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v3.23.1

Commitments and Contingencies (Details) | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2023 USD ($) location | Mar. 31, 2022 USD ($) | Dec. 31, 2022 USD ($) location | Feb. 03, 2023 railcar
Loss Contingencies [Line Items] |  |  |  |
Eastern Ohio incident expense | $ 387,000,000 | $ 0 |  |
Environmental loss contingency, statement of financial position, extensible enumeration, not disclosed flag | Consolidated Balance Sheets |  | Consolidated Balance Sheets |
Responsible locations with another party | location | 8 |  |  |
Employees covered by collective bargaining agreements, percentage | 80.00% |  |  |
Self-insured injury/damage to third parties - and above, per occurrence | $ 75,000,000 |  |  |
Self-insured injury/damage to third party - up to | 800,000,000 |  |  |
Self-insured injury/damage to third parties - and above, per occurrence for specific pollution releases | $ 1,100,000,000 |  |  |
Percentage of potential losses covered | 82.00% |  |  |
Self-insured NS owned property - and above, per occurrence | $ 75,000,000 |  |  |
Self-insured NS owned property - up to | 275,000,000 |  |  |
Eastern Ohio Incident |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Environmental remediation expense | 317,000,000 |  |  |
Payments for environmental liabilities | 31,000,000 |  |  |
Other Environmental Claims |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Environmental matters liabilities | 61,000,000 |  | $ 66,000,000 |
Current environmental liability | $ 15,000,000 |  | $ 15,000,000 |
Known cleanup and remediation locations and projects | location | 85 |  | 85 |
Number of sites - representative sample | location | 20 |  |  |
Liability associated with those sites | $ 49,000,000 |  |  |
Environmental locations representative sample liability payout period, in years | 5 years |  |  |
Eastern Ohio Incident |  |  |  |
Loss Contingencies [Line Items] |  |  |  |
Number of railcars derailed | railcar |  |  |  | 38
Number of non-Company-owned tank cars contained hazardous materials | railcar |  |  |  | 11
Number of tank cars with risk of catastrophic explosion | railcar |  |  |  | 5
Eastern Ohio incident expense | $ 387,000,000 |  |  |
Cash expenditures attributable to the Incident | 55,000,000 |  |  |
Environmental matters liabilities | 332,000,000 |  |  |
Loss contingency recognized | 12,000,000 |  |  |
Loss contingency payments | $ 16,000,000 |  |  |

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