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Debt and Credit Agreements (Tables)
 12 Months Ended
Dec. 31, 2022
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments
Debt at December 2022 and December 2021 is shown in the table below. For information regarding the fair value of debt, see Note 13, Fair Value Measurements.
Maturity at
December		Average
Interest
Rates at
December		DecemberDecember
(Dollars in Millions)2022202220222021
Notes2023-20684.2%$17,877 $16,166 
Equipment Obligations(a)
2023-20276.2%141 153 
Finance Leases2023-20326.0%29 47 
Subtotal Long-term Debt (Including Current Portion) $18,047 $16,366 
Less Debt Due within One Year  (151)(181)
Long-term Debt (Excluding Current Portion)  $17,896 $16,185 
(a) Equipment obligations are secured by an interest in certain railroad equipment.
Schedule of Long-term Debt Maturities
Long-term Debt Maturities (Net of Discounts, Premiums and Issuance Costs)
(Dollars in millions)Maturities at
Years EndingDecember 2022
2023$151 
2024558 
2025606 
2026704 
2027998 
Thereafter15,030 
Total Long-term Debt Maturities, including current portion$18,047 
Schedule of Interest Rate Derivatives The amounts recorded in long-term debt on the consolidated balance sheet related to these fair value hedges is summarized in the table below.
(Dollars in Millions)
December 31, 2022
Notional Value of Hedged Notes
$800 
Cumulative Fair Value Adjustment to Hedged Notes
(118)
Carrying Amount of Hedged Notes
$682