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v3.22.2.2

Nature of Operations and Significant Accounting Policies (Details) $ in Millions | 1 Months Ended | 3 Months Ended | 9 Months Ended | 19 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 30, 2022 USD ($) | Apr. 30, 2021 USD ($) | Sep. 30, 2022 USD ($) state mi | Jun. 30, 2022 USD ($) | Mar. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2022 USD ($) state mi | Sep. 30, 2021 USD ($) | Oct. 20, 2022 USD ($) | Mar. 26, 2021 USD ($) phase property
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of rail route miles | mi |  |  | 20,000 |  |  |  |  | 20,000 |  |  |
Number of states rail network serves | state |  |  | 26 |  |  |  |  | 26 |  |  |
Proceeds |  |  |  |  |  |  |  | $ 51 | $ 297 |  |
Gains |  |  | $ 27 |  |  |  | $ 60 | 183 | 430 |  |
Virginia Line Segments |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Number of property rights for sale | property |  |  |  |  |  |  |  |  |  |  | 3
Number of phases to complete property rights sale transaction | phase |  |  |  |  |  |  |  |  |  |  | 3
Total sale price |  |  |  |  |  |  |  |  |  |  | $ 525
Proceeds |  | $ 200 |  |  |  | $ 200 |  | 0 | 200 |  |
Gains |  | $ 349 |  | $ 122 | $ 20 |  |  | $ 142 | $ 349 |  |
Sale price, period approved amount | $ 125 |  |  |  |  |  |  |  |  |  |
Virginia Line Segments | Subsequent Event |  |  |  |  |  |  |  |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Proceeds |  |  |  |  |  |  |  |  |  | $ 400 |
Gains |  |  |  |  |  |  |  |  |  | $ 491 |

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