DOE funding to National Labs dwarfs some entire science agency budgets

Fiscal Year 2024 expenditures, in billions of dollars.

Note: DOE funding for National Labs includes some non-R&D nuclear weapons and facilities maintenance. Because of the R&D intensity of the nuclear program and budget structures, it's difficult to parse which parts of their work are (and are not) R&D-related. 
Source: Agency or congressional publications.