Laravel Eloquentを使用して最後に挿入されたIDを取得する方法?

$data = new Company;
$data->fill($post);
$data->save();

$lastInsertId = $data->id;

return response()->json(['success' => true, 'last_insert_id' => $lastInsertId], 200);

public function saveDetailsCompany()
{
    $post = Input::all();

    $data = new Company;
    $data->nombre = $post['name'];
    $data->direccion = $post['address'];
    $data->telefono = $post['phone'];
    $data->email = $post['email'];
    $data->giro = $post['type'];
    $data->fecha_registro = date("Y-m-d H:i:s");
    $data->fecha_modificacion = date("Y-m-d H:i:s");

    $data->save();

    return response()->json(['success' => true, 'last_insert_id' => $data->id], 200);
}