Demand for long-distance journeys fell by 90 percent in April, with local journeys down 80 percent and even freight traffic falling 40 percent, according to the document.
The state-owned Deutsche Bahn group as a whole is expecting to lose 11 to 13.5 billion euros ($11.9-$14.6 billion) between 2020 and 2024, with the rail network alone expected to account for 8.2 to 10.2 billion euros of this.
The company is hoping to find half of this sum - 4.1 to 5.1 billion euros - through cost-saving measures such as putting staff on shorter hours and scrapping bonuses.
The government will provide 75 percent of the rest, with an initial capital injection of 4.5 billion euros expected "in the coming weeks" and the rest towards the end of the year.
The company's debt limit will also be increased from a current ceiling of 25.4 billion euros.
The plans must first be approved by the budget committee in the Bundestag, Germany's lower house of parliament, as well as the European Commission.
A spokesman for Deutsche Bahn declined to comment on the report but pointed to a planned supervisory board meeting on Friday.