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Debt and Credit Agreements | 3 Months Ended
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Mar. 31, 2021
Debt Disclosure [Abstract] |
Debt and Credit Agreements | Debt and Credit Agreements Total activity related to long-term debt as of the end of first quarter 2021 is shown in the table below. For fair value information related to the Company's long-term debt, see Note 10, Fair Value Measurements.
(Dollars in millions) | Current Portion | Long-term Portion | Total
Long-term Debt as of December 31, 2020 | $ | 401 |  | $ | 16,304 |  | $ | 16,705 |
2021 Activity: |  |  |
Long-term Debt Repaid | (360) |  | — |  | (360) |
Discount, Premium and Other Activity | — |  | 2 |  | 2 |
Long-term Debt as of March 31, 2021 | $ | 41 |  | $ | 16,306 |  | $ | 16,347 |
Interest Rate Derivatives On both April 29, 2020, and July 9, 2020, the Company executed a forward starting interest rate swap with a notional value of $250 million for an aggregate notional value of $500 million. These swaps were effected to hedge the benchmark interest rate associated with future interest payments related to the anticipated refinancing of $850 million of 3.25% notes due in 2027. In accordance with the Derivatives and Hedging Topic in the ASC, the Company has designated these swaps as cash flow hedges. As of March 31, 2021, the asset value of the forward starting interest rate swaps was $153 million and was recorded in other long-term assets on the consolidated balance sheet. Unrealized gains or losses associated with changes in the fair value of the hedge are recorded net of tax in accumulated other comprehensive income (“AOCI”) on the consolidated balance sheet. Unless settled early, the swaps will expire in 2027 and the unrealized gain or loss in AOCI will be recognized in earnings as an adjustment to interest expense over the same period during which the hedged transaction affects earnings. Unrealized gains, recorded net of tax in other comprehensive income, related to the hedge were $56 million for the quarter ended March 31, 2021. Credit Facility CSX has a $1.2 billion unsecured, revolving credit facility backed by a diverse syndicate of banks. This facility allows same-day borrowings at floating interest rates, based on LIBOR or an agreed-upon replacement, plus a spread that depends upon CSX's senior unsecured debt ratings. LIBOR is the London Interbank Offered Rate which is a daily reference rate based on the interest rates at which banks offer to lend unsecured funds. This facility expires in March 2024, and at March 31, 2021, the Company had no outstanding balances under this facility. Commitment fees and interest rates payable under the facility were similar to fees and rates available to comparably rated investment-grade borrowers. As of first quarter 2021, CSX was in compliance with all covenant requirements under this facility. Commercial Paper Under its commercial paper program, which is backed by the revolving credit facility, the Company may issue unsecured commercial paper notes up to a maximum aggregate principal amount of $1.0 billion outstanding at any one time. Proceeds from issuances of the notes are expected to be used for general corporate purposes. At March 31, 2021, the Company had no outstanding debt under the commercial paper program.

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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 http://asc.fasb.org/topic&trid=2208564 + Details
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