Filas divididas mongodb

No hay @Postigo,

Creo que lo entiendo.

¿Esto logra lo que quieres?

let
  Source = Csv.Document(
    File.Contents("D:\Downloads\PowerBiFile\billingletters3.csv"), 
    [Delimiter = ",", Columns = 32, Encoding = 1252, QuoteStyle = QuoteStyle.Csv]
  ), 
  #"Promoted Headers" = Table.PromoteHeaders(Source, [PromoteAllScalars = true]), 
  #"Changed Type" = Table.TransformColumnTypes(
    #"Promoted Headers", 
    {
      {"__v", Int64.Type}, 
      {"_id", type text}, 
      {"active", type logical}, 
      {"billingContacts", type text}, 
      {"changed", type datetime}, 
      {"closed", type logical}, 
      {"company._id", type text}, 
      {"company.cnpj", type text}, 
      {"company.name", type text}, 
      {"companyGroup._id", type text}, 
      {"companyGroup.name", type text}, 
      {"contacts", type text}, 
      {"cost.costCenter", Int64.Type}, 
      {"cost.executionUnity", Int64.Type}, 
      {"cost.natureType", type text}, 
      {"cost.observation", type text}, 
      {"cost.sellingValue", Int64.Type}, 
      {"cost.valueClass", Int64.Type}, 
      {"created", type datetime}, 
      {"info.costCenter", Int64.Type}, 
      {"info.executionUnity", Int64.Type}, 
      {"info.observation", type text}, 
      {"info.valueClass", Int64.Type}, 
      {"name", type text}, 
      {"owner._id", type text}, 
      {"owner.name", type text}, 
      {"parcels", type text}, 
      {"parcelsNumber", Int64.Type}, 
      {"products", type text}, 
      {"project", type text}, 
      {"projects", type text}, 
      {"refunds", type text}
    }
  ), 
  #"Parsed JSON" = Table.TransformColumns(#"Changed Type", {{"parcels", Json.Document}}), 
  #"Expanded parcels" = Table.ExpandListColumn(#"Parsed JSON", "parcels")
in
  #"Expanded parcels"

(deberá cambiar la ruta de acceso del archivo hacia atrás)

Espero que esto ayude.