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Debt | 3 Months Ended
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Mar. 31, 2023
Debt Disclosure [Abstract] |
Debt | DEBT Long-Term Debt DT Midstream's long-term debt outstanding included:
|  |  |  |  |  | Maturity |  | March 31, |  | December 31,
Title |  | Type |  | Interest Rate |  | Date (d) |  | 2023 |  | 2022
|  |  |  |  |  |  |  | (millions)
2029 Notes |  | Senior Notes (b) |  | 4.125% |  | 2029 |  | $ | 1,100 |  |  | $ | 1,100 |
2031 Notes |  | Senior Notes (b) |  | 4.375% |  | 2031 |  | 1,000 |  |  | 1,000 |
2032 Notes |  | Senior Secured Notes (c) |  | 4.300% |  | 2032 |  | 600 |  |  | 600 |
Term Loan Facility |  | Term Loan Facility |  | Variable (a) |  | 2028 |  | 399 |  |  | 399 |
Long-term debt principal |  |  |  |  |  |  |  | 3,099 |  |  | 3,099 |
Unamortized debt discount |  |  |  |  |  |  |  | (3) |  |  | (3) |
Unamortized debt issuance costs |  |  |  |  |  |  |  | (35) |  |  | (37) |
Long-term debt |  |  |  |  |  |  |  | $ | 3,061 |  |  | $ | 3,059 |
______________________________ (a) Variable rate is LIBOR plus 2.00%, where LIBOR will not be less than 0.50%. The Term Loan Facility includes $399 million with a one-month LIBOR interest period which ended April 28, 2023. (b) Interest payable semi-annually in arrears each June 15 and December 15. (c) Interest payable semi-annually in arrears each April 15 and October 15. (d) DT Midstream does not have any scheduled debt maturities until 2028. Short-Term Credit Arrangements and Borrowings The following table presents the availability under the Revolving Credit Facility:
| March 31, |
| 2023 |
| (millions) |
Total availability |  |
Revolving Credit Facility, expiring October 2027 | $ | 1,000 |  |
Amounts outstanding |  |
Revolving Credit Facility borrowings | 410 |  |
Letters of credit | 39 |  |
| 449 |  |
Net availability | $ | 551 |  |
Borrowings under the Revolving Credit Facility are used for general corporate purposes, acquisitions, and letter of credit issuances to support DT Midstream's operations and liquidity. Revolving Credit Facility related issuance and amendment costs, net of amortization, were $7 million and $8 million, as of March 31, 2023 and December 31, 2022, respectively. These costs are included in Other noncurrent assets on DT Midstream's Consolidated Statements of Financial Position and are being amortized over the remaining term of the Revolving Credit Facility. The Credit Agreement covering the Term Loan Facility and Revolving Credit Facility includes financial covenants that DT Midstream must maintain. These covenants restrict the ability of DT Midstream and its subsidiaries to incur additional indebtedness and guarantee indebtedness, create or incur liens, engage in mergers, consolidations, liquidations or dissolutions, sell, transfer or otherwise dispose of assets, make investments, acquisitions, loans or advances, pay dividends and distributions or repurchase capital stock, prepay, redeem or repurchase certain junior indebtedness, enter into agreements that limit the ability of the restricted subsidiaries to make distributions to DT Midstream or the ability of DT Midstream and its restricted subsidiaries to incur liens on assets and enter into certain transactions with affiliates. The Term Loan Facility requires the maintenance of a minimum debt service coverage ratio of 1.1 to 1, and the Revolving Credit Facility requires maintenance of (i) a maximum consolidated net leverage ratio of 5 to 1, and (ii) a minimum interest coverage ratio of no less than 2.5 to 1. The debt service coverage ratio means the ratio of annual consolidated EBITDA to debt service, as defined in the Credit Agreement. The consolidated net leverage ratio means the ratio of net debt determined in accordance with GAAP to annual consolidated EBITDA. The interest coverage ratio means the ratio of annual consolidated EBITDA to annual interest expense, as defined in the Credit Agreement. At March 31, 2023, the debt service coverage ratio, the consolidated net leverage ratio and the interest coverage ratio was 6.9 to 1, 3.7 to 1 and 6.0 to 1, respectively, and DT Midstream was in compliance with these financial covenants.

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI https://asc.fasb.org/topic&trid=2208564 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (h) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1C -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495334-112611 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1I -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495371-112611 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1I -Subparagraph (d) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495371-112611 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(c)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (g) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1C -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495334-112611 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1C -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495334-112611 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1E -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495348-112611 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1I -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495371-112611 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 1B -Subparagraph (i) -URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611 + Details
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