= /Expenses/
    [Assets:Budget:Unbudgeted]                  -1.0
    [Equity:Budget]                              1.0

= /Expenses:Something/
    [Assets:Budget:Something]                   -1.0
    [Assets:Budget:Unbudgeted]                   1.0

2018/08/06 Some guy
    Assets:Current:Damien                     -10.00 EUR
    Expenses:Something                         10.00 EUR