.0 | | | — | | | 500.0 | | | 500.0 | | | — | | | 500.0 | | ENLC’s 5.375% Senior unsecured notes due 2029 | 498.7 | | | — | | | 498.7 | | | 498.7 | | | — | | | 498.7 | | ENLC’s 6.50% Senior unsecured notes due 2030 | 700.0 | | | — | | | 700.0 | | | 700.0 | | | — | | | 700.0 | | ENLK’s 5.60% Senior unsecured notes due 2044 | 350.0 | | | (0.2) | | | 349.8 | | | 350.0 | | | (0.2) | | | 349.8 | | ENLK’s 5.05% Senior unsecured notes due 2045 | 450.0 | | | (5.1) | | | 444.9 | | | 450.0 | | | (5.2) | | | 444.8 | | ENLK’s 5.45% Senior unsecured notes due 2047 | 500.0 | | | (0.1) | | | 499.9 | | | 500.0 | | | (0.1) | | | 499.9 | | Debt classified as long-term | $ | 4,869.8 | | | $ | (5.7) | | | 4,864.1 | | | $ | 4,764.2 | | | $ | (5.8) | | | 4,758.4 | | Debt issuance cost (3) | | | | | (36.1) | | | | | | | (34.9) | | | | | | | | | | | | | | Long-term debt, net of unamortized issuance cost | | | | | $ | 4,828.0 | | | | | | | $ | 4,723.5 | |
____________________________ (1)The effective interest rate was 6.9% and 6.5% at March 31, 2023 and December 31, 2022, respectively. (2)The effective interest rate was 5.8% and 5.3% at March 31, 2023 and December 31, 2022, respectively. (3)Net of accumulated amortization of $16.5 million and $15.1 million at March 31, 2023 and December 31, 2022, respectively.
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